Web Search & Data API · SERP, page reader & scrapers
payment-ready until 2026-10-26
imported from the x402 Bazaar, not submitted by the operator · own this service? claim it · or ask to be removed
Pay-per-call web search and web data for AI agents.
Call it x402 v2
x402 v2
- Base URL
- https://api.kadec0.xyz
- Payment
- x402 v2, header channel
$ curl -i 'https://api.kadec0.xyz/v1/author-search' An unpaid request returns HTTP 402 with the payment terms. Sign a payment authorization, then retry with the PAYMENT-SIGNATURE header.
Endpoints 43 paid routes on api.kadec0.xyz
GET/v1/author-search Base$0.02since 09-08
GET/v1/congress-trades Base$0.05since 09-08
GET/v1/cve Base$0.01since 09-08
GET/v1/defi-tvl Base$0.02since 09-08
GET/v1/dns-propagation Base$0.03since 09-08
GET/v1/domain-info Base$0.02since 09-08
GET/v1/email-validate Base$0.03since 09-08
GET/v1/enrich Base$0.15since 09-08
35 more in Example 402 response
Prices as captured in the 402 response: median $0.03 across the 43 endpoints.
Example 402 response
Endpoints and prices
| Method | Path | Description | Price | Network | Asset | 402 channel | Captured |
|---|---|---|---|---|---|---|---|
| GET | / | Author and researcher profile search. An author name returns matching researchers with current affiliation, publication count, total citations, h-index and i10-index, and their most-cited papers · for author lookup, disambiguation, and citation-metrics. Keyless via OpenAlex. | $0.02 | Base | USDC | header | since 09-08 |
| GET | / | US congressional stock trades. Stock transactions disclosed by members of the House and Senate under the STOCK Act · politician, ticker, amount, and date. | $0.05 | Base | USDC | header | since 09-08 |
| GET | / | CVE vulnerability lookup. Returns security vulnerability records by CVE id or keyword from the NIST National Vulnerability Database and GitHub Security Advisories, each with CVSS score, severity, CWE weakness class, affected products, and references, filterable by severity and source. For vulnerability triage and dependency risk checks. Keyless. | $0.01 | Base | USDC | header | since 09-08 |
| GET | / | DeFi TVL for protocols and chains. Returns total value locked per DeFi protocol or per chain via DefiLlama, with category, supported chains, and TVL change over time, filterable by category or chain. For DeFi protocol screening, chain-level TVL comparison, and tracking where liquidity is moving. Keyless. | $0.02 | Base | USDC | header | since 09-08 |
| GET | / | DNS propagation checker. Compares a DNS record across public resolvers (Google, Cloudflare, Quad9, OpenDNS) to spot propagation lag or split-horizon answers. | $0.03 | Base | USDC | header | since 09-08 |
| GET | / | Domain WHOIS and DNS lookup. Registrar, creation and expiry dates, nameservers, and full DNS records (A, AAAA, MX, NS, TXT, CNAME) for a domain. | $0.02 | Base | USDC | header | since 09-08 |
| GET | / | Email validation and email list cleaning. Checks each email address for RFC syntax, a live MX record lookup returning the real mail hosts, disposable-domain detection, role-account flags (info@, sales@, noreply@), and a free-provider flag, rolled into a per-address ok/risky/invalid verdict with reasons. Batch up to 25 email addresses per call. Domain-level DNS only, no SMTP mailbox probe. Keyless. | $0.03 | Base | USDC | header | since 09-08 |
| GET | / | Company domain enrichment. Firmographics, tech-stack detection, social profiles, and metadata for a company domain · a keyless one-call enrichment gateway. | $0.15 | Base | USDC | header | since 09-08 |
| GET | / | FDA recalls and adverse events. Drug, device, and food recall and adverse-event records from openFDA with classification, recalling firm, and reason. | $0.02 | Base | USDC | header | since 09-08 |
| GET | / | Ethereum gas price oracle. Returns the current Ethereum gas price as an EIP-1559 base fee plus priority-fee estimates across five confidence tiers, all in gwei, so an agent can price a transaction before it signs one. Ethereum mainnet only. Keyless, via Blocknative. | $0.01 | Base | USDC | header | since 09-08 |
| GET | / | Geocoding and reverse geocoding. Converts an address or place name to latitude/longitude, or coordinates back to an address. | $0.01 | Base | USDC | header | since 07-20 |
| GET | / | GitHub data. Repository stats, user profiles, and code-search results (stars, forks, language, topics, issues) via the GitHub REST API. | $0.02 | Base | USDC | header | since 07-20 |
| GET | / | Hacker News feed. Top, new, and best front-page stories plus full-text story search · titles, scores, comment counts, and author for tech and startup news. | $0.01 | Base | USDC | header | since 07-20 |
| GET | / | Google Trends interest by region for a keyword. Returns the subregional breakdown of Google Trends search interest inside a country - by state, province, or region - each ranked 0-100 relative to the strongest region. For regional demand mapping, geo targeting, and finding where a keyword over-indexes before spending on it. | $0.03 | Base | USDC | header | since 09-08 |
| GET | / | Literature review map in one call. Give a seed paper (DOI, arXiv id, OpenAlex id, or PMID) or a topic query and get one structured result: the seed's references, its cited-by list (most-cited first), and semantically related work, deduplicated into one uniform table with title, authors, year, venue, DOI, and citation count. Collapses search, citation lookup, and related-paper discovery into a single call. Keyless. | $0.08 | Base | USDC | header | since 09-08 |
| GET | / | Market fear & greed index. Aggregated investor sentiment from CNN Fear & Greed, the crypto Fear & Greed index, and the VIX volatility gauge. | $0.05 | Base | USDC | header | since 09-08 |
| GET | / | Food nutrition lookup. Calories, macros, and micronutrients for any food from the USDA FoodData Central database. | $0.01 | Base | USDC | header | since 09-08 |
| GET | / | Citation lookup and reference list for a paper. Given a DOI, arXiv id, OpenAlex id, or PMID, returns its references (the works it cites) and its cited-by list (recent works that cite it), plus full metadata and citation count · for bibliography building and citation lookup. Keyless via OpenAlex and Semantic Scholar. | $0.03 | Base | USDC | header | since 09-08 |
| GET | / | Full text and open-access PDF retrieval for a paper. Given an arXiv id, DOI, OpenAlex id, PMID, or PMCID, returns the readable body split into sections (introduction, methods, results) plus the open-access PDF location: arXiv via ar5iv, biomedical via Europe PMC, OA locations via OpenAlex for the rest. The 'now read it' call after a paper search. Keyless. | $0.04 | Base | USDC | header | since 07-20 |
| GET | / | Academic and scientific paper search API. Search research papers and scholarly literature across arXiv, PubMed, OpenAlex, Crossref, and Semantic Scholar in one call, deduplicated into a ranked result set: title, authors, year, venue, abstract, citation count, DOI, and direct PDF link. Query by keyword or restrict to one source; filter by year range; sort by relevance, recency, or citations. Keyless. | $0.02 | Base | USDC | header | since 09-08 |
| GET | / | Building permit records. Construction and building permits across Chicago, NYC, Seattle, and San Francisco · type, status, address, cost, and issue date. | $0.03 | Base | USDC | header | since 09-08 |
| GET | / | Consumer product recalls. A normalized multi-agency recall feed spanning FDA, CPSC, and NHTSA · product, reason, company, classification, and severity. | $0.02 | Base | USDC | header | since 09-08 |
| GET | / | Literature review and related-paper discovery. Given a seed paper (arXiv id, DOI, or OpenAlex id) or a topic query, returns semantically similar and recommended scholarly papers to expand a reading list or systematic review, via Semantic Scholar recommendations with an OpenAlex related-works fallback. Keyless. | $0.03 | Base | USDC | header | since 09-08 |
| GET | / | Google Trends related queries for a keyword. Returns the searches people run alongside a keyword in a given country: top queries scored 0-100 relative to each other, and rising queries with their percentage growth. Google Trends keyword expansion for SEO keyword research, content planning, and spotting breakout search demand early. | $0.03 | Base | USDC | header | since 09-08 |
| GET | / | Google Trends related topics for a keyword. Returns the topics and named entities associated with a keyword in a given country, as top topics scored 0-100 relative to each other and rising topics with percentage growth, each carrying its entity type. Google Trends topic discovery for market research and content planning. | $0.03 | Base | USDC | header | since 09-08 |
| GET | / | Scrape any web page to clean markdown. A keyless web scraper that converts a single URL into LLM-ready markdown plus structured metadata (title, headings, links, word count), so an agent can read a page without running a browser. A per-call alternative to Firecrawl's scrape endpoint, with no API key and no account. Single page per call, not a site crawler. | $0.03 | Base | USDC | header | since 07-20 |
| GET | / | SEC filings full-text search. Searches SEC EDGAR filings - 10-K, 10-Q, 8-K, and every other form type - by keyword, company name, ticker, or CIK, with date-range filtering, returning company, form type, filing date, accession number, and a direct document link. For SEC filings research and disclosure monitoring. Keyless. | $0.05 | Base | USDC | header | since 07-20 |
| GET | / | Web search results (SERP). Keyless web search returning ranked title, URL, and snippet for a query · with locale/region targeting, freshness filters (past day, week, month, year), pagination, a news mode that adds publish date and source, and selectable backend engine (auto rotation, or pin Brave, Yahoo, or Yandex). | $0.05 | Base | USDC | header | since 09-08 |
| GET | / | Bulk web search: up to 5 search queries in a single call, each returning ranked title, URL, and snippet, with the same locale, freshness, and news filters as the single-query web search. One paid call instead of five for research fan-out. | $0.10 | Base | USDC | header | since 07-20 |
| GET | / | Multi-engine web search (metasearch). One search query fanned out across 2-3 search engines (Brave, Yahoo, Yandex) with results deduplicated by URL and merged by reciprocal-rank fusion: consensus ranking across engines instead of one engine's bias, with per-engine rank attribution on every result. | $0.05 | Base | USDC | header | since 07-20 |
