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X402 Preflight

x402 preflight: checks a paid x402 endpoint before a payment is signed. Probes it unpaid, parses the v1 body or v2 PAYMENT-REQUIRED header, lints every accepts[] option (network, canonical USDC, EIP-712 domain name/version that signatures verify against, EIP-55 payTo, zero payTo, amount, timeout, testnet, resource host) and returns ok/warn/block with reasons. Input: URL, optionally 'POST <url>'. Deterministic, no LLM.

POST https://minty-sprout.onrender.com/v1/x402-preflight

0.005 USDC on Base · payTo 0x11DCED0487cA3E7d9032029DCb302253ccF4e0DE

Status: unverified (probe-pending)

Settlement: direct to the seller's payTo — 0% HIVE402 take

Payment routes