x402 Data API

Pay-per-call API over US WARN Act layoff filings on Base: company search and profiles, event severity, amendment history and relationships, state and county rollups, plus briefs on downstream sector impact. Endpoints priced $0.01 to $0.25, no signup.

Xynaptic is a 200-endpoint pay-per-request data & AI API for autonomous agents — no API key, no signup, no subscription. Live crypto market data, quant analytics, wallet screening and pre-purchase token audits; French company intelligence (official registry, KYB, LEI); US & EU securities; banking/card utilities (IBAN/BIN validation, sanctions screening, payment risk, supplier compliance, used-car dealer check); French jobs (live France Travail offers, BMO recruitment tensions); official real-estate transactions (DGFiP DVF); health data (openFDA, ClinicalTrials.gov, PubMed, French RPPS); energy (RTE live demand, ENTSO-E spot prices, EV charge windows, battery arbitrage); commodities and industrial prices; transport (FAA NOTAMs, SNCF real-time); plus the first x402-paid agent SKILLS (SKILL.md methods chaining catalog services: supplier due diligence, payment fraud screening, crypto token audit). Prices from $0.001 to $0.50 per request in USDC via x402 on Base, Solana or Polygon.

Property and place reports from cited public records: parcel lookup, flood zone, permits, crime, air quality, PFAS, electricity context, assessments and satellite change.

Pay-per-call scraping API for LinkedIn, Instagram, TikTok and TikTok Shop profiles and content, plus job posting search across multiple job boards. Price per record is declared in the 402 response, paid in USDC on Base.

Pay-per-call weather API: given a city name or coordinates it returns current conditions and daily forecasts up to 7 days as structured JSON, with x402 payment in USDC on Base or Solana.

Japanese public holidays, holiday lookup, and business-day calculation (skip weekends + national holidays). x402-enabled for AI agents that schedule, bill, or plan around the Japanese calendar.

Pay-per-request YouTube transcripts, cited evidence search, and context chunks for autonomous agents. Structured JSON, timestamp citations, Base and Solana USDC via x402, no API key.

Verified grounding data on 60 niche fashion subcultures for AI agents and RAG: years, key brands, iconic items, where to buy, price range, and a WARNING on what each must not be confused with. $0.01 USDC per record; free catalog (/api/catalog) and sample (/api/sample). MCP server: npx -y underindex-mcp.

Measured liquidation intelligence for AI trading agents: real exchange-reported liquidation levels from live Hyperliquid positions, plus observed CEX liquidation events across Binance, OKX, Bybit, BitMEX, Gate and HTX. Pay-per-call JSON over x402 on Base. Measured, not modeled.

17 pay-per-call endpoints on Base (USDC, x402 v2, Coinbase facilitator): web page to Markdown reader, FX and crypto rates, Argentine CUIT/CUIL validation, addresses, official gazette search and BCRA indicators, Spanish translation, formal letters and evidence-bound summaries, plus an x402 ping and x402 adoption stats. Free samples at /api/<route>/sample; every settlement is public at /receipts.json with its Base transaction hash.

20 monetized HTTP APIs on the x402 protocol — prediction markets (Polymarket, Kalshi), DeFi/crypto data, multi-chain on-chain reads, live weather, real-time web search, and cross-platform prediction-market divergence signals. No API keys or signups: call any route, receive an HTTP 402 with the exact USDC price, sign a payment, retry, get the data back. Payments settle on Base, Polygon, Arbitrum, or Solana.

Inspects live IPv4/IPv6 DNS resolution, TLS certificate issuer/expiry, and HTTP security grade.

Pay-per-call aesthetic-medicine data over x402 (USDC on Base). /x402/brands: brand directory, partially verified, 0.001 USDC per call. /x402/products: classified aesthetic-medicine products from the public EUDAMED UDI-DI list (dermal_filler, skin_booster, thread_lift, implant), 0.002 USDC per page. /x402/regulatory/eu/devices: aesthetic-medicine subset of the public EUDAMED UDI-DI list, 0.002 USDC per page.