| GET | / | Web search plus page reading in one call: answer with sources. Runs a web search, scrapes the top results, and returns the ranked search results together with each page's content as clean LLM-ready markdown, so an agent gets the SERP AND the underlying text without a second round of scrape calls. Per-page fetch errors are reported honestly per URL. | $0.08 | Base | USDC | header | since 07-20 |
| GET | / | Smart, auto-routed research paper search. A broad field term is grounded against the OpenAlex taxonomy and returned as a coherent field cluster; a natural-language question runs hybrid retrieval over OpenAlex and Semantic Scholar with reciprocal rank fusion and a SPECTER2 embedding rerank. The response exposes the routing decision, and each paper carries title, authors, year, venue, citation count, DOI, and a relevance score. Keyless. | $0.02 | Base | USDC | header | since 09-08 |
| GET | / | Stablecoin supply data. Returns circulating supply for stablecoins broken down across chains via DefiLlama, filterable by peg type and by collateral mechanism, so you can compare fiat-backed against crypto-backed and algorithmic stablecoins. For stablecoin market share, depeg watch, and chain-level supply tracking. Keyless. | $0.02 | Base | USDC | header | since 09-08 |
| GET | / | Stack Overflow Q&A. Programming question and answer search with scores, accepted-answer flags, tags, and answer bodies via the Stack Exchange API. | $0.01 | Base | USDC | header | since 09-08 |
| GET | / | Crypto token price and market data. Returns the live price of one or many tokens by coin id or ticker symbol, in a chosen vs-currency, with market cap, 24-hour volume, and 24-hour price change. For crypto price lookups, portfolio valuation, and market data feeds. Keyless, via CoinPaprika. | $0.01 | Base | USDC | header | since 09-08 |
| GET | / | Field and topic search for research papers. Give a broad field name or short phrase (like 'crispr' or 'exercise science') and get a coherent, taxonomy-grounded seed cluster: the field is resolved against the OpenAlex topics taxonomy, then the cluster returns the top-cited plus recent-influential works, each with title, authors, year, venue, citation count, and DOI. Solves the broad-term entry problem dense semantic search fails on. Keyless. | $0.02 | Base | USDC | header | since 09-08 |
| GET | / | Google Trends interest over time for a keyword. Returns Google Trends search interest as a dated series indexed 0-100: weekly points across the default past 12 months, daily points for 30- and 90-day windows, and windows from the past hour back to 2004, with optional country targeting. For keyword trend analysis, search demand seasonality, and SEO keyword research. | $0.05 | Base | USDC | header | since 09-08 |
| GET | / | Trending crypto coins. The coins most searched on CoinGecko right now, with rank, price, and market-cap rank. | $0.01 | Base | USDC | header | since 09-08 |
| GET | / | Real-time earthquake feed. Recent seismic events from USGS with magnitude, location, depth, and tsunami flag, filterable by magnitude, time, and radius. | $0.005 | Base | USDC | header | since 09-08 |
| GET | / | Weather forecast and air quality for any location worldwide. Returns current conditions plus a 16-day daily weather forecast - temperature highs and lows, precipitation, and wind - alongside air-quality readings including AQI, PM2.5, PM10, and ozone, for any latitude and longitude. Daily forecast resolution. Keyless, via Open-Meteo. | $0.005 | Base | USDC | header | since 09-08 |
| GET | / | Instant website SEO audit. On-page SEO, performance, and accessibility snapshot for any URL · title, meta tags, headings, links, image alt, load time, and an issues list with score. | $0.08 | Base | USDC | header | since 07-20 |
| GET | / | Bulk WHOIS lookup. Registrar, dates, and nameservers for up to 10 domains in a single batch call. | $0.05 | Base | USDC | header | since 09-08 |
| GET | / | DeFi yield and APY across pools. Returns the top yield-farming pools via DefiLlama with current APY, base and reward APY split, TVL, chain, and project, filterable by chain, project, symbol, stablecoin-only, minimum TVL, and minimum APY. For yield discovery and comparing APY across protocols. Keyless. | $0.03 | Base | USDC | header | since 09-08 |
Payment evidence
402 payload captured at . Check evidence JSON · Measurement methodology.
First of 43 payloads captured by the monitor.
165 lines, scroll inside
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/serp",
"tags": [
"search",
"web-search",
"web",
"serp",
"search-results"
],
"mimeType": "application/json",
"description": "Web search results (SERP). Keyless web search returning ranked title, URL, and snippet for a query — with locale/region targeting, freshness filters (past day, week, month, year), pagination, a news mode that adds publish date and source, and selectable backend engine (auto rotation, or pin Brave, Yahoo, or Yandex).",
"serviceName": "Web Search (SERP)"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "best python web scraping library",
"num_results": "10"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"url": "https://example.com/tutorial",
"rank": 1,
"type": "search_result",
"title": "Python Web Scraping Tutorial",
"snippet": "Learn how to scrape data..."
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"q"
],
"properties": {
"q": {
"type": "string",
"description": "search query"
},
"mode": {
"enum": [
"web",
"news"
],
"type": "string",
"default": "web",
"description": "web results or recent news (news adds date+source per item). the news index is narrow, so a long or highly specific news query that matches nothing falls through to web rather than returning empty; those items carry requestedMode=news and servedBy=web"
},
"page": {
"type": "string",
"default": "1",
"description": "result page (pagination)"
},
"engine": {
"type": "string",
"default": "auto",
"description": "search backend: auto (recommended - rotates engines and falls back on blocks) or pin one of yahoo, yandex (web mode); news mode supports bing. when set, each result carries an 'engine' field; if the pinned engine returns nothing, auto serves instead and results also carry 'requestedEngine'"
},
"region": {
"type": "string",
"default": "us-en",
"description": "locale, e.g. us-en, uk-en, de-de"
},
"timelimit": {
"enum": [
"d",
"w",
"m",
"y"
],
"type": "string",
"description": "restrict to past day/week/month/year"
},
"safesearch": {
"enum": [
"on",
"moderate",
"off"
],
"type": "string",
"default": "moderate"
},
"num_results": {
"type": "string",
"default": "10",
"description": "max results, cap 25"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
} Other captured 402 responses (42)
Captured payload 2 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/usgs-quakes",
"tags": [
"usgs",
"earthquakes",
"seismology",
"geological",
"government"
],
"mimeType": "application/json",
"description": "Real-time earthquake feed. Recent seismic events from USGS with magnitude, location, depth, and tsunami flag, filterable by magnitude, time, and radius.",
"serviceName": "USGS Earthquake Feed"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"starttime": "2026-06-18",
"minmagnitude": "4.5"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"type": "earthquake",
"place": "10 km S of Kastri, Greece",
"depthKm": 10,
"tsunami": 0,
"latitude": 34.74,
"longitude": 24.1,
"magnitude": 5.2
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"limit": {
"type": "string",
"default": "50"
},
"endtime": {
"type": "string",
"description": "ISO date/time"
},
"latitude": {
"type": "string",
"description": "radius search center lat (needs longitude+maxradiuskm)"
},
"longitude": {
"type": "string"
},
"starttime": {
"type": "string",
"description": "ISO date/time (default: 24h ago)"
},
"maxradiuskm": {
"type": "string"
},
"minmagnitude": {
"type": "string",
"default": "2.5"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 3 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/weather",
"tags": [
"weather",
"forecast",
"air-quality",
"meteorology",
"climate"
],
"mimeType": "application/json",
"description": "Weather forecast and air quality for any location worldwide. Returns current conditions plus a 16-day daily weather forecast - temperature highs and lows, precipitation, and wind - alongside air-quality readings including AQI, PM2.5, PM10, and ozone, for any latitude and longitude. Daily forecast resolution. Keyless, via Open-Meteo.",
"serviceName": "Weather Forecast & Air Quality"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"lat": "52.52",
"lng": "13.41",
"forecast_days": "3"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"type": "weather",
"current": {
"condition": "Overcast",
"temperature": 23.2
},
"forecast": [
{
"date": "2026-06-21",
"tempMax": 26,
"condition": "Clear sky"
}
],
"airQuality": {
"usAqi": 34
}
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"lat",
"lng"
],
"properties": {
"lat": {
"type": "string",
"description": "latitude -90..90"
},
"lng": {
"type": "string",
"description": "longitude -180..180"
},
"forecast_days": {
"type": "string",
"default": "7",
"description": "1-16"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 4 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/congress-trades",
"tags": [
"congress",
"stock-trades",
"politics",
"finance",
"government"
],
"mimeType": "application/json",
"description": "US congressional stock trades. Stock transactions disclosed by members of the House and Senate under the STOCK Act — politician, ticker, amount, and date.",
"serviceName": "Congress Stock Trades"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"ticker": "NVDA",
"chamber": "house"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"type": "congress_trade",
"party": "R",
"state": "NJ",
"docUrl": "https://disclosures-clerk.house.gov/public_disc/ptr-pdfs/2026/20034783.pdf",
"ticker": "EQT",
"chamber": "house",
"politician": "Thomas H. Kean Jr",
"amountRange": "$1,001 - $15,000",
"transactionDate": "2026-06-01",
"transactionType": "Purchase"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"type": {
"type": "string",
"description": "transaction type substring e.g. purchase|sale"
},
"ticker": {
"type": "string",
"description": "stock ticker, exact"
},
"chamber": {
"enum": [
"house",
"senate"
],
"type": "string"
},
"maxItems": {
"type": "string",
"default": "50"
},
"dateRange": {
"type": "string",
"description": "YYYY-MM-DD..YYYY-MM-DD on transaction date"
},
"politician": {
"type": "string",
"description": "filer name substring"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 5 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/related-queries",
