x402 Data API

Pay-per-call real-time crypto market-data API for autonomous agents and trading bots. Covers 16 assets with derivatives intelligence (funding rates, open interest, basis), liquidation cluster maps, options implied volatility, multi-source spot pricing, macro context, and ML price forecasts. No API keys required — x402 USDC micropayments on Base mainnet. Prices range $0.001-$0.10 per call.

Daily building permits from Tampa Bay, Florida: City of Tampa, City of Clearwater, and Hillsborough, Pinellas, Pasco and Manatee counties. Roofing and HVAC first. Search by trade, area, job value and date, plus full histories for a permit, a property or a contractor. Pay per query in USDC on Base via x402 ($0.01 to $0.10). Free /coverage and /sample.

Extracts live product catalogs, pricing tiers, SKU variants, and stock availability from any Shopify or e-commerce storefront.

Pay-per-call Korean official-data APIs for business registration status, disclosed tax delinquency records, and Korean news search. x402 v2 with USDC on Base mainnet.

225 pay-per-call tools for AI agents, paid per successful call in USDC (Base, Solana, Arc) with x402; failed calls are never charged. Web page to Markdown, PDF and OCR, SEO and security checks, company registers and sanctions screening, SEC filings, multi-chain RPC and token data, prediction markets, crypto prices, translation, speech to text, LLM text tools. Also a remote MCP server at /mcp.

Extracts normalized product catalogs, live prices, variants, and availability from online stores.

Agents buy per-signal bundles via x402 and get pushed (Telegram) the instant a city's daily-high temperature crosses into a new Polymarket bucket — market URL, old/new reading, and live odds for every bucket. 37 cities.

Extracts live product catalogs, pricing tiers, SKU variants, and stock availability from any Shopify or e-commerce storefront.

359 pay-per-call HTTP tools for AI agents on one host: web search and page extraction, cited answers, crypto and DeFi market data, on-chain analysis and contract risk, security and breach checks, US government and regulatory records, and enrichment. No account and no API key - an unpaid request returns an HTTP 402 quote, pay with an X-PAYMENT header and the call is served. USDC on Base; the same catalog is also served over Solana on payai.agentstools.dev.

Pay-per-call lookup utilities: DNS records, email deliverability and domain checks, Docker Hub image tags, keyword monitoring and bulk variants. Accepts Base mainnet and Base Sepolia.

Has a ransomware group claimed this company or domain? Pay-per-call leak-site claim lookups ($0.01), newest claims, optionally per group ($0.01), and ransomware group profiles ($0.02) from the Dragons Eye ransomware tracker, paid in USDC on Base over x402 with no API key. Every result is an unverified claim from a criminal leak site. Also a remote MCP server at /mcp.

Pay-per-call inspection APIs for AI agents: PDF page count/title/text preview (5MB), CSV structure inspection, image inspection, and URL probing. Pay in USDT on Arbitrum via x402; no API key, no signup.

Pay-per-request network utilities for agents via x402 V2 (USDC on Base). Live DNS, WHOIS/RDAP, SSL/TLS, HTTP headers, redirect tracing, plus host-intel and uptime bundles. No API keys. Not @x402/fetch. Catalog: https://api.fetchx402.com/v1/catalog Docs: https://api.fetchx402.com/docs Probe example: GET /v1/tools/dns?domain=example.com

Live on-chain data about JPYC (the Japanese yen stablecoin) and curated Japan Web3 directories for AI agents, paid per request in USDC on Base via standard x402 (exact scheme, facilitator: Coinbase CDP). Endpoints: JPYC supply by chain, wallet balance, recent transfers, 24-hour network activity, weekly change feeds for JPYC services and Japanese stablecoin payment providers, and sourced directories of Japan Web3 services and JPYC-accepting stores. Facts only, no advice; every directory row has an official source URL and last-verified date.

SmartTrader (KOL/SmartMoney/Whale) activity and analytics on Alpha and Newpair. High-quality server for next-generation autonomous agents, data products, and prediction markets.

Returns a US consumer demand signal built from Census retail and food services sales: headline sales with month and year trends, core spending excluding autos and gasoline, e-commerce versus restaurant spending, and a 13 sector year over year breakdown.

First-party data from a publicly documented, AI-operated business experiment, sold per call in USDC on Base. Real AI Economy Index (daily x402 vs gross USDC volume, payers, category revenue, catalog census, 90-day archive), a first-client playbook pack for AI automation freelancers, a sourced dataset of free-tier commercial-use limits for 44 AI image/voice/music/video tools with change log, and the full 106-post corpus as JSON. Free headline versions stay free at /api/ai-economy, /api/first-client and /llms.txt.

Pay-per-call DNS and domain lookup API with six endpoints: A, TXT and MX records, WHOIS text, parsed RDAP registration data and DNSSEC status, all returned as structured JSON. Flat $0.005 per call, payable on Base or Solana.

Deterministic utility APIs paid per request with x402 on Base.

Pay-per-request US real estate data API: rental and for sale listings, property records with attributes, taxes and owner, value and rent estimates, market statistics by postal code. MLS data supplied upstream by RentCast.

Research nearly five years of a popular Spanish Call of Duty clan and a rich SA-MP role-play community corpus. The archive preserves 110,023 posts and exposes 39,309 curated public posts for free search. Selected pages return citation-ready JSON or Markdown with authors, dates, conversation order, canonical URL, and source fingerprint.

Source-cited library on AI agent payments (L402, x402, Lightning, stablecoins). Paid search, change feed, updates and digest endpoints: 0.01 USDC per request on Base via x402, or L402 (100 sats for 100 credits).

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.

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

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.