Pay-per-call API gateway: keyword data and paywalled content via x402 USDC micropayments on Base (from $0.05/call).

A row of x402 micro-services: Base wallet reads, tx decoder, page fetch, seller tools, scheduled change detection with prepaid packs, and a fleet-wide prepaid Fleet Pass.

Real-time crypto market data for AI agents: prices, perp funding rates and predictions, volatility, liquidation levels, correlation, on-chain vs CEX spreads, technical indicators, sentiment, plus differentiated institutional signals (trader positioning, spot ETF flows, macro/on-chain context, supply). NEW: /api/market-pulse bundles the eight most-polled signals into one call for $0.018 — 18% cheaper than the $0.022 the parts cost, and one settlement instead of eight, which matters when the facilitator pays the gas. Pay-per-request in USDC on Base via x402 - no account, no API key. Self-hosted facilitator. MCP endpoint and A2A agent card included.

Korean mobility and EV supply-chain intelligence, sold per query. Structured feed tracking Korea's automotive-electronics and robotics supply chain - batteries and battery materials, EV components, robot parts, actuators and reducers, semiconductors, and tier-1 suppliers to Hyundai/Kia - written from Korean primary reporting and DART filings English-language sources do not cover. FREE TIER: depth=index returns slug, date, category, title and facets at any limit with no payment, so you can browse the whole corpus before buying. Paid: brief (+summary +KPIs) $0.025/item, full (+body +sources) $0.125/item, plus a $0.012 base fee that is waived on cursor continuations. Empty results are free. Filter by date, category and keyword; content is Korean and common English terms are auto-mapped to Korean. USDC on Base or Polygon. Machine-readable at /llms.txt, /openapi.json and /.well-known/agent.json.

Web intelligence API for AI agents: stealth fetch to clean markdown ($0.001), JS rendering, 17 structured extractors (Twitter, GitHub, Amazon, SEC EDGAR, CoinGecko...), document parsing, company enrichment by domain ($0.02), multi-source research and domain availability checks. x402 v2, USDC on Base, no API keys. MCP server: npx @clawfetch/mcp.

Real-time Strait of Hormuz crisis data for AI agents: full vessel manifest with OFAC sanctions cross-reference, full-resolution transit and index history, one-call situation snapshot, and the complete daily brief. $0.01-$0.02 per request in USDC on Base, no key or account.

Pay-per-call public web page tools for AI agents. POST /v1/extract returns JSON fields from a public page matching your JSON Schema ($0.01, charged only when ok is true). GET /v1/fetch returns a public page as markdown ($0.01). GET /v1/fees/base-exact returns the PayAI exact-scheme settle fee on Base ($0.005). x402 v2, USDC on Base, no account or API key.

Finance reference lookup across nine .wiki sites plus 30 deterministic formulas - options pricing and Greeks, bond risk, performance ratios, VaR, IRR, fund multiples, deal math and the NYSE trading calendar - each computed with a verifiable sha256 receipt. MCP and REST. Free tier needs no key.

Helps AI agents pay less for x402 services: the cheapest WORKING service for a task (live price, uptime, speed across ~25,000 paid APIs), plus a free pre-payment check that flags broken services, price mismatches and cheaper equivalents.

Korean crypto market data for AI agents: Upbit and Bithumb prices, kimchi premium, USD/KRW rate, arbitrage scanning across 189+ tokens, and AI sentiment built from Korean news. Pay per request via x402 on Base, Polygon or Solana.

Inspects live IPv4/IPv6 DNS resolution, TLS certificate issuer/expiry, and HTTP security grade.

Verified, CLDR-versioned locale formatting for 120+ locales: currency amounts, numbers and dates per the official CLDR rules (de-CH apostrophe grouping, en-IN lakh, ja-JP zero decimals, Arabic-Indic digits), raw per-locale rules, and a /verify endpoint that checks YOUR formatted string against the canonical CLDR output before it lands in an invoice or document. Every response carries the CLDR/ICU version for auditability. $0.001 per call, USDC on Base via the Coinbase CDP facilitator. Free locale list.