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X402 · Preflight

One-call Base (8453) preflight: risk snapshot + live ERC-20 approvals + OFAC SDN screen + optional x402 invoice check (?invoice= JSON or base64). Returns risk, approvals, invoice, sanctions and summary {verdict proceed|review|stop, flags}. Free sample: /api/preflight/sample. 400 bad input; 503 not charged. Informational, not a guarantee.

GET https://x402-research-iota.vercel.app/api/x402/preflight

0.05 USDC on Base · payTo 0xa26f179e42836bc4ae0cea997fdfc9602d5b8147

Status: unverified (probe-pending)

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

Payment routes