{"uid":"cap_Cl-uSTpLCaerQVGuwhGaX","slug":"taskhawk-kevros-provenance-attestation-6191f6c2","name":"TaskHawk Kevros Provenance Attestation","description":"Prove what you did — hash-chained provenance attestation","url":"https://governance.taskhawktech.com/governance/attest?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":["agent_id","action_description","action_payload"],"properties":{"agent_id":{"type":"string","description":"Agent identifier"},"action_payload":{"type":"object","description":"Action details"},"action_description":{"type":"string","description":"What was done"}}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json"],"type":"string"}}}}},"responseSchema":{"type":"json","example":{"hash_curr":"a1b2c3d4e5f6...","hash_prev":"0000000000000000","chain_length":1,"attestation_id":"att_001"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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_IZgdF_LH-NJMbZVc1RaL2","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":"Creates a hash-chained attestation record proving what an agent did, linking each action into a verifiable provenance chain","exampleAgentPrompt":"Record a hash-chained provenance attestation for agent 'agent_xyz' proving it just executed a data transfer action — the action description is 'transferred 500 records from source DB to destination warehouse'.","exampleUseCases":null,"resultDescription":"Returns a JSON object containing the current action's hash (hash_curr), the previous chain link hash (hash_prev, all zeros if first entry), the cumulative chain_length, and a unique attestation_id — together proving the action's place in an immutable provenance chain.","failureModes":["Missing agent_id returns 400 with validation error","Malformed action_payload object returns 400","Chain integrity failure if prior hash is corrupted returns 500","Payment not received returns 402 requiring x402 micropayment of $0.02 USDC","Service unavailable returns 503 if hashing backend is down"],"whenToPreferThis":"Use this endpoint when you need cryptographic, hash-chained proof of what an AI agent did — not just a log entry, but a verifiable provenance record where each action is linked to the previous one. Ideal for compliance, audit trails, multi-step agent workflows requiring tamper-evident records, or when downstream systems need to verify agent behavior. Prefer this over generic logging when the integrity and unchainability of the record matters.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T06:36:20.194Z","isFirstParty":false,"canonicalSlug":"taskhawk-kevros-provenance-attestation-6191f6c2"}