"tags": [
"google-trends",
"trends",
"related-queries",
"keyword-research",
"seo"
],
"mimeType": "application/json",
"description": "Google Trends related queries for a keyword. Returns the searches people run alongside a keyword in a given country: top queries scored 0-100 relative to each other, and rising queries with their percentage growth. Google Trends keyword expansion for SEO keyword research, content planning, and spotting breakout search demand early.",
"serviceName": "Google Trends Related Queries"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"geo": "US",
"keyword": "bitcoin"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"geo": "US",
"top": [
{
"term": "bitcoin price",
"value": 100
},
{
"term": "bitcoin stock",
"value": 17
}
],
"type": "google_trends_related_queries",
"stale": false,
"rising": [
{
"term": "how to buy bitcoin safely",
"value": 14900
}
],
"keyword": "bitcoin",
"queriedAt": "2026-09-02T19:38:34Z",
"timeframe": "past_12_months",
"dataSource": "primary"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"keyword",
"geo"
],
"properties": {
"geo": {
"type": "string",
"description": "ISO-3166 alpha-2 country code, e.g. US, GB, DE, JP (213 countries supported)"
},
"keyword": {
"type": "string",
"description": "the search term"
},
"timeframe": {
"enum": [
"2004_present",
"past_12_months",
"past_30_days",
"past_4_hours",
"past_5_years",
"past_7_days",
"past_90_days",
"past_day",
"past_hour"
],
"type": "string",
"default": "past_12_months",
"description": "time window. Each response reports its own bucket size in `granularity`: past_30_days and past_90_days return a daily series, past_12_months and past_5_years weekly, windows under a day hourly"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 6 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/cve",
"tags": [
"cve",
"vulnerability",
"vulnerabilities",
"security",
"nist"
],
"mimeType": "application/json",
"description": "CVE vulnerability lookup. Returns security vulnerability records by CVE id or keyword from the NIST National Vulnerability Database and GitHub Security Advisories, each with CVSS score, severity, CWE weakness class, affected products, and references, filterable by severity and source. For vulnerability triage and dependency risk checks. Keyless.",
"serviceName": "CVE Vulnerability Lookup"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"keyword": "log4j",
"severity": "critical"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"id": "CVE-2021-44228",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-44228",
"cwes": [
"CWE-502"
],
"type": "cve",
"source": "nvd",
"severity": "CRITICAL",
"cvssScore": 10
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"anyOf": [
{
"required": [
"cve_id"
]
},
{
"required": [
"keyword"
]
}
],
"required": [],
"properties": {
"cve_id": {
"type": "string",
"description": "exact CVE id, e.g. CVE-2021-44228"
},
"source": {
"enum": [
"nvd",
"github",
"all"
],
"type": "string",
"default": "all"
},
"keyword": {
"type": "string",
"description": "free-text search"
},
"maxItems": {
"type": "string",
"default": "20"
},
"severity": {
"enum": [
"low",
"medium",
"high",
"critical"
],
"type": "string"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 7 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/related-topics",
"tags": [
"google-trends",
"trends",
"related-topics",
"keyword-research",
"market-research"
],
"mimeType": "application/json",
"description": "Google Trends related topics for a keyword. Returns the topics and named entities associated with a keyword in a given country, as top topics scored 0-100 relative to each other and rising topics with percentage growth, each carrying its entity type. Google Trends topic discovery for market research and content planning.",
"serviceName": "Google Trends Related Topics"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"geo": "US",
"keyword": "bitcoin"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"geo": "US",
"top": [
{
"type": "Cryptocurrency",
"topic": "Bitcoin",
"value": 100,
"topicId": "/m/05p0rrx"
}
],
"type": "google_trends_related_topics",
"stale": false,
"rising": [
{
"type": "News agency company",
"topic": "Reuters",
"value": 2700,
"topicId": "/m/0ps53"
}
],
"keyword": "bitcoin",
"queriedAt": "2026-09-02T19:38:34Z",
"timeframe": "past_12_months",
"dataSource": "primary"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"keyword",
"geo"
],
"properties": {
"geo": {
"type": "string",
"description": "ISO-3166 alpha-2 country code, e.g. US, GB, DE, JP (213 countries supported)"
},
"keyword": {
"type": "string",
"description": "the search term"
},
"timeframe": {
"enum": [
"2004_present",
"past_12_months",
"past_30_days",
"past_4_hours",
"past_5_years",
"past_7_days",
"past_90_days",
"past_day",
"past_hour"
],
"type": "string",
"default": "past_12_months",
"description": "time window. Each response reports its own bucket size in `granularity`: past_30_days and past_90_days return a daily series, past_12_months and past_5_years weekly, windows under a day hourly"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 8 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "150000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/enrich",
"tags": [
"enrichment",
"company-data",
"tech-stack",
"socials",
"firmographics"
],
"mimeType": "application/json",
"description": "Company domain enrichment. Firmographics, tech-stack detection, social profiles, and metadata for a company domain — a keyless one-call enrichment gateway.",
"serviceName": "Company Domain Enrichment"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"domain": "stripe.com"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"type": "enrichment",
"domain": "stripe.com",
"company": {
"name": "Stripe"
},
"socials": {
"twitter": "..."
},
"techStack": [
"Stripe",
"React"
]
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"domain"
],
"properties": {
"domain": {
"type": "string"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 9 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/stackoverflow",
"tags": [
"stackoverflow",
"programming",
"qa",
"developer",
"code"
],
"mimeType": "application/json",
"description": "Stack Overflow Q&A. Programming question and answer search with scores, accepted-answer flags, tags, and answer bodies via the Stack Exchange API.",
"serviceName": "Stack Overflow Q&A Search"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "asyncio gather",
"tag": "python",
"mode": "search"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"type": "so_question",
"score": 12,
"title": "...",
"answers": [],
"isAnswered": true
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"anyOf": [
{
"required": [
"q"
]
},
{
"required": [
"ids"
]
}
],
"required": [],
"properties": {
"q": {
"type": "string"
},
"ids": {
"type": "string",
"description": "comma list of question ids (mode=question)"
},
"tag": {
"type": "string",
"description": "optional tag filter"
},
"mode": {
"enum": [
"search",
"question"
],
"type": "string"
},
"maxItems": {
"type": "string",
"default": "20"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 10 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/trend",
"tags": [
"google-trends",
"trends",
"keyword-research",
"seo",
"search-volume"
],
"mimeType": "application/json",
"description": "Google Trends interest over time for a keyword. Returns Google Trends search interest as a dated series indexed 0-100: weekly points across the default past 12 months, daily points for 30- and 90-day windows, and windows from the past hour back to 2004, with optional country targeting. For keyword trend analysis, search demand seasonality, and SEO keyword research.",
"serviceName": "Google Trends Interest Over Time"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"geo": "US",
"keyword": "bitcoin"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"geo": "US",
"type": "google_trend",
"stale": false,
"points": 53,
"series": [
{
"date": "2025-08-31",
"value": 26,
"dateTo": "2025-09-06",
"partial": false
},
{
"date": "2026-08-30",
"value": 21,
"dateTo": "2026-09-02",
"partial": true
}
],
"keyword": "bitcoin",
"queriedAt": "2026-09-02T19:38:34Z",
"timeframe": "past_12_months",
"dataSource": "primary",
"granularity": "week"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"keyword"
],
"properties": {
"geo": {
"type": "string",
"description": "ISO-3166 alpha-2 country code, e.g. US, GB, DE, JP (213 countries supported); omit for worldwide"
},
"keyword": {
"type": "string",
"description": "the search term to chart"
},
"timeframe": {
"enum": [
"2004_present",
"past_12_months",
"past_30_days",
"past_4_hours",
"past_5_years",
"past_7_days",
"past_90_days",
"past_day",
"past_hour"
],
"type": "string",
"default": "past_12_months",
"description": "time window. Each response reports its own bucket size in `granularity`: past_30_days and past_90_days return a daily series, past_12_months and past_5_years weekly, windows under a day hourly"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 11 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/market-sentiment",
"tags": [
"fear-greed",
"market-sentiment",
"vix",
"crypto",
"stocks"
],
"mimeType": "application/json",
"description": "Market fear & greed index. Aggregated investor sentiment from CNN Fear & Greed, the crypto Fear & Greed index, and the VIX volatility gauge.",
"serviceName": "Market Fear & Greed Index"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"asset_class": "all"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"vix": {
"level": "normal",
"value": 16.78,
"source": "cboe_vix"
},
"type": "market_sentiment",
"crypto": {
"label": "Extreme Fear",
"score": 23,
"source": "alternative.me",
"trend7d": {
"change": -5
}
},
"stocks": {
"label": "fear",
"score": 37.26,
"source": "cnn"
},
"assetClass": "all"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"asset_class": {
"enum": [
"crypto",
"stocks",
"all"
],
"type": "string",
"default": "all"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 12 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/whois-bulk",
"tags": [
"whois",
"bulk",
"domain",
"registrar",
"batch"
],
"mimeType": "application/json",
"description": "Bulk WHOIS lookup. Registrar, dates, and nameservers for up to 10 domains in a single batch call.",
"serviceName": "Bulk WHOIS Lookup"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"domains": "example.com,google.com,github.com"
}
},
"output": {
"type": "json",
"example": {
"count": 2,
"items": [
{
"type": "whois",
"whois": {
"registrar": "..."
},
"domain": "example.com"
},
{
"type": "whois",
"whois": {
"registrar": "MarkMonitor Inc."
