x402 List

x402 Protocol Service Directory

Web Search & Data API — SERP, page reader & scrapers

Data PAYMENT-READY imported

payment-ready until 2026-09-30

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. 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.

Pay from $0.005 to $0.15 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-06-21 (start of our harvest window) · $181.89 all-time · settled via coinbase

BASE URL https://api.kadec0.xyz WEBSITE https://api.kadec0.xyz/docs ENDPOINTS 43 NETWORK Base ASSET USDC MEMBER SINCE 2026-07-20 MONITORED SINCE 2026-07-20

VERDICT

ranking generation 3

solid 84/100 #135 of 316 in Data by measured score

What the score read on this service: status degraded, 96.6% uptime 30d, 250ms 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.

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 316 listings, this one among them. That set is wider than the 316 the position above is counted against, 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.

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.

ALTERNATIVES IN DATA

Other Data services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE BAND SCORE UPTIME 30D VOL 30D
StableEnrich strong 96 100% $2.0k
glim.sh strong 95 100% $47.37
SniperX•x402 strong 95 100% $326.57
cn402 strong 94 100% $36.42
API Acre solid 92 99.5% $31.95
5 of 315 other ranked services in Data · see the whole category

ASSESSMENT

updated 4h ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 96.6%
uptime 24h
76%
uptime 7d
85%
uptime 30d
96.6%
uptime 90d
98.4%
response p95
250ms
avg response
252ms
total checks
2,759

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.005 to $0.15 (p40 in Data)
price (min)
$0.005
price (max)
$0.15
category percentile (min)
p40 in Data
category percentile (max)
p79 in Data
endpoints / prices
43 / 9
model
tiered
stability
0%
risk clean

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.

traction $139.345 30d · 58 buyers · top buyer 91%
volume 30d
$139.345
buyers 30d
58
settlements 30d
4,127
measured since
2026-06-21 (start of our harvest window)
last settlement
2026-09-22
top buyer share
91% of 30d volume
trend 7d vs 30d
0.60x the 30d daily rate
networks
eip155:8453
volume all-time
$181.89
settlements all-time
5,926
median settlement 30d
$0.03
max settlement 30d
$0.10
settled via
coinbase ($139.34, 4,127 tx)

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share is a concentration signal, not part of the ranking score.

CHANGES

2 in 30d

Payout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.

changes price changed 14d ago (2 in 30d)

price changed · 14d ago

GET /v1/serp · eip155:8453 · USDC: 3000050000

schema changed · 15d ago

endpoint added GET /v1/author-search

endpoint added GET /v1/congress-trades

endpoint added GET /v1/cve

endpoint added GET /v1/defi-tvl

endpoint added GET /v1/dns-propagation

endpoint added GET /v1/domain-info

endpoint added GET /v1/email-validate

endpoint added GET /v1/enrich

endpoint added GET /v1/fda

endpoint added GET /v1/gas-oracle

endpoint added GET /v1/interest-by-region

endpoint added GET /v1/lit-review

endpoint added GET /v1/market-sentiment

endpoint added GET /v1/nutrition

endpoint added GET /v1/paper-details

endpoint added GET /v1/papers

endpoint added GET /v1/permits

endpoint added GET /v1/recalls

endpoint added GET /v1/related-papers

endpoint added GET /v1/related-queries

endpoint added GET /v1/related-topics

endpoint added GET /v1/serp

endpoint added GET /v1/smart-search

endpoint added GET /v1/stablecoins

endpoint added GET /v1/stackoverflow

endpoint added GET /v1/token-price

endpoint added GET /v1/topic-search

endpoint added GET /v1/trend

endpoint added GET /v1/trending-coins

endpoint added GET /v1/usgs-quakes

endpoint added GET /v1/weather

endpoint added GET /v1/whois-bulk

endpoint added GET /v1/yield-pools

schema added GET /v1/author-search exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/congress-trades exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/cve exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/defi-tvl exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/dns-propagation exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/domain-info exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/email-validate exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/enrich exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/fda exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/gas-oracle exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/interest-by-region exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/lit-review exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/market-sentiment exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/nutrition exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/paper-details exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/papers exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/permits exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/recalls exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/related-papers exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/related-queries exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/related-topics exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/serp exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/smart-search exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/stablecoins exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/stackoverflow exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/token-price exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/topic-search exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/trend exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/trending-coins exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/usgs-quakes exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/weather exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/whois-bulk exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/yield-pools exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

