x402 payment policy

411data accepts x402 micropayments in USDC on base. The first request to any paid route returns HTTP 402 with a canonical accepts[] envelope; settle via your wallet and retry with X-PAYMENT: <base64>.

Discovery

• /.well-known/x402 — JSON catalog of paid resources
• /openapi.json — OpenAPI with per-operation x-payment-info
• /developers — human-readable walkthrough with curl + Python examples

Free trial

Mint a wallet-bound agent at /connect for starting virtual USD credit (~$0.20). Anonymous traffic (no token) is capped at 20 req/hr/IP — the deterrent for casual scraping.