},
"domain": "google.com"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"domains"
],
"properties": {
"domains": {
"type": "string",
"description": "comma list of up to 10 domains"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 13 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/dns-propagation",
"tags": [
"dns",
"propagation",
"resolvers",
"nameservers",
"domain"
],
"mimeType": "application/json",
"description": "DNS propagation checker. Compares a DNS record across public resolvers (Google, Cloudflare, Quad9, OpenDNS) to spot propagation lag or split-horizon answers.",
"serviceName": "DNS Propagation Checker"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"domain": "example.com",
"record_type": "A"
}
},
"output": {
"type": "json",
"example": {
"count": 4,
"items": [
{
"records": [
"93.184.216.34"
],
"resolver": "google",
"consistent": true,
"recordType": "A",
"resolverIp": "8.8.8.8"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"domain"
],
"properties": {
"domain": {
"type": "string"
},
"record_type": {
"enum": [
"A",
"AAAA",
"CNAME",
"MX",
"NS",
"TXT"
],
"type": "string",
"default": "A"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 14 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/interest-by-region",
"tags": [
"google-trends",
"trends",
"interest-by-region",
"regional",
"geo"
],
"mimeType": "application/json",
"description": "Google Trends interest by region for a keyword. Returns the subregional breakdown of Google Trends search interest inside a country - by state, province, or region - each ranked 0-100 relative to the strongest region. For regional demand mapping, geo targeting, and finding where a keyword over-indexes before spending on it.",
"serviceName": "Google Trends Interest by Region"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"geo": "US",
"keyword": "bitcoin"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"geo": "US",
"type": "google_trends_interest_by_region",
"stale": false,
"keyword": "bitcoin",
"regions": [
{
"value": 100,
"region": "Wyoming",
"regionCode": "US-WY"
},
{
"value": 47,
"region": "Nevada",
"regionCode": "US-NV"
}
],
"queriedAt": "2026-09-02T19:38:34Z",
"timeframe": "past_12_months",
"dataSource": "primary"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"keyword",
"geo"
],
"properties": {
"geo": {
"type": "string",
"description": "ISO-3166 alpha-2 country code, e.g. US, GB, DE, JP (213 countries supported)"
},
"keyword": {
"type": "string",
"description": "the search term"
},
"timeframe": {
"enum": [
"2004_present",
"past_12_months",
"past_30_days",
"past_4_hours",
"past_5_years",
"past_7_days",
"past_90_days",
"past_day",
"past_hour"
],
"type": "string",
"default": "past_12_months",
"description": "time window. Each response reports its own bucket size in `granularity`: past_30_days and past_90_days return a daily series, past_12_months and past_5_years weekly, windows under a day hourly"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 15 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/domain-info",
"tags": [
"whois",
"dns",
"domain",
"registrar",
"nameservers"
],
"mimeType": "application/json",
"description": "Domain WHOIS and DNS lookup. Registrar, creation and expiry dates, nameservers, and full DNS records (A, AAAA, MX, NS, TXT, CNAME) for a domain.",
"serviceName": "Domain WHOIS & DNS Lookup"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"domain": "example.com"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"dns": {
"A": [
"93.184.216.34"
]
},
"type": "domain_info",
"whois": {
"registrar": "..."
},
"domain": "example.com"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"domain"
],
"properties": {
"domain": {
"type": "string"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 16 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/yield-pools",
"tags": [
"yield",
"apy",
"defi",
"yield-farming",
"defillama"
],
"mimeType": "application/json",
"description": "DeFi yield and APY across pools. Returns the top yield-farming pools via DefiLlama with current APY, base and reward APY split, TVL, chain, and project, filterable by chain, project, symbol, stablecoin-only, minimum TVL, and minimum APY. For yield discovery and comparing APY across protocols. Keyless.",
"serviceName": "DeFi Yield & APY Pools"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "Ethereum",
"minTvl": "5000000",
"maxItems": "10",
"stablecoin": "true"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"apy": 2.284,
"type": "yield_pool",
"chain": "Ethereum",
"ilRisk": "no",
"symbol": "STETH",
"tvlUsd": 15508339626,
"apyBase": 2.284,
"project": "lido",
"exposure": "single",
"stablecoin": false
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"chain": {
"type": "string",
"description": "e.g. Ethereum|Arbitrum|Solana"
},
"minApy": {
"type": "string",
"default": "0"
},
"minTvl": {
"type": "string",
"default": "1000000"
},
"symbol": {
"type": "string",
"description": "pool symbol substring, e.g. USDC|ETH"
},
"project": {
"type": "string",
"description": "e.g. aave-v3|lido|uniswap-v3"
},
"maxItems": {
"type": "string",
"default": "25"
},
"stablecoin": {
"type": "string",
"description": "true -> stablecoin pools only"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 17 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/recalls",
"tags": [
"consumer-recalls",
"cpsc",
"product-safety",
"nhtsa",
"government"
],
"mimeType": "application/json",
"description": "Consumer product recalls. A normalized multi-agency recall feed spanning FDA, CPSC, and NHTSA — product, reason, company, classification, and severity.",
"serviceName": "Consumer Product Recalls"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "salmonella",
"limit": "10",
"agency": "all"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"date": "2026-05-12",
"type": "recall",
"agency": "FDA",
"reason": "undeclared milk",
"status": "Ongoing",
"company": "...",
"product": "...",
"severity": "high",
"recallNumber": "F-1234-2026",
"classification": "Class I"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"q": {
"type": "string",
"description": "search text. For agency=nhtsa pass '<make> <model> <year>'"
},
"limit": {
"type": "string",
"default": "25"
},
"agency": {
"enum": [
"fda",
"cpsc",
"nhtsa",
"all"
],
"type": "string",
"default": "all",
"description": "usda/FSIS is unavailable (agency blocks bots)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 18 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "80000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/lit-review",
"tags": [
"literature-review",
"citations",
"cited-by",
"systematic-review",
"research-map"
],
"mimeType": "application/json",
"description": "Literature review map in one call. Give a seed paper (DOI, arXiv id, OpenAlex id, or PMID) or a topic query and get one structured result: the seed's references, its cited-by list (most-cited first), and semantically related work, deduplicated into one uniform table with title, authors, year, venue, DOI, and citation count. Collapses search, citation lookup, and related-paper discovery into a single call. Keyless.",
"serviceName": "Literature Review Map"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"doi": "10.48550/arXiv.1706.03762",
"maxItems": "10"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"seed": {
"year": 2017,
"title": "Attention Is All You Need",
"citationCount": 181057
},
"type": "lit_review",
"counts": {
"total": 30,
"citedBy": 10,
"related": 10,
"references": 10
},
"citedBy": [
{
"year": 2019,
"title": "BERT",
"relation": "cited_by"
}
],
"references": [
{
"year": 2014,
"title": "Neural Machine Translation",
"relation": "reference"
}
]
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"anyOf": [
{
"required": [
"id"
]
},
{
"required": [
"doi"
]
},
{
"required": [
"q"
]
}
],
"required": [],
"properties": {
"q": {
"type": "string",
"description": "topic query (seed = top hit); use this OR id/doi"
},
"id": {
"type": "string",
"description": "seed paper: arXiv id, DOI, OpenAlex id, or PMID"
},
"doi": {
"type": "string",
"description": "alias for id (DOI form)"
},
"maxItems": {
"type": "string",
"default": "10",
"description": "max nodes per section (1-25)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 19 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/topic-search",
"tags": [
"topic-search",
"field-search",
"research-field",
"paper-discovery",
"openalex-topics"
],
"mimeType": "application/json",
"description": "Field and topic search for research papers. Give a broad field name or short phrase (like 'crispr' or 'exercise science') and get a coherent, taxonomy-grounded seed cluster: the field is resolved against the OpenAlex topics taxonomy, then the cluster returns the top-cited plus recent-influential works, each with title, authors, year, venue, citation count, and DOI. Solves the broad-term entry problem dense semantic search fails on. Keyless.",
"serviceName": "Field & Topic Search"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "exercise science",
"maxItems": "12"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"mode": "topic",
"type": "topic_search",
"count": 12,
"query": "exercise science",
"results": [
{
"type": "paper",
"year": 1998,
"title": "ACSM Position Stand...",
"clusterRole": "top_cited",
"citationCount": 3056
}
],
"routing": {
"wordCount": 2,
"confidence": 0.32,
"isQuestion": false,
"matchedVia": "works-subfield-modal",
"groundingLevel": "subfield"
},
"grounding": {
"id": "2732",
"name": "Orthopedics and Sports Medicine",
"field": "Medicine",
"level": "subfield",
"subfield": "Orthopedics and Sports Medicine"
},
"candidateTopics": [
{
"id": "T11246",
"name": "Sports injuries and prevention",
"field": "Medicine",
"share": 0.16,
"votes": 4
}
]
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"q"
],
"properties": {
"q": {
"type": "string",
"description": "a field, discipline, or short topic phrase (e.g. 'crispr', 'exercise science')"
},
"maxItems": {
"type": "string",
"default": "12",
"description": "cluster size cap (1-25)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 20 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/stablecoins",
"tags": [
"stablecoin",
"stablecoins",
"defi",
"crypto",
"usdc"
],
"mimeType": "application/json",
"description": "Stablecoin supply data. Returns circulating supply for stablecoins broken down across chains via DefiLlama, filterable by peg type and by collateral mechanism, so you can compare fiat-backed against crypto-backed and algorithmic stablecoins. For stablecoin market share, depeg watch, and chain-level supply tracking. Keyless.",
"serviceName": "Stablecoin Supply Data"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"maxItems": "10"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"name": "Tether",
"type": "stablecoin",
"price": 0.999,
"chains": [
"Ethereum",
"Tron",
"BSC"
],
"symbol": "USDT",
"pegType": "peggedUSD",
"circulating": 186345714276.06,
"pegMechanism": "fiat-backed"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"q": {
"type": "string",
"description": "name/symbol substring filter"
},
"pegType": {
"type": "string",
"description": "e.g. peggedUSD|peggedEUR"
},
"maxItems": {
"type": "string",
"default": "25"
},
"mechanism": {
"type": "string",
"description": "fiat-backed|crypto-backed|algorithmic"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 21 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/smart-search",
"tags": [
"semantic-search",
"smart-search",
"hybrid-search",
"question-search",
"paper-search"
],
"mimeType": "application/json",
"description": "Smart, auto-routed research paper search. A broad field term is grounded against the OpenAlex taxonomy and returned as a coherent field cluster; a natural-language question runs hybrid retrieval over OpenAlex and Semantic Scholar with reciprocal rank fusion and a SPECTER2 embedding rerank. The response exposes the routing decision, and each paper carries title, authors, year, venue, citation count, DOI, and a relevance score. Keyless.",