Amounts are on-wire atomic units in the named asset.

see all changes for this service

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD PATH DESCRIPTION PRICE NETWORK ASSET 402 CHANNEL
GET /v1/author-search $0.02 Base USDC header
GET /v1/congress-trades $0.05 Base USDC header
GET /v1/cve $0.01 Base USDC header
GET /v1/defi-tvl $0.02 Base USDC header
GET /v1/dns-propagation $0.03 Base USDC header
GET /v1/domain-info $0.02 Base USDC header
GET /v1/email-validate $0.03 Base USDC header
GET /v1/enrich $0.15 Base USDC header
GET /v1/fda $0.02 Base USDC header
GET /v1/gas-oracle $0.01 Base USDC header
GET /v1/geocode $0.01 Base USDC header
GET /v1/github $0.02 Base USDC header
GET /v1/hackernews $0.01 Base USDC header
GET /v1/interest-by-region $0.03 Base USDC header
GET /v1/lit-review $0.08 Base USDC header
GET /v1/market-sentiment $0.05 Base USDC header
GET /v1/nutrition $0.01 Base USDC header
GET /v1/paper-details $0.03 Base USDC header
GET /v1/paper-fulltext $0.04 Base USDC header
GET /v1/papers $0.02 Base USDC header
GET /v1/permits $0.03 Base USDC header
GET /v1/recalls $0.02 Base USDC header
GET /v1/related-papers $0.03 Base USDC header
GET /v1/related-queries $0.03 Base USDC header
GET /v1/related-topics $0.03 Base USDC header
GET /v1/scrape $0.03 Base USDC header
GET /v1/sec-edgar $0.05 Base USDC header
GET /v1/serp $0.05 Base USDC header
GET /v1/serp-batch $0.10 Base USDC header
GET /v1/serp-multi $0.05 Base USDC header
GET /v1/serp-read $0.08 Base USDC header
GET /v1/smart-search $0.02 Base USDC header
GET /v1/stablecoins $0.02 Base USDC header
GET /v1/stackoverflow $0.01 Base USDC header
GET /v1/token-price $0.01 Base USDC header
GET /v1/topic-search $0.02 Base USDC header
GET /v1/trend $0.05 Base USDC header
GET /v1/trending-coins $0.01 Base USDC header
GET /v1/usgs-quakes $0.005 Base USDC header
GET /v1/weather $0.005 Base USDC header
GET /v1/website-audit $0.08 Base USDC header
GET /v1/whois-bulk $0.05 Base USDC header
GET /v1/yield-pools $0.03 Base USDC header
43 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /v1/author-search returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://api.kadec0.xyz/v1/author-search'
// 402 response (captured by monitor) · 43 payloads · click to expand
[
  {
    "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
  },
  {
    "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
  },
  {
    "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"
            }
          },
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      "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
  },
  {
    "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
  },
  {
    "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
  },
  {
    "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
  },
  {
    "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
  },
  {
    "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
  },
  {
    "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
  },
  {
    "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"
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              ]
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
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              "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": {
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                  "type": "object"
                }
              }
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    "x402Version": 2
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        "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
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                  "type": "lit_review",
                  "counts": {
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                    "citedBy": 10,
                    "related": 10,
                    "references": 10
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                      "title": "BERT",
                      "relation": "cited_by"
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                  ],
                  "references": [
                    {
                      "year": 2014,
                      "title": "Neural Machine Translation",
                      "relation": "reference"
                    }
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                }
              ]
            }
          }
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        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
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          "properties": {
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                "type",
                "method"
              ],
              "properties": {
                "type": {
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                  "const": "http"
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                    "HEAD",
                    "DELETE"
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                  "type": "string"
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                "queryParams": {
                  "type": "object",
                  "anyOf": [
                    {
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                    {
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                        "doi"
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                    },
                    {
                      "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)"
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            "output": {
              "type": "object",
              "required": [
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    "accepts": [
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        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
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    ],
    "resource": {
      "url": "https://api.kadec0.xyz/v1/topic-search",
      "tags": [
        "topic-search",
        "field-search",
        "research-field",
        "paper-discovery",
        "openalex-topics"
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      "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"
    },
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            "type": "http",
            "method": "GET",
            "queryParams": {
              "q": "exercise science",
              "maxItems": "12"
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                  "query": "exercise science",
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                      "title": "ACSM Position Stand...",
                      "clusterRole": "top_cited",
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                    "confidence": 0.32,
                    "isQuestion": false,
                    "matchedVia": "works-subfield-modal",
                    "groundingLevel": "subfield"
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                    "field": "Medicine",
                    "level": "subfield",
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              "required": [
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                "method"
              ],
              "properties": {
                "type": {
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                  "const": "http"
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                "queryParams": {
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                  "required": [
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                      "type": "string",
                      "description": "a field, discipline, or short topic phrase (e.g. 'crispr', 'exercise science')"
                    },
                    "maxItems": {
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                      "default": "12",
                      "description": "cluster size cap (1-25)"
                    }
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              "additionalProperties": false
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            "output": {
              "type": "object",
              "required": [
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              "properties": {
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    "accepts": [
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        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
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    ],
    "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",
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                  "price": 0.999,
                  "chains": [
                    "Ethereum",
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                    "BSC"
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                  "symbol": "USDT",
                  "pegType": "peggedUSD",
                  "circulating": 186345714276.06,
                  "pegMechanism": "fiat-backed"
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        "schema": {
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          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
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          "properties": {
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              "properties": {
                "type": {
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                  "const": "http"
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                "method": {
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                    "DELETE"
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                  "type": "string"
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                "queryParams": {
                  "type": "object",
                  "required": [],
                  "properties": {
                    "q": {
                      "type": "string",
                      "description": "name/symbol substring filter"
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                    "pegType": {
                      "type": "string",
                      "description": "e.g. peggedUSD|peggedEUR"
                    },
                    "maxItems": {
                      "type": "string",
                      "default": "25"
                    },
                    "mechanism": {
                      "type": "string",
                      "description": "fiat-backed|crypto-backed|algorithmic"
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              "additionalProperties": false
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            "output": {
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              "required": [
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              "properties": {
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    "accepts": [
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        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
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    ],
    "resource": {
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      "tags": [
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        "smart-search",
        "hybrid-search",
        "question-search",
        "paper-search"
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      "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"
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    "extensions": {
      "bazaar": {
        "info": {
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            "type": "http",
            "method": "GET",
            "queryParams": {
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              "maxItems": "15"
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            "example": {
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                  "mode": "hybrid",
                  "type": "smart_search",
                  "count": 15,
                  "query": "does zone 2 training improve mitochondrial density in older adults",
                  "results": [
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                  ],
                  "routing": {
                    "fusion": "openalex-only",
                    "s2Hits": 0,
                    "embedded": 18,
                    "reranked": true,
                    "wordCount": 10,
                    "isQuestion": true,
                    "openAlexHits": 30
                  },
                  "grounding": null
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              ]
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          }
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        "schema": {
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          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
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          "properties": {
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              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
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                  "type": "string"
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                "queryParams": {
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                  "required": [
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                  ],
                  "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": {
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                      "default": "15",
                      "description": "max results (1-40)"
                    }
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        "scheme": "exact",
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    "resource": {
      "url": "https://api.kadec0.xyz/v1/email-validate",
      "tags": [
        "email",
        "email-validation",
        "mx-records",
        "disposable-email",
        "lead-gen"
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      "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": [
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                  "type": "email_validation",
                  "email": "[email protected]",
                  "domain": "mailinator.com",
                  "mxFound": true,
                  "reasons": [
                    "disposable/throwaway domain",
                    "role account (info@)"
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                  "verdict": "risky",
                  "localPart": "info",
                  "mxRecords": [
                    {
                      "host": "mail2.mailinator.com",
                      "priority": 10
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                  ],
                  "normalized": "[email protected]",
                  "roleAccount": true,
                  "syntaxValid": true,
                  "freeProvider": false,
                  "disposableDomain": true
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          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
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          "properties": {
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              "required": [
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                "method"
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              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
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                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
