64 pay-per-call APIs that AI agents pay for autonomously — via the x402 protocol (USDC on Base). No account, no API key, no subscription: the agent gets an HTTP 402, signs a micro-payment, retries, gets the data. Settlement is on-chain, per call, from $0.002.
Live at api.x-402.online · MCP: online.x-402/mcp on the official registry and Smithery
Free taste, no wallet — every client gets 1 free call per day on any data route ≤ $0.01. Just call:
curl "https://api.x-402.online/v1/weather?city=Tokyo"
curl "https://api.x-402.online/v1/crypto/price?ids=bitcoin,ethereum&vs=usd"Paid, with any x402 client (funded USDC wallet on Base):
import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
import { ExactEvmScheme } from "@x402/evm";
import { privateKeyToAccount } from "viem/accounts";
const f = wrapFetchWithPaymentFromConfig(fetch, {
schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(privateKeyToAccount(PRIVATE_KEY)) }],
});
const r = await f("https://api.x-402.online/v1/search?q=x402"); // $0.003, settled on-chain
console.log(await r.json());| Category | Routes | From |
|---|---|---|
| 🤖 LLM inference | prompt in, completion out (DeepSeek v4) — among the cheapest $/call on x402 | $0.002 |
| 🔎 Web + news search | real Google results (organic + answer box + knowledge graph) & fresh news | $0.003 |
| 🕸️ Residential-IP scraping | extract, render (JS), screenshot, PDF, links, meta — through a French residential IP, reaches sites that block datacenters | $0.005 |
| 🌍 Utilities | weather (worldwide), crypto prices, DNS, email validation, IBAN | $0.003 |
| 🇫🇷 French business data (deepest x402 coverage) | company identity (SIREN/SIRET), annual accounts (INPI), insolvency (BODACC), KYB + VIES VAT, credit-style score, director networks, competitors | $0.003–0.12 |
| 🏠 French real estate | DVF sale-price valuations, DPE energy, risks, investment scorecard | $0.02–0.08 |
| 🇬🇧🇺🇸 UK / US | Companies House, SEC EDGAR filings & financials | $0.005–0.08 |
| 🧩 Composites | entreprise-360, KYB dossier, location studies — several sources in one call | $0.02–0.12 |
Full machine-readable docs: /llms.txt · /openapi.json · /.well-known/x402
- Every route accepts GET and POST (query params or JSON body — your call)
- Progressive pricing: big composites have a
/partialLITE version from $0.02; every402response advertises the cheaper alternative and free trial in analternativesfield - MCP server at
/mcp(JSON-RPC, Streamable HTTP): 64 tools, x402 payment relayed end-to-end — proven on-chain - Multi-surface discovery: Bazaar extensions,
llms.txt, OpenAPI, agent-skills,Linkheaders
Vercel (paywall x402 + fast APIs) → Cloudflare named tunnel → Mac mini worker (residential IP, real Chromium, auth-gated sources like INPI) with automatic datacenter fallback. Analytics + a daily on-chain market radar (unique payers per service across the whole x402 ecosystem) drive which APIs live or die.
Express · @x402/express (multi-network resource server) · Coinbase CDP facilitator · Supabase (analytics) · Playwright · deployed on Vercel + a Mac mini.
Built by Laurent Halbrun. USDC revenue wallet: 0x2c87…735F — every sale is verifiable on-chain.