"serviceName": "Smart Research Search"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "does zone 2 training improve mitochondrial density in older adults",
"maxItems": "15"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"mode": "hybrid",
"type": "smart_search",
"count": 15,
"query": "does zone 2 training improve mitochondrial density in older adults",
"results": [
{
"type": "paper",
"year": 2019,
"score": 0.0163,
"title": "Exercise training and mitochondrial biogenesis...",
"citationCount": 210,
"specterCosine": 0.71
}
],
"routing": {
"fusion": "openalex-only",
"s2Hits": 0,
"embedded": 18,
"reranked": true,
"wordCount": 10,
"isQuestion": true,
"openAlexHits": 30
},
"grounding": null
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"q"
],
"properties": {
"q": {
"type": "string",
"description": "a field term OR a natural-language research question"
},
"rerank": {
"type": "string",
"default": "true",
"description": "apply the SPECTER2 semantic rerank on the hybrid path"
},
"maxItems": {
"type": "string",
"default": "15",
"description": "max results (1-40)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 22 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/email-validate",
"tags": [
"email",
"email-validation",
"mx-records",
"disposable-email",
"lead-gen"
],
"mimeType": "application/json",
"description": "Email validation and email list cleaning. Checks each email address for RFC syntax, a live MX record lookup returning the real mail hosts, disposable-domain detection, role-account flags (info@, sales@, noreply@), and a free-provider flag, rolled into a per-address ok/risky/invalid verdict with reasons. Batch up to 25 email addresses per call. Domain-level DNS only, no SMTP mailbox probe. Keyless.",
"serviceName": "Email Validation API"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"emails": "[email protected],[email protected]"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"type": "email_validation",
"email": "[email protected]",
"domain": "mailinator.com",
"mxFound": true,
"reasons": [
"disposable/throwaway domain",
"role account (info@)"
],
"verdict": "risky",
"localPart": "info",
"mxRecords": [
{
"host": "mail2.mailinator.com",
"priority": 10
}
],
"normalized": "[email protected]",
"roleAccount": true,
"syntaxValid": true,
"freeProvider": false,
"disposableDomain": true
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"emails"
],
"properties": {
"emails": {
"type": "string",
"description": "comma-separated email addresses, up to 25 per call (a single address works too)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 23 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/permits",
"tags": [
"building-permits",
"construction",
"municipal",
"real-estate",
"government"
],
"mimeType": "application/json",
"description": "Building permit records. Construction and building permits across Chicago, NYC, Seattle, and San Francisco — type, status, address, cost, and issue date.",
"serviceName": "Building Permit Records"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"city": "sf",
"maxItems": "5",
"date_range": "2024-01-01,2026-06-21",
"permit_type": "kitchen"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"city": "San Francisco",
"type": "permit",
"source": "sf",
"status": "issued",
"address": "930 Sutter St",
"permitId": "202606042504",
"issuedDate": "2026-06-18",
"permitType": "additions alterations or repairs",
"estimatedCost": 40000
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"city"
],
"properties": {
"city": {
"enum": [
"chicago",
"nyc",
"seattle",
"sf"
],
"type": "string"
},
"address": {
"type": "string",
"description": "full-text match on address"
},
"maxItems": {
"type": "string",
"default": "25"
},
"date_range": {
"type": "string",
"description": "YYYY-MM-DD,YYYY-MM-DD (from,to)"
},
"permit_type": {
"type": "string",
"description": "full-text match on permit type/description"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 24 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/token-price",
"tags": [
"price",
"crypto",
"token-price",
"market-data",
"coinpaprika"
],
"mimeType": "application/json",
"description": "Crypto token price and market data. Returns the live price of one or many tokens by coin id or ticker symbol, in a chosen vs-currency, with market cap, 24-hour volume, and 24-hour price change. For crypto price lookups, portfolio valuation, and market data feeds. Keyless, via CoinPaprika.",
"serviceName": "Crypto Token Price Data"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"vs": "usd",
"ids": "bitcoin,ethereum"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"id": "bitcoin",
"ath": 126080,
"name": "Bitcoin",
"type": "token_price",
"price": 63533,
"symbol": "BTC",
"change7d": -0.71,
"change24h": -0.82,
"marketCap": 1276497335142,
"volume24h": 16266799969,
"marketCapRank": 1
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"ids"
],
"properties": {
"vs": {
"type": "string",
"default": "usd",
"description": "quote currency (usd only)"
},
"ids": {
"type": "string",
"description": "comma list of coin ids or symbols (e.g. bitcoin,ethereum or btc,eth)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 25 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/fda",
"tags": [
"fda",
"drug-recalls",
"food-safety",
"health",
"government"
],
"mimeType": "application/json",
"description": "FDA recalls and adverse events. Drug, device, and food recall and adverse-event records from openFDA with classification, recalling firm, and reason.",
"serviceName": "FDA Recalls & Adverse Events"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"type": "drug",
"report": "recall",
"search": "reason_for_recall:contamination"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"type": "fda_recall",
"status": "Ongoing",
"category": "drug",
"recallingFirm": "...",
"classification": "Class II",
"reasonForRecall": "..."
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"type": {
"enum": [
"drug",
"device",
"food"
],
"type": "string",
"default": "drug"
},
"limit": {
"type": "string",
"default": "20"
},
"report": {
"enum": [
"recall",
"event"
],
"type": "string",
"default": "recall"
},
"search": {
"type": "string",
"description": "OpenFDA Lucene query or plain text"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 26 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/defi-tvl",
"tags": [
"tvl",
"defi",
"protocol",
"defillama",
"crypto"
],
"mimeType": "application/json",
"description": "DeFi TVL for protocols and chains. Returns total value locked per DeFi protocol or per chain via DefiLlama, with category, supported chains, and TVL change over time, filterable by category or chain. For DeFi protocol screening, chain-level TVL comparison, and tracking where liquidity is moving. Keyless.",
"serviceName": "DeFi TVL & Protocol Data"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"mode": "protocols",
"category": "Lending",
"maxItems": "10"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"tvl": 13045749087,
"url": "https://aave.com",
"name": "Aave",
"type": "defi_protocol",
"chains": [
"Ethereum",
"Polygon"
],
"symbol": "AAVE",
"category": "Lending",
"change7d": 1.2
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"q": {
"type": "string",
"description": "name substring filter"
},
"mode": {
"enum": [
"protocols",
"chains"
],
"type": "string",
"default": "protocols"
},
"chain": {
"type": "string",
"description": "protocol must touch this chain"
},
"category": {
"type": "string",
"description": "exact category, e.g. Dexes|Lending|CDP"
},
"maxItems": {
"type": "string",
"default": "25"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 27 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/paper-details",
"tags": [
"citation-lookup",
"citations",
"references",
"cited-by",
"doi-lookup"
],
"mimeType": "application/json",
"description": "Citation lookup and reference list for a paper. Given a DOI, arXiv id, OpenAlex id, or PMID, returns its references (the works it cites) and its cited-by list (recent works that cite it), plus full metadata and citation count — for bibliography building and citation lookup. Keyless via OpenAlex and Semantic Scholar.",
"serviceName": "Citations, References, Cited-By"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"doi": "10.48550/arXiv.1706.03762"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"doi": "10.48550/arxiv.1706.03762",
"type": "paper_details",
"year": 2017,
"title": "Attention Is All You Need",
"citedBy": [
{
"year": 2019,
"title": "BERT: Pre-training...",
"citedByCount": 90000
}
],
"references": [
{
"doi": "...",
"year": 2014,
"title": "Neural Machine Translation..."
}
],
"citationCount": 181057,
"fieldsOfStudy": [
"Computer Science"
],
"referenceCount": 41
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"anyOf": [
{
"required": [
"id"
]
},
{
"required": [
"doi"
]
}
],
"required": [],
"properties": {
"id": {
"type": "string",
"description": "arXiv id, DOI, OpenAlex id, or PMID"
},
"doi": {
"type": "string",
"description": "alias for id (DOI form)"
},
"ref_limit": {
"type": "string",
"default": "25",
"description": "max references (0-100)"
},
"cite_limit": {
"type": "string",
"default": "25",
"description": "max citing works (0-100)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 28 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/nutrition",
"tags": [
"usda",
"nutrition",
"food-data",
"health",
"dietary"
],
"mimeType": "application/json",
"description": "Food nutrition lookup. Calories, macros, and micronutrients for any food from the USDA FoodData Central database.",
"serviceName": "USDA Nutrition Lookup"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"query": "cheddar cheese",
"pageSize": "5"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"type": "food",
"dataType": "Branded",
"nutrients": {
"Energy": {
"unit": "KCAL",
"value": 403
},
"Protein": {
"unit": "G",
"value": 24
}
},
"brandOwner": "...",
"description": "CHEDDAR"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"query"
],
"properties": {
"query": {
"type": "string",
"description": "food name / search text"
},
"dataType": {
"type": "string",
"description": "e.g. Branded,Foundation,SR Legacy"
},
"pageSize": {
"type": "string",
"default": "10"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 29 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/gas-oracle",
"tags": [
"gas",
"gas-price",
"ethereum",
"gwei",
"fees"
],
"mimeType": "application/json",
"description": "Ethereum gas price oracle. Returns the current Ethereum gas price as an EIP-1559 base fee plus priority-fee estimates across five confidence tiers, all in gwei, so an agent can price a transaction before it signs one. Ethereum mainnet only. Keyless, via Blocknative.",
"serviceName": "Ethereum Gas Price Oracle"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET"
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"type": "gas_oracle",
"unit": "gwei",
"chain": "ethereum",
"estimates": [
{
"price": 0.21,
"confidence": 99,
"maxFeePerGas": 0.32,
"maxPriorityFeePerGas": 0.098
}
],
"baseFeePerGas": 0.111
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 30 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/related-papers",
"tags": [
"literature-review",
"related-papers",
"similar-papers",
"paper-recommendations",
"systematic-review"
],
"mimeType": "application/json",
"description": "Literature review and related-paper discovery. Given a seed paper (arXiv id, DOI, or OpenAlex id) or a topic query, returns semantically similar and recommended scholarly papers to expand a reading list or systematic review, via Semantic Scholar recommendations with an OpenAlex related-works fallback. Keyless.",