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                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "required": [
                    "emails"
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                  "properties": {
                    "emails": {
                      "type": "string",
                      "description": "comma-separated email addresses, up to 25 per call (a single address works too)"
                    }
                  }
                }
              },
              "additionalProperties": false
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            "output": {
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              "required": [
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    "resource": {
      "url": "https://api.kadec0.xyz/v1/permits",
      "tags": [
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        "construction",
        "municipal",
        "real-estate",
        "government"
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      "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.",
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              "date_range": "2024-01-01,2026-06-21",
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                        "seattle",
                        "sf"
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                    "address": {
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                      "description": "YYYY-MM-DD,YYYY-MM-DD (from,to)"
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                      "description": "full-text match on permit type/description"
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    },
    "extensions": {
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        "info": {
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            "method": "GET",
            "queryParams": {
              "maxItems": "7"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "count": 1,
              "items": [
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          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
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              "properties": {
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                  "const": "http"
                },
                "method": {
                  "enum": [
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                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
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                  "required": [],
                  "properties": {
                    "maxItems": {
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                      "description": "cap 15"
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                  }
                }
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            },
            "output": {
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              "required": [
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              ],
              "properties": {
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                "example": {
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              }
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        }
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    },
    "x402Version": 2
  },
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    "error": "Payment required",
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        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.kadec0.xyz/v1/papers",
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        "paper-search",
        "arxiv-api",
        "pubmed-search",
        "research-paper-api"
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      "serviceName": "Academic Paper Search"
    },
    "extensions": {
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        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
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          },
          "output": {
            "type": "json",
            "example": {
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              "items": [
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                  "source": "openalex",
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                  "abstract": "The dominant sequence transduction models...",
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        "schema": {
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          "$schema": "https://json-schema.org/draft/2020-12/schema",
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          "properties": {
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              "properties": {
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                },
                "method": {
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                    "HEAD",
                    "DELETE"
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                  ],
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                    "sort": {
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                        "recency",
                        "citations"
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                      "type": "string",
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                        "arxiv",
                        "pubmed",
                        "openalex",
                        "crossref",
                        "semanticscholar"
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                      "type": "string",
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                    "year_to": {
                      "type": "string",
                      "description": "latest publication year (inclusive)"
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                      "default": "20",
                      "description": "1-50"
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                    "year_from": {
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                      "description": "earliest publication year (inclusive)"
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            },
            "output": {
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              "required": [
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              ],
              "properties": {
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                "example": {
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    },
    "x402Version": 2
  },
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        },
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        "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": {
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              "items": [
                {
                  "name": "Yoshua Bengio",
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                  "i10Index": 600,
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                  ],
                  "openAlexId": "https://openalex.org/A...",
                  "worksCount": 1284,
                  "affiliations": [
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                      "country": "CA"
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        "schema": {
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          "$schema": "https://json-schema.org/draft/2020-12/schema",
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                    "DELETE"
                  ],
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                "queryParams": {
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                  "required": [
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                  "properties": {
                    "name": {
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                      "description": "author name to search"
                    },
                    "maxItems": {
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                      "default": "10",
                      "description": "1-25 candidate authors"
                    },
                    "top_works": {
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                      "default": "5",
                      "description": "top papers per author (0-25)"
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              "additionalProperties": false
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            "output": {
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              "required": [
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              "properties": {
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    "x402Version": 2
  },
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          "version": "2"
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        "amount": "80000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
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        "web-search",
        "serp",
        "answer-with-sources",
        "web-reader"
      ],
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      "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": {
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                      "type": "search_result",
                      "title": "x402 docs",
                      "snippet": "HTTP 402..."
                    }
                  ],
                  "resultCount": 5
                },
                {
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                  "rank": 1,
                  "type": "page_extract",
                  "title": "x402 docs",
                  "markdown": "# x402\nThe payment-required protocol...",
                  "wordCount": 900,
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                  "markdownTruncated": false
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                      "description": "how many top results to fetch and extract, cap 5"
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                    "timelimit": {
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                        "w",
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                      "type": "string",
                      "description": "restrict to past day/week/month/year"
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    "x402Version": 2
  },
  {
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    "accepts": [
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          "version": "2"
        },
        "payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
        "amount": "80000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
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      "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": {
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        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "url": "https://example.com"
            }
          },
          "output": {
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            "example": {
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              "items": [
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                  "url": "https://example.com",
                  "type": "website_audit",
                  "score": 84,
                  "issues": [
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                  ]
                }
              ]
            }
          }
        },
        "schema": {
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          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
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          "properties": {
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                  "required": [
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                  "properties": {
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              "properties": {
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    "x402Version": 2
  },
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        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
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      "tags": [
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        "repository",
        "open-source",
        "developer",
        "code"
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      "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"
            }
          },
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              "items": [
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                },
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                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
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                  "anyOf": [
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                    {
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                      ]
                    }
                  ],
                  "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": {
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                      "default": "30"
                    },
                    "usernames": {
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                      "description": "comma list (mode=user)"
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            "output": {
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              "required": [
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              "properties": {
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                  "type": "string"
                },
                "example": {
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              }
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    "x402Version": 2
  },
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    "accepts": [
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        "extra": {
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        "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": {
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          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
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          ],
          "properties": {
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              "required": [
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                "method"
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              "properties": {
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                  "const": "http"
                },
                "method": {
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                    "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": {
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              "required": [
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              "properties": {
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    },
    "x402Version": 2
  },
  {
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    "accepts": [
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        },
        "payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
        "amount": "40000",
        "scheme": "exact",
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OVER TIME

