{"uid":"cap_SByT37FJC6rSS6jV2T2Aa","slug":"gateway-apiosk-com-attestations-78547a5f","name":"gateway.apiosk.com Attestations","description":"Create a signed JWS receipt containing payload hash, result hash, timestamp and validation results.","url":"https://gateway.apiosk.com/attestations/attest","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.022","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_pmtGzFyu3lqaRNv1T8-GL","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Hashes a JSON payload and creates a cryptographically signed attestation (JWS) with optional validation results, persisting the receipt.","exampleAgentPrompt":"Create a cryptographic attestation for this JSON payload: {\"order_id\": \"ORD-9921\", \"amount\": 250.00, \"status\": \"approved\"} and include the validation result {\"passed\": true, \"checks\": [\"schema\", \"fraud\"]} in the receipt so I have a signed, persisted proof.","exampleUseCases":null,"resultDescription":"Returns an attestation object with a unique attestation ID (e.g. att_example), a boolean ok status, a JWS-encoded cryptographic signature over the payload, a SHA hash of the payload, and a persisted flag confirming the receipt was stored.","failureModes":["Invalid or non-parseable JSON payload string returns an error","Missing required payload field results in a 400-level error","Payment not completed (x402 flow) results in 402 Payment Required","Service unavailable or persistence failure returns ok:false","Malformed validation_results string may cause parsing errors"],"whenToPreferThis":"Use this endpoint when you need a cryptographically signed, persisted attestation of a JSON payload — for audit trails, compliance records, or tamper-proof proofs of data at a point in time. Prefer this over simple hashing when you need a JWS signature and a persistent receipt you can reference by ID later.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:57:16.365Z","isFirstParty":false}