"serviceName": "Related Paper Discovery"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"doi": "10.48550/arXiv.1706.03762",
"maxItems": "10"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"doi": "10.18653/v1/n19-1423",
"url": "https://doi.org/...",
"type": "related_paper",
"year": 2019,
"title": "BERT: Pre-training of Deep Bidirectional Transformers...",
"venue": "NAACL",
"authors": [
"Jacob Devlin"
],
"relatedBy": "openalex",
"citationCount": 90000
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"anyOf": [
{
"required": [
"id"
]
},
{
"required": [
"doi"
]
},
{
"required": [
"q"
]
}
],
"required": [],
"properties": {
"q": {
"type": "string",
"description": "query (alternative to id — relevance search)"
},
"id": {
"type": "string",
"description": "paper arXiv id, DOI, or OpenAlex id"
},
"doi": {
"type": "string",
"description": "alias for id (DOI form)"
},
"maxItems": {
"type": "string",
"default": "15",
"description": "1-50"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 31 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/trending-coins",
"tags": [
"crypto",
"trending",
"web3",
"market-data",
"coingecko"
],
"mimeType": "application/json",
"description": "Trending crypto coins. The coins most searched on CoinGecko right now, with rank, price, and market-cap rank.",
"serviceName": "Trending Crypto Coins"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"maxItems": "7"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"id": "tensor",
"name": "Tensor",
"rank": 1,
"type": "trending_coin",
"symbol": "TNSR",
"priceUsd": 0.045,
"change24hUsd": 3.1,
"marketCapRank": 939
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"maxItems": {
"type": "string",
"default": "15",
"description": "cap 15"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 32 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/papers",
"tags": [
"academic-search",
"paper-search",
"arxiv-api",
"pubmed-search",
"research-paper-api"
],
"mimeType": "application/json",
"description": "Academic and scientific paper search API. Search research papers and scholarly literature across arXiv, PubMed, OpenAlex, Crossref, and Semantic Scholar in one call, deduplicated into a ranked result set: title, authors, year, venue, abstract, citation count, DOI, and direct PDF link. Query by keyword or restrict to one source; filter by year range; sort by relevance, recency, or citations. Keyless.",
"serviceName": "Academic Paper Search"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "transformer attention",
"sort": "citations",
"source": "all",
"maxItems": "10"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"doi": "10.48550/arxiv.1706.03762",
"url": "https://doi.org/...",
"type": "paper",
"year": 2017,
"title": "Attention Is All You Need",
"venue": "NeurIPS",
"pdfUrl": "https://arxiv.org/pdf/1706.03762",
"source": "openalex",
"authors": [
"Ashish Vaswani"
],
"sources": [
"openalex",
"semanticscholar"
],
"abstract": "The dominant sequence transduction models...",
"citationCount": 181057
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"q"
],
"properties": {
"q": {
"type": "string",
"description": "search query / keywords"
},
"sort": {
"enum": [
"relevance",
"recency",
"citations"
],
"type": "string",
"default": "relevance"
},
"source": {
"enum": [
"all",
"arxiv",
"pubmed",
"openalex",
"crossref",
"semanticscholar"
],
"type": "string",
"default": "all"
},
"year_to": {
"type": "string",
"description": "latest publication year (inclusive)"
},
"maxItems": {
"type": "string",
"default": "20",
"description": "1-50"
},
"year_from": {
"type": "string",
"description": "earliest publication year (inclusive)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 33 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/author-search",
"tags": [
"author-search",
"researcher-profile",
"researcher-lookup",
"h-index",
"affiliation"
],
"mimeType": "application/json",
"description": "Author and researcher profile search. An author name returns matching researchers with current affiliation, publication count, total citations, h-index and i10-index, and their most-cited papers — for author lookup, disambiguation, and citation-metrics. Keyless via OpenAlex.",
"serviceName": "Author & Researcher Search"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"name": "Yoshua Bengio",
"maxItems": "3"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"name": "Yoshua Bengio",
"type": "author",
"hIndex": 184,
"i10Index": 600,
"topWorks": [
{
"year": 2015,
"title": "Deep Learning",
"citedByCount": 81540
}
],
"openAlexId": "https://openalex.org/A...",
"worksCount": 1284,
"affiliations": [
{
"name": "Mila",
"country": "CA"
}
],
"citedByCount": 453326
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"name"
],
"properties": {
"name": {
"type": "string",
"description": "author name to search"
},
"maxItems": {
"type": "string",
"default": "10",
"description": "1-25 candidate authors"
},
"top_works": {
"type": "string",
"default": "5",
"description": "top papers per author (0-25)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 34 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "80000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/serp-read",
"tags": [
"search",
"web-search",
"serp",
"answer-with-sources",
"web-reader"
],
"mimeType": "application/json",
"description": "Web search plus page reading in one call: answer with sources. Runs a web search, scrapes the top results, and returns the ranked search results together with each page's content as clean LLM-ready markdown, so an agent gets the SERP AND the underlying text without a second round of scrape calls. Per-page fetch errors are reported honestly per URL.",
"serviceName": "Web Search + Page Reader"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "how does x402 payment protocol work",
"fetch_top": "3"
}
},
"output": {
"type": "json",
"example": {
"count": 2,
"items": [
{
"type": "serp_read",
"query": "how does x402 payment protocol work",
"results": [
{
"url": "https://example.com/x402",
"rank": 1,
"type": "search_result",
"title": "x402 docs",
"snippet": "HTTP 402..."
}
],
"resultCount": 5
},
{
"url": "https://example.com/x402",
"rank": 1,
"type": "page_extract",
"title": "x402 docs",
"markdown": "# x402\nThe payment-required protocol...",
"wordCount": 900,
"httpStatus": 200,
"markdownTruncated": false
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"q"
],
"properties": {
"q": {
"type": "string",
"description": "search query"
},
"mode": {
"enum": [
"web",
"news"
],
"type": "string",
"default": "web"
},
"engine": {
"type": "string",
"default": "auto",
"description": "search backend: auto (recommended) or yahoo/yandex (web); bing (news)"
},
"region": {
"type": "string",
"default": "us-en",
"description": "locale, e.g. us-en, uk-en, de-de"
},
"maxChars": {
"type": "string",
"default": "8000",
"description": "max markdown chars per fetched page"
},
"fetch_top": {
"type": "string",
"default": "3",
"description": "how many top results to fetch and extract, cap 5"
},
"timelimit": {
"enum": [
"d",
"w",
"m",
"y"
],
"type": "string",
"description": "restrict to past day/week/month/year"
},
"safesearch": {
"enum": [
"on",
"moderate",
"off"
],
"type": "string",
"default": "moderate"
},
"num_results": {
"type": "string",
"default": "5",
"description": "ranked results to return, cap 25"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 35 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "80000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/website-audit",
"tags": [
"seo",
"website-audit",
"performance",
"accessibility",
"meta-tags"
],
"mimeType": "application/json",
"description": "Instant website SEO audit. On-page SEO, performance, and accessibility snapshot for any URL — title, meta tags, headings, links, image alt, load time, and an issues list with score.",
"serviceName": "Website SEO & Perf Audit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"url": "https://example.com"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"url": "https://example.com",
"type": "website_audit",
"score": 84,
"issues": [
"missing meta description"
]
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"url"
],
"properties": {
"url": {
"type": "string",
"description": "page URL"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 36 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/github",
"tags": [
"github",
"repository",
"open-source",
"developer",
"code"
],
"mimeType": "application/json",
"description": "GitHub data. Repository stats, user profiles, and code-search results (stars, forks, language, topics, issues) via the GitHub REST API.",
"serviceName": "GitHub Repo & User Data"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"mode": "repo",
"repos": "microsoft/vscode"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"type": "repository",
"stars": 186000,
"fullName": "microsoft/vscode",
"language": "TypeScript"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"anyOf": [
{
"required": [
"repos"
]
},
{
"required": [
"q"
]
},
{
"required": [
"usernames"
]
}
],
"required": [],
"properties": {
"q": {
"type": "string",
"description": "search query (mode=search)"
},
"mode": {
"enum": [
"repo",
"search",
"user"
],
"type": "string",
"description": "what to fetch"
},
"repos": {
"type": "string",
"description": "comma list of owner/name (mode=repo)"
},
"maxItems": {
"type": "string",
"default": "30"
},
"usernames": {
"type": "string",
"description": "comma list (mode=user)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 37 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/scrape",
"tags": [
"scrape",
"scraper",
"web-scraping",
"extract",
"markdown"
],
"mimeType": "application/json",
"description": "Scrape any web page to clean markdown. A keyless web scraper that converts a single URL into LLM-ready markdown plus structured metadata (title, headings, links, word count), so an agent can read a page without running a browser. A per-call alternative to Firecrawl's scrape endpoint, with no API key and no account. Single page per call, not a site crawler.",
"serviceName": "Web Scraper - Page to Markdown"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"url": "https://example.com"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"url": "https://example.com",
"type": "scrape",
"title": "Example",
"headings": [
{
"text": "Example",
"level": 1
}
],
"markdown": "# Example",
"wordCount": 42
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"url"
],
"properties": {
"url": {
"type": "string",
"description": "page URL to scrape"
},
"maxChars": {
"type": "string",
"default": "40000",
"description": "markdown cap"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 38 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "40000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/paper-fulltext",
"tags": [
"full-text",
"open-access",
"pdf-retrieval",
"paper-pdf",
"fulltext-api"
],
"mimeType": "application/json",
"description": "Full text and open-access PDF retrieval for a paper. Given an arXiv id, DOI, OpenAlex id, PMID, or PMCID, returns the readable body split into sections (introduction, methods, results) plus the open-access PDF location: arXiv via ar5iv, biomedical via Europe PMC, OA locations via OpenAlex for the rest. The 'now read it' call after a paper search. Keyless.",
"serviceName": "Open-Access Paper Full Text"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"id": "1706.03762"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"text": "1 Introduction\nRecurrent neural networks...",
"type": "paper_fulltext",
"arxivId": "1706.03762",
"sections": [
{
"text": "Recurrent neural networks, long short-term memory...",
"heading": "1 Introduction"
}
],
"sourceUrl": "https://ar5iv.labs.arxiv.org/html/1706.03762",
"openAccess": true,
"fulltextSource": "ar5iv"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"anyOf": [
{
"required": [
"id"
]
},
{
"required": [
"doi"
]
}
],