All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/hacker-news-stories-search/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME
09-18 · uptime 93.3% · 163ms avg09-19 · uptime 74.4% · 157ms avg09-20 · uptime 75.6% · 162ms avg09-21 · uptime 74.4% · 177ms avg09-22 · uptime 75.6% · 205ms avg08-25 · uptime 100.0% · 230ms avg08-26 · uptime 100.0% · 232ms avg08-27 · uptime 100.0% · 213ms avg08-28 · uptime 100.0% · 223ms avg08-29 · uptime 100.0% · 177ms avg08-30 · uptime 100.0% · 158ms avg08-31 · uptime 100.0% · 387ms avg09-01 · uptime 100.0% · 574ms avg09-02 · uptime 100.0% · 353ms avg09-03 · uptime 100.0% · 266ms avg09-04 · uptime 100.0% · 293ms avg09-05 · uptime 100.0% · 322ms avg09-06 · uptime 100.0% · 293ms avg09-07 · uptime 100.0% · 324ms avg09-08 · uptime 100.0% · 301ms avg09-09 · uptime 100.0% · 212ms avg09-10 · uptime 100.0% · 257ms avg09-11 · uptime 100.0% · 365ms avg09-12 · uptime 100.0% · 357ms avg09-13 · uptime 100.0% · 298ms avg09-14 · uptime 100.0% · 186ms avg09-15 · uptime 100.0% · 149ms avg09-16 · uptime 100.0% · 137ms avg09-17 · uptime 100.0% · 158ms avg09-18 · uptime 93.3% · 163ms avg09-19 · uptime 74.4% · 157ms avg09-20 · uptime 75.6% · 162ms avg09-21 · uptime 74.4% · 177ms avg09-22 · uptime 75.6% · 205ms avg08-2509-22
30d UPTIME 96.3%
RESPONSE TIME
08-25 · 230ms avg08-25 · 230ms avg08-26 · 232ms avg08-26 · 232ms avg08-27 · 213ms avg08-27 · 213ms avg08-28 · 223ms avg08-28 · 223ms avg08-29 · 177ms avg08-29 · 177ms avg08-30 · 158ms avg08-30 · 158ms avg08-31 · 387ms avg08-31 · 387ms avg09-01 · 574ms avg09-01 · 574ms avg09-02 · 353ms avg09-02 · 353ms avg09-03 · 266ms avg09-03 · 266ms avg09-04 · 293ms avg09-04 · 293ms avg09-05 · 322ms avg09-05 · 322ms avg09-06 · 293ms avg09-06 · 293ms avg09-07 · 324ms avg09-07 · 324ms avg09-08 · 301ms avg09-08 · 301ms avg09-09 · 212ms avg09-09 · 212ms avg09-10 · 257ms avg09-10 · 257ms avg09-11 · 365ms avg09-11 · 365ms avg09-12 · 357ms avg09-12 · 357ms avg09-13 · 298ms avg09-13 · 298ms avg09-14 · 186ms avg09-14 · 186ms avg09-15 · 149ms avg09-15 · 149ms avg09-16 · 137ms avg09-16 · 137ms avg09-17 · 158ms avg09-17 · 158ms avg09-18 · 163ms avg09-18 · 163ms avg09-19 · 157ms avg09-19 · 157ms avg09-20 · 162ms avg09-20 · 162ms avg09-21 · 177ms avg09-21 · 177ms avg09-22 · 205ms avg09-22 · 205ms avg08-2509-22
AVG RESP 252ms
PRICE (captured 402, USD)
08-24 · $0.04509-08 · $0.0309-23 · $0.03$0.0308-2409-23

