x402 Data API

Signed multi-exchange crypto prices. Each response carries a signature that can be checked against Pulse's published keys.

Paid x402 API from x402scan returning its ecosystem datasets: merchants, resources, buyers, facilitators and origin registry, priced per call in USDC on Base.

26 outcome-first machine services for autonomous agents over x402 V2 on Base USDC, led by AveDaris-routed Company Intelligence with public evidence, provenance, and bounded fulfillment; deterministic data, web, DNS, and payment-preflight utilities remain available as building blocks. Published from the canonical AveDaris runtime catalog.

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

Independent ledger of AI-agent money on Base. Nine x402 evidence packs (1 to 25 cents USDC) about any ERC-8004 agent or receiving address: liveness rank with evidence, where it pays, our public drain rule applied, logged incidents, peer agents, a fresh re-probe, hash-chained signed statement history, and who paid an address. Every pack is dated and carries definition ids; the free JSON API and a read-only MCP server sit beside them.

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.

Pay-per-query intelligence API for onchain finance: pre-trade token safety verdicts on Solana and EVM, RWA and tokenized asset data, crypto regulation summaries, ETF flow figures and a terminology decoder, all returned as structured JSON.

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

AARN provides agent-native web access APIs over x402 v2 on Base USDC. Read a public webpage as clean, LLM-ready Markdown or plain text (Web Read, 0.002 USDC/call), or extract structured content from 1–5 public URLs for RAG ingestion, summarization and research (Web Content Extraction, 0.005 USDC/call). No API key or signup required. Evidence-backed Web Research is also available when enabled. Developer quickstart and Python/JavaScript buyer examples: https://aarn.space/get-started/

Pay-per-call x402 API by SuVerse Labs with around 500 data endpoints (crypto prices, DeFi TVL, FX rates, weather, IP geolocation, prediction markets) wrapping public sources. Settles in USDC on Base, Solana and Noble, typically $0.05 to $0.10 per call.

FDA drug-approval catalyst change stream for US-listed biotechs: every state change of every catalyst we track — each PDUFA date as it is set, extended and resolved — with the real outcome (approval or CRL), the SEC filing quote and its EDGAR source. A superset of the upcoming calendar, as a since-cursor delta feed. Date accuracy AND coverage are published free at GET /v1/accuracy — audit before you pay. Flat price per request.

Locus wrapper on Apollo: people and organization search and enrichment, paid per call.

Companies House + FCA company verdicts, UK procurement fit-scores from Find a Tender and Contracts Finder, GOV.UK grant eligibility. Built for AI agents, no signup, no API key.

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.

Domain intelligence lookups: WHOIS, multi-resolver DNS, SSL/TLS certificate, technology stack, security headers, subdomain discovery and redirect chain. Each check is available on its own, or combined into a single full report. Paid per call in USDC on Base or Solana.

Measured intelligence for Robinhood Chain (chain 4663): every X caller and deployer graded against real on-chain price since chain genesis. Caller accuracy records, deployer reputation, labeled holder-structure diffs, the social tape, and a full token dossier - inputs for trading agents, not predictions. Per-call x402 (USDC on Base), no API key, no signup. Machine catalog at /.well-known/x402; hosted MCP at /mcp.

Podcast intelligence for AI agents: transcripts and semantic search across episodes, guests and appearances, chart rankings, advertising and sponsor analytics, political-bias and brand-suitability analytics, plus companies, people and topics as one knowledge graph. 100+ REST endpoints and an MCP server (mcp.particle.pro) payable per request in USDC on Base via x402 v2 (Coinbase CDP facilitator), $0.01 to $0.04 per call, no API key or signup. Capability manifest at /.well-known/x402, x-payment-info on every payable operation in /openapi.json, Bazaar declarations on every 402.

Unofficial Apple App Store data API: search apps by term, fetch app details by product id, and pull user reviews. Returns developer, price, rating, genres, screenshots and version history as JSON. $0.02 per call in USDC on Base.

Pay-per-call data & utility API for AI agents — 40+ endpoints, USDC on Base via x402, from $0.001. Web scraping & summaries, PDF/DOCX/CSV extraction, crypto prices & market reports, IP geolocation & timezone, DNS & email checks, SEO / accessibility / schema.org audits (page & whole-site), music metadata & cover art, icon / logo / brand-kit / OG-card generation, image vectorization, multi-page website builds, a wallet-keyed agent datastore, and a machine message board. No accounts, no API keys.

Pay-per-call services for agents over x402 (USDC on Base or Solana, no API key): annual SEC financial facts by CIK with filing links, CSV validation against typed column rules, citation source-overlap checks, static web page text extraction, and browser-rendered extraction for pages that need JavaScript. OpenAPI with schemas and examples at /openapi.json; llms.txt and pricing at the root.

Radio-frequency positioning DePIN for AI agents: pay-per-call location APIs (estimate a position from cellular observations) plus receiver-node registration and status. USDC on Solana and Base, x402 v2, with machine-readable discovery at /.well-known/x402 and a catalog at /api/x402/catalog.

European government reference data as clean, cited JSON: ECB and Bank of England policy rates, VAT with reduced and zero bands, corporate and personal income tax, minimum wages, CPI inflation, statutory late-payment interest, official central-bank FX fixes and public holidays across 34 countries plus EU-level rates. Every value returns with the official source URL it was verified against, the date it took effect and the date we last checked it, so an answer can be audited rather than trusted. Each series also declares how it was obtained — GET /catalog?confidence=primary returns only values with no recorded verification limitation. Out-of-scope questions are refused free, with an explanation, rather than guessed. Also served: sub-national holiday calendars for Germany's 16 Länder and the four UK nations, point-in-time reads via ?as_at=YYYY-MM-DD, and settlement-date conventions including the enacted EU T+1 transition from 11 October 2027. Finished jobs, one paid call returning one cited dossier: cost this hire ($0.50, POST /v1/jobs/cost-hire: wage-floor verdict, employer and employee contributions, total employer cost and first working day for Germany, Spain, the UK, Italy and Poland) and charge this sale ($0.50, POST /v1/jobs/charge-sale, or $0.75 with a signed certified extract of the governing rate: whether to charge VAT, which country's and how much, under EU, UK and South African place-of-supply rules). Anything that cannot be answered in full is refused free, with no charge. One free catalog of all seven regional brands: https://afriref.dev/fleet/catalog.json. Paid per call in USDC on Base via x402 or MPP, no key, no signup. Public holidays are free.

Extracts verified emails, social links, 40+ tech stack signals, pricing tiers, and company summary for GTM & research agents.

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.