"required": [],
"properties": {
"id": {
"type": "string",
"description": "arXiv id, DOI, OpenAlex id, PMID, or PMCID"
},
"doi": {
"type": "string",
"description": "alias for id (DOI form)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 39 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/sec-edgar",
"tags": [
"sec",
"edgar",
"filings",
"financial-filings",
"stocks"
],
"mimeType": "application/json",
"description": "SEC filings full-text search. Searches SEC EDGAR filings - 10-K, 10-Q, 8-K, and every other form type - by keyword, company name, ticker, or CIK, with date-range filtering, returning company, form type, filing date, accession number, and a direct document link. For SEC filings research and disclosure monitoring. Keyless.",
"serviceName": "SEC EDGAR Filing Search"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "artificial intelligence",
"type": "10-K"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"form": "10-K",
"type": "sec_filing",
"company": "APPLE INC",
"fileUrl": "https://www.sec.gov/Archives/edgar/data/320193/x/aapl.htm",
"filedAt": "2023-11-03",
"accessionNo": "0000320193-23-000106"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"anyOf": [
{
"required": [
"q"
]
},
{
"required": [
"company"
]
},
{
"required": [
"cik"
]
}
],
"required": [],
"properties": {
"q": {
"type": "string",
"description": "full-text query"
},
"cik": {
"type": "string",
"description": "SEC CIK"
},
"type": {
"type": "string",
"description": "form type, e.g. 10-K|10-Q|8-K"
},
"company": {
"type": "string",
"description": "entity name"
},
"maxItems": {
"type": "string",
"default": "20"
},
"dateRange": {
"type": "string",
"description": "YYYY-MM-DD..YYYY-MM-DD"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 40 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/hackernews",
"tags": [
"hackernews",
"tech-news",
"startup",
"developer",
"ycombinator"
],
"mimeType": "application/json",
"description": "Hacker News feed. Top, new, and best front-page stories plus full-text story search — titles, scores, comment counts, and author for tech and startup news.",
"serviceName": "Hacker News Stories & Search"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "ai agents",
"mode": "search"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"url": "...",
"type": "hn_hit",
"title": "...",
"points": 420,
"numComments": 99
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"anyOf": [
{
"required": [
"q"
]
},
{
"required": [
"mode"
],
"properties": {
"mode": {
"enum": [
"top",
"new",
"best"
]
}
}
}
],
"required": [],
"properties": {
"q": {
"type": "string",
"description": "query (mode=search)"
},
"mode": {
"enum": [
"search",
"top",
"new",
"best"
],
"type": "string"
},
"maxItems": {
"type": "string",
"default": "20"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 41 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "100000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/serp-batch",
"tags": [
"search",
"web-search",
"serp",
"batch-search",
"bulk"
],
"mimeType": "application/json",
"description": "Bulk web search: up to 5 search queries in a single call, each returning ranked title, URL, and snippet, with the same locale, freshness, and news filters as the single-query web search. One paid call instead of five for research fan-out.",
"serviceName": "Bulk Web Search"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"queries": "python asyncio tutorial|rust tokio tutorial"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"type": "serp_batch",
"query": "python asyncio tutorial",
"results": [
{
"url": "https://example.com/asyncio",
"rank": 1,
"type": "search_result",
"title": "Async IO in Python",
"snippet": "A complete walkthrough..."
}
],
"resultCount": 10
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"queries"
],
"properties": {
"mode": {
"enum": [
"web",
"news"
],
"type": "string",
"default": "web"
},
"engine": {
"type": "string",
"default": "auto",
"description": "search backend: auto (recommended) or yahoo/yandex (web); bing (news)"
},
"region": {
"type": "string",
"default": "us-en",
"description": "locale, e.g. us-en, uk-en, de-de"
},
"queries": {
"type": "string",
"description": "up to 5 search queries separated by '|'"
},
"timelimit": {
"enum": [
"d",
"w",
"m",
"y"
],
"type": "string",
"description": "restrict to past day/week/month/year"
},
"safesearch": {
"enum": [
"on",
"moderate",
"off"
],
"type": "string",
"default": "moderate"
},
"num_results": {
"type": "string",
"default": "10",
"description": "max results per query, cap 25"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 42 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/serp-multi",
"tags": [
"search",
"web-search",
"serp",
"metasearch",
"multi-engine"
],
"mimeType": "application/json",
"description": "Multi-engine web search (metasearch). One search query fanned out across 2-3 search engines (Brave, Yahoo, Yandex) with results deduplicated by URL and merged by reciprocal-rank fusion: consensus ranking across engines instead of one engine's bias, with per-engine rank attribution on every result.",
"serviceName": "Multi-Engine Web Search"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "best vector database 2026",
"engines": "yahoo,yandex"
}
},
"output": {
"type": "json",
"example": {
"count": 2,
"items": [
{
"type": "serp_multi",
"query": "best vector database 2026",
"engines": [
{
"engine": "yahoo",
"resultCount": 10
},
{
"engine": "yandex",
"resultCount": 10
}
],
"mergedCount": 14
},
{
"url": "https://example.com/vectordb",
"rank": 1,
"type": "search_result",
"title": "Vector DB Comparison",
"engines": [
"yahoo",
"yandex"
],
"snippet": "A comparison of...",
"engineRanks": {
"yahoo": 1,
"yandex": 3
}
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"q",
"engines"
],
"properties": {
"q": {
"type": "string",
"description": "search query"
},
"mode": {
"enum": [
"web",
"news"
],
"type": "string",
"default": "web"
},
"region": {
"type": "string",
"default": "us-en",
"description": "locale, e.g. us-en, uk-en, de-de"
},
"engines": {
"type": "string",
"description": "comma list of 2-3 engines: yahoo, yandex (web mode). news mode has a single live engine (bing), so multi-engine is web-only"
},
"timelimit": {
"enum": [
"d",
"w",
"m",
"y"
],
"type": "string",
"description": "restrict to past day/week/month/year"
},
"safesearch": {
"enum": [
"on",
"moderate",
"off"
],
"type": "string",
"default": "moderate"
},
"num_results": {
"type": "string",
"default": "10",
"description": "max results per engine, cap 25"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 43 of 43
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.kadec0.xyz/v1/geocode",
"tags": [
"geocode",
"geocoding",
"lat-lng",
"address",
"coordinates"
],
"mimeType": "application/json",
"description": "Geocoding and reverse geocoding. Converts an address or place name to latitude/longitude, or coordinates back to an address.",
"serviceName": "Geocoding & Reverse Geocode"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "1600 Amphitheatre Parkway, Mountain View, CA"
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"items": [
{
"lat": 37.422,
"lon": -122.0841,
"type": "geocode",
"address": {
"city": "Mountain View",
"country": "United States"
},
"displayName": "Googleplex, Mountain View, CA, USA"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"anyOf": [
{
"required": [
"q"
]
},
{
"required": [
"lat",
"lon"
]
}
],
"required": [],
"properties": {
"q": {
"type": "string",
"description": "address (forward geocode)"
},
"lat": {
"type": "string",
"description": "latitude (reverse geocode)"
},
"lon": {
"type": "string",
"description": "longitude (reverse geocode)"
},
"maxItems": {
"type": "string",
"default": "5"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Can I trust it score from our own monitoring
score from our own monitoring
87/100 Solid
#74 of 386 in Data. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.
- Reliability
- 75% uptime 30d
- Compliance
- A 14/14 checks pass
- Price
- $0.005 to $0.15 p42 in Data
- Risk
- clean no risk flag
- Traction
- $119.78 30d 34 buyers, top buyer 91% (address, not entity) Concentrated volume: 94% of 30d volume from 3 wallets
14/14 compliance checks
- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
- declares the current x402 version (2)
- EIP-712 domain parameters present on every EVM entry
- x402 v2 envelope delivered in the payment-required header
402 terms unchanged since 2026-09-08. Last up 2026-10-19.
── Site signals
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
How the score works
What the score read on this service: status online, 75% uptime 30d, 219ms response p95, x402 compliance 14 of 14, $0.005 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.
The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.
Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.
It is a score inside Data, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 386 listings, this one among them: the same 386 the position above is counted against. When the two differ, the field is the wider one, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.
Settled via coinbase ($119.78, 3,657 tx). Traction is a conservative undercount; first settlement seen 2026-06-21.
All measured facts
What it does
Pay-per-call web search and web data for AI agents. Multi-engine SERP (web + news, batch, rank-fused), search-and-read (top hits to markdown in one call), URL-to-markdown scraping, Google Trends (interest over time, related queries/topics, by region), structured data (WHOIS/DNS, enrichment, SEC filings, crypto/DeFi, geocoding, weather) and academic search (papers, references, cited-by, lit-review). 43 endpoints, USDC on Base, no key, no signup.
Web Search & Data API · SERP, page reader & scrapers is a listed x402 Data API. Captured payment terms name Base. Monitoring and settlement figures below describe the observations available to this directory; an unpaid HTTP 402 check does not prove that a paid call will deliver.
Assessment computed at . Latest service check observed at . Service data JSON · Measurement methodology.
Page rendered at . This response time is separate from the observation and computation times attached to each measurement.
Latest endpoint observation: . Latest price capture: . Prices are recorded quotes, not a promise of availability. Token assets and payment terms are listed separately. Endpoint data JSON · Price history JSON · Measurement methodology.
Assessment computed at . Uptime uses the stated daily-rollup window; response times are in milliseconds, compliance is passed/evaluated checks, and traction is a measured settlement floor. The comparison score is out of 100 within this category. Assessment JSON · Measurement methodology.
Observed daily coverage: 2026-09-20 to 2026-10-19 UTC. Daily monitoring and settlement rollups do not expose their computation time; a bucket date is not an update timestamp. Latest settlement in the assessment: . Uptime and response JSON · Volume JSON · Buyers JSON · Measurement methodology.
Ranked from the measured category pool, refreshed at most once a minute. The comparison has no persisted computation timestamp; the assessment time above belongs to this service only. Ranking API documentation · Ranking methodology.
x402 List home · Services · Data
- uptime · latest daily rollup
- 73.1%
- uptime 7d
- 75%
- uptime 30d
- 75%
- uptime 90d
- 91.4%
- response p95
- 219ms
- avg response
- 148ms
- total checks
- 2,712
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
- price (min)
- $0.005
- price (max)
- $0.15
- category percentile (min)
- p42 in Data
- category percentile (max)
- p77 in Data
- endpoints / prices
- 43 / 9
- model
- tiered
- stability
- 0%
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
- domain age
- -
- registrar
- -
- hosting
- custom
- domain created
- ---
Identity facts, not a risk score.