Median across 43 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
08-24 uptime: 100.0% compliance: 100% checks08-25 uptime: 100.0% compliance: 100% checks08-26 uptime: 100.0% compliance: 100% checks08-27 uptime: 100.0% compliance: 100% checks08-28 uptime: 100.0% compliance: 100% checks08-29 uptime: 100.0% compliance: 100% checks08-30 uptime: 100.0% compliance: 100% checks08-31 uptime: 100.0% compliance: 100% checks09-01 uptime: 100.0% compliance: 100% checks09-02 uptime: 100.0% compliance: 100% checks09-03 uptime: 100.0% compliance: 100% checks09-04 uptime: 100.0% compliance: 100% checks09-05 uptime: 100.0% compliance: 100% checks09-06 uptime: 100.0% compliance: 100% checks09-07 uptime: 100.0% compliance: 100% checks09-08 uptime: 100.0% compliance: 100% checks09-09 uptime: 100.0% compliance: 100% checks09-10 uptime: 100.0% compliance: 100% checks09-11 uptime: 100.0% compliance: 100% checks09-12 uptime: 100.0% compliance: 100% checks09-13 uptime: 100.0% compliance: 100% checks09-14 uptime: 100.0% compliance: 100% checks09-15 uptime: 100.0% compliance: 100% checks09-16 uptime: 100.0% compliance: 100% checks09-17 uptime: 100.0% compliance: 100% checks09-18 uptime: 100.0% compliance: 100% checks09-19 uptime: 99.1% compliance: 100% checks09-20 uptime: 98.3% compliance: 100% checks09-21 uptime: 97.4% compliance: 100% checks09-22 uptime: 96.6% compliance: 100% checksuptimecompliance08-2409-22

