Use when an agent wants a one-label check before paying an x402 URL or seller domain: checks_passed, check_first, checks_failed or no_data, with as-of date, evidence window, conclusive test-buy count, last delivered/failed dates, reason codes, and evidence and appeal links. Same data and signing key as the free /v1/check. Observed on-chain payments appear as ranges only (unverified; no payer addresses or amounts). Not charged on bad input. Observations, not a guarantee.

Payment Options