{"uid":"cap_dBgaUWmWq8QqqrFSfgcbh","slug":"phion-attest-signed-integrity-provenance-receipt-for-ai-agent-json-239932fc","name":"Phion Attest – Signed Integrity & Provenance Receipt for AI-Agent JSON","description":"Signed integrity, provenance and freshness receipt for AI-agent JSON","url":"https://phion.systems/v1/paid/attest","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema"},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_CF0I_Z7IPgFPgIzDqaX1O","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Issues a signed, hash-linked receipt attesting to the integrity, provenance, and freshness of AI-agent JSON payloads","exampleAgentPrompt":"Attest the integrity and provenance of this JSON payload my agent just produced — I need a signed, hash-linked receipt that proves it hasn't been tampered with and confirms when it was generated.","exampleUseCases":[{"title":"Multi-agent pipeline trust verification","prompt":"I need a signed integrity receipt for this JSON output my upstream agent sent me before I pass it along — can you attest its provenance and freshness so the downstream agent can trust it?"},{"title":"Audit trail for agent commerce transactions","prompt":"Before we finalize this agent commerce transaction, please generate a signed provenance receipt for the JSON data we're exchanging so we have a tamper-evident audit trail."},{"title":"Freshness proof for time-sensitive agent data","prompt":"Certify that this JSON payload from my agent is fresh and hasn't been modified since it was created — I need a signed receipt I can show to the receiving party to prove the data's timestamp and integrity."}],"resultDescription":"A signed, hash-linked receipt containing a cryptographic integrity hash of the submitted JSON payload, a provenance record identifying the issuing agent or system, a freshness timestamp, and a digital signature from phion.systems — enabling any downstream agent or system to independently verify that the payload has not been tampered with and was attested at a specific point in time.","failureModes":["Invalid or malformed JSON payload returns a 400 error with a schema validation message","Payment not received or insufficient USDC balance results in a 402 Payment Required response","Signature generation failure due to internal key unavailability returns a 500 error","Request timeout if payload is excessively large or server is overloaded","Replay of identical payload may produce a distinct receipt due to freshness timestamps, not be idempotent"],"whenToPreferThis":"Choose this endpoint when an AI agent needs a cryptographically signed, tamper-evident receipt for a JSON payload to establish trust with downstream agents, auditors, or counterparties — especially in multi-agent pipelines, agent commerce flows, or any scenario where provenance, freshness, and integrity of data must be independently verifiable. Prefer this over generic hashing utilities when you need a structured, signed receipt with provenance metadata rather than just a hash value.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:46:57.868Z","isFirstParty":false}