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)
08-25 · $208-26 · $208-27 · $208-28 · $308-29 · $1108-30 · $4308-31 · $709-01 · $309-02 · $209-03 · $309-04 · $0.3909-05 · $209-06 · $209-07 · $709-08 · $509-09 · $209-10 · $309-11 · $709-12 · $209-13 · $209-14 · $0.7509-15 · $509-16 · $409-17 · $109-18 · $309-19 · $109-20 · $209-21 · $609-22 · $3peak $4308-2509-22
DISTINCT BUYERS
08-25 · 1 buyer08-26 · 5 buyers08-27 · 2 buyers08-28 · 2 buyers08-29 · 2 buyers08-30 · 2 buyers08-31 · 7 buyers09-01 · 5 buyers09-02 · 5 buyers09-03 · 6 buyers09-04 · 9 buyers09-05 · 3 buyers09-06 · 5 buyers09-07 · 9 buyers09-08 · 9 buyers09-09 · 11 buyers09-10 · 5 buyers09-11 · 9 buyers09-12 · 3 buyers09-13 · 2 buyers09-14 · 2 buyers09-15 · 3 buyers09-16 · 4 buyers09-17 · 6 buyers09-18 · 5 buyers09-19 · 4 buyers09-20 · 2 buyers09-21 · 3 buyers09-22 · 4 buyerspeak 11 buyers08-2509-22

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-09-08 · last up 2026-09-23

  • 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

SITE PILLARS

  • homepage reachable
  • openapi doc
  • pricing page
  • llms.txt
  • robots.txt
  • terms page
recent checks (18) live · click to expand
TIME STATUS RESP CAUSE
○ DOWN 229ms bad_status: unexpected HTTP 429
● OK 224ms
● OK 202ms
● OK 245ms
○ DOWN 251ms bad_status: unexpected HTTP 429
● OK 233ms
● OK 209ms
● OK 174ms
○ DOWN 195ms bad_status: unexpected HTTP 429
● OK 169ms
● OK 176ms
● OK 147ms
○ DOWN 189ms bad_status: unexpected HTTP 429
● OK 180ms
● OK 158ms
● OK 162ms
○ DOWN 146ms bad_status: unexpected HTTP 429
● OK 184ms

EMBED THIS BADGE

Show that Web Search & Data API — SERP, page reader & scrapers is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

Web Search & Data API — SERP, page reader & scrapers listed on x402-list
status
Web Search & Data API — SERP, page reader & scrapers uptime on x402-list
live uptime
// 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
[![Web Search & Data API — SERP, page reader & scrapers on x402-list](https://x402-list.com/badge/hacker-news-stories-search.svg)](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>

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