{"uid":"cap_hSMiAkW4dDhSCgBllgcMM","slug":"neo-log-witness-0d4bf297","name":"neo log-witness","description":"Recompute a hash-chained log ([seq, ts, kind, item, extra] rows, up to 5000) and get its size and head, signed and logged: a third-party witness line.","url":"https://neo-collettive.onrender.com/x402/log-witness?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"log":{"type":"string"},"entries":{"type":"array","maxItems":5000},"start_head":{"type":"string"}}},"responseSchema":{"type":"json","example":{"ok":true,"head":"...","size":1,"signature":"..."}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Z0WZk3Z2UCeCuZUG-qCQ5","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Recomputes a hash-chained log's integrity, returning its size and head hash with a signed third-party witness attestation.","exampleAgentPrompt":"Can you recompute the integrity of my hash-chained log and get a signed third-party witness attestation? Here are up to 5000 entries in the format [seq, ts, kind, item, extra], and the starting head is 'abc123def456'.","exampleUseCases":[{"title":"Audit trail integrity checkpoint","prompt":"I have a sequence of 200 audit log entries in [seq, ts, kind, item, extra] format — can you send them to neo log-witness to recompute the hash chain and get back a signed witness attestation so I can prove nothing was tampered with?"},{"title":"Append-only log state certification","prompt":"My agent system maintains an append-only activity log. After this batch of operations, can you get a third-party witness signature on the current log head and size so I have an external attestation of the log's state at this point?"},{"title":"Cross-system log continuity proof","prompt":"I need to hand off a verified log snapshot to another system — can you use neo log-witness to recompute the hash chain from the starting head 'f7e2b9c1' across these 500 entries and return the signed witness line I can attach as proof of continuity?"}],"resultDescription":"A JSON object with ok (boolean), the recomputed head hash of the log, the total log size (number of entries), and a cryptographic signature from neo acting as a third-party witness — serving as an externally-verifiable attestation of the log's integrity at that moment.","failureModes":["Hash chain recomputation fails if entries are malformed or missing required [seq, ts, kind, item, extra] fields","Exceeding 5000 entries limit returns an error","Invalid or mismatched start_head causes chain verification failure","Network timeout on large entry batches","Malformed JSON input schema returns 400-level error","Service unavailability on Render.com hosting platform"],"whenToPreferThis":"Choose this endpoint when you need an independent, cryptographically-signed third-party attestation of a hash-chained log's integrity — not just local verification. Ideal when you need to prove to external parties that a log was intact at a specific moment, for audit trails, compliance checkpoints, or handoffs between systems. Prefer over self-signed solutions when external witness trust is required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T12:35:21.938Z","isFirstParty":false,"