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X402 · Preflight

x402 seller preflight: check a paid endpoint BEFORE paying. Probes it unpaid, parses the 402 (v2 header or v1 body) and checks each option: scheme, network, asset is real USDC on Base, EIP-712 name/version match on-chain, payTo not a burn address, amount, timeout, discovery metadata. Plus on-chain seller reputation: USDC payments to payTo over 1-7 days (distinct payers, total, last payment). Returns verdict ok/caution/fail, issues and the recommended option.

GET https://nightshift-x402.nightshift-labs.workers.dev/v1/x402/preflight

0.005 USDC on Base · payTo 0xb5aFc89b57Fa8270bB7261348179D28099BEa2a0

Status: unverified (probe-pending)

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

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