- assessment volume 30d
- $119.78
- exact assessment volume 30d (USD)
- 119.78
- assessment recorded at (UTC)
- 2026-10-19T08:03:41.296Z
- buyers 30d
- 34
- settlements 30d
- 3,657
- measured since
- 2026-06-21 (start of our harvest window)
- last settlement
- 2026-10-19
- top buyer share
- 91% of 30d volume (address, not entity)
- top 3 buyers share
- 94% of 30d volume (addresses, not entities)
- concentrated volume
- yes
- trend 7d vs 30d
- 1.54x the 30d daily rate
- networks
- eip155:8453
- volume all-time
- $290.92
- settlements all-time
- 9,282
- median settlement 30d
- $0.03
- max settlement 30d
- $0.15
Assessment volume uses the latest 30d assessment. Over time sums daily address snapshots, rounded to cents and refreshed separately. The two sources can differ in timing, precision and shared-address attribution. Amounts use cents for comparison; known sub-cent values keep up to 12 significant digits. The exact stored assessment value is shown above.
Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.
Concentrated volume is one rule applied to every listed service: the 3 largest paying addresses hold at least 90% of 30d volume, with at least $10 of volume and 50 settlements in the same 30 days. While it applies, this service's volume counts as 0 in the Recommended and Highest volume sorts of the services list. The label says where the payments came from, not why.
Top buyer share lowers the on-chain traction part of the ranking score behind this page's verdict and /best, by up to half when one address holds all 30d volume. The Recommended and Highest volume sorts of the services list do not use it; they use the Concentrated volume rule instead.
- member since
- 2026-07-20
Recent checks
| Checked at (UTC) | Status | HTTP | Response | Endpoints |
|---|---|---|---|---|
| Online | 402 | 92ms | 43 | |
| Online | 402 | 94ms | 43 | |
| Offline | 429 | 162ms | 0 | |
| Online | 402 | 117ms | 34 | |
| Online | 402 | 105ms | 43 | |
| Online | 402 | 97ms | 43 | |
| Offline | 429 | 185ms | 0 | |
| Online | 402 | 156ms | 34 | |
| Online | 402 | 113ms | 43 | |
| Online | 402 | 102ms | 43 | |
| Offline | 429 | 169ms | 0 | |
| Online | 402 | 125ms | 34 | |
| Online | 402 | 126ms | 43 | |
| Online | 402 | 128ms | 43 | |
| Offline | 429 | 188ms | 0 | |
| Online | 402 | 156ms | 34 | |
| Online | 402 | 112ms | 43 | |
| Online | 402 | 122ms | 43 |
Changes0 in 30d
No changes recorded in the last 30 days.
Over time
On-chain volume daily snapshots, USD 30d: $119.78, peak $14.41 on 10-12
volume
Distinct buyers per dayDistinct buyers per day
Uptime 29 of 29 completed days below 100%
uptime below 100%, to scale
- Volume 30d
- $119.78
- Uptime
- 29 of 29 completed days below 100%
More charts
Response time daily average, ms min 112ms, avg 147ms, max 223ms
09-20 to 10-19* UTC
Scores over time
x402 compliance low 14/14, high 14/14
09-20 to 10-19* UTC
Price percentile in Data own low to high; exact values below
09-20 to 10-19* UTC
Site signals present (of 6) own low to high; exact values below
09-20 to 10-19* UTC
Scores: one day per column, 09-20 to 10-19*, on the columns of Response time. Uptime held below 100% on some days in this window, including any partial day. Daily readings remain in the Uptime strip and Values. The checklist grew from 11 to 14 checks on 2026-07-28, before this window. Pillar lines use their own low and high. Exact dated readings are available in each readout and in Values.
Each series spans only the dates it has data for. Every series is also served as JSON at /api, /scores, /volume and /buyers.
Values
* today so far, partial (UTC).
The uptime summary counts completed UTC days only. The strip, readouts and table retain today's partial reading.
Daily snapshot total, 30d: $119.28, peak $14.41 on 10-12. The visible 30d total in Traction comes from the latest assessment. These sources can differ in their window, refresh time, cent rounding and shared-address attribution.
Daily address snapshots: 2026-09-20 to 2026-10-19 UTC; * today so far, partial (UTC). Daily snapshots store cents. A recorded $0.00 with settlements cannot distinguish exact zero from volume rounded away. Lost precision is unavailable here.
Settlement volume uses the stored USD valuation of tracked payments; it is distinct from token quantities. USD-pegged assets are valued at 1 USD per token in these rollups. The measured settlement floor does not cover all payments to this service.
Assessment history last recorded at . Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.
| Day | Volume | Buyers | Settlements | Uptime | Response | Compliance | Price percentile | Site signals |
|---|---|---|---|---|---|---|---|---|
| 2026-09-20 | $2.01 | 2 | 76 | 75.56% | 161.72ms | 14/14 | p40 | 2/6 |
| 2026-09-21 | $5.69 | 3 | 128 | 74.44% | 177.49ms | 14/14 | p40 | 2/6 |
| 2026-09-22 | $2.82 | 4 | 74 | 75.56% | 205.12ms | 14/14 | p40 | 2/6 |
| 2026-09-23 | $2.52 | 4 | 90 | 74.44% | 195.88ms | 14/14 | p41 | 2/6 |
| 2026-09-24 | $5.44 | 5 | 103 | 75.56% | 188.71ms | 14/14 | p40 | 2/6 |
| 2026-09-25 | $4.49 | 3 | 117 | 74.44% | 200.19ms | 14/14 | p40 | 2/6 |
| 2026-09-26 | $3.82 | 2 | 92 | 75.56% | 222.91ms | 14/14 | p40 | 2/6 |
| 2026-09-27 | $2.03 | 3 | 61 | 75.28% | 181.99ms | 14/14 | p40 | 2/6 |
| 2026-09-28 | $4.13 | 5 | 115 | 74.44% | 125.54ms | 14/14 | p41 | 2/6 |
| 2026-09-29 | $1.94 | 2 | 57 | 75.56% | 120.13ms | 14/14 | p41 | 2/6 |
| 2026-09-30 | $2.46 | 5 | 74 | 74.44% | 121.28ms | 14/14 | p41 | 2/6 |
| 2026-10-01 | $2.71 | 5 | 86 | 75.56% | 112.13ms | 14/14 | p41 | 2/6 |
| 2026-10-02 | $2.59 | 3 | 70 | 74.44% | 122.43ms | 14/14 | p41 | 2/6 |
| 2026-10-03 | $1.24 | 1 | 42 | 75.56% | 126.15ms | 14/14 | p41 | 2/6 |
| 2026-10-04 | $3.39 | 6 | 97 | 74.44% | 200.75ms | 14/14 | p43 | 2/6 |
| 2026-10-05 | $4.15 | 6 | 69 | 75.28% | 157.54ms | 14/14 | p43 | 2/6 |
| 2026-10-06 | $3.18 | 7 | 113 | 74.44% | 142.10ms | 14/14 | p42 | 2/6 |
| 2026-10-07 | $2.68 | 7 | 86 | 75.56% | 142.74ms | 14/14 | p42 | 2/6 |
| 2026-10-08 | $4.04 | 8 | 125 | 74.44% | 141.12ms | 14/14 | p43 | 2/6 |
| 2026-10-09 | $1.12 | 5 | 64 | 75.56% | 126.09ms | 14/14 | p43 | 2/6 |
| 2026-10-10 | $1.29 | 4 | 66 | 74.44% | 119.94ms | 14/14 | p42 | 2/6 |
| 2026-10-11 | $6.62 | 5 | 168 | 75.56% | 112.85ms | 14/14 | p43 | 2/6 |
| 2026-10-12 | $14.41 | 5 | 423 | 74.44% | 122.64ms | 14/14 | p43 | 2/6 |
| 2026-10-13 | $2.84 | 5 | 94 | 75.56% | 129.68ms | 14/14 | p43 | 2/6 |
| 2026-10-14 | $6.83 | 5 | 289 | 75.28% | 125.03ms | 14/14 | p42 | 2/6 |
| 2026-10-15 | $4.00 | 4 | 180 | 74.44% | 121.24ms | 14/14 | p42 | 2/6 |
| 2026-10-16 | $5.40 | 2 | 281 | 75.56% | 123.94ms | 14/14 | p42 | 2/6 |
| 2026-10-17 | $0.67 | 4 | 39 | 74.16% | 145.09ms | 14/14 | p42 | 2/6 |
| 2026-10-18 | $14.13 | 3 | 321 | 75.86% | 121.74ms | 14/14 | p42 | 2/6 |
| 2026-10-19* | $0.64 | 3 | 43 | 73.17% | 124.20ms | 14/14 | p42 | 2/6 |
Alternatives in Data
5 of 385 other ranked services in Data, ordered by the same measured score.
Own this service?
Keep this listing accurate. Ownership is proven with a domain check and every change is reviewed by hand.
Update this listingEarn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.
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HTML
<a href="https://x402-list.com/services/ hacker-news-stories-search? utm_source=badge& utm_medium=referral& utm_campaign=embed"> <img src="https://x402-list.com/ badge/ hacker-news-stories-search.svg" alt="Web Search & Data API — SERP, page reader & scrapers listed on x402-list" height="28"> </a>
Markdown
[](https://x402-list.com/ services/ hacker-news-stories-search? utm_source=badge& utm_medium=referral& utm_campaign=embed)
HTML, live uptime variant
<a href="https://x402-list.com/services/ hacker-news-stories-search? utm_source=badge& utm_medium=referral& utm_campaign=embed"> <img src="https://x402-list.com/ badge/ hacker-news-stories-search.svg? data=uptime" alt="Web Search & Data API — SERP, page reader & scrapers uptime on x402-list" height="28"> </a>
Delisting
To request delisting, email info@x402-list.com or update your listing at /services/hacker-news-stories-search/update.