PolicyCheck x402 Analysis API
Pay-per-request analysis over the x402 protocol: POST https://policycheck.tools/api/x402/analyze answers HTTP 402 with a PAYMENT-REQUIRED header carrying an x402Version 2 envelope — $0.03 (30000 atomic USDC) per analysis on Base mainnet (eip155:8453), scheme exact, 300 s timeout, plus a bazaar discovery extension with a JSON Schema for the request body (url, sellerUrl, text) and an example response. After payment the response wraps the /api/check analysis fields in a {payment, analysis} envelope with the on-chain receipt. Probed live on 2026-09-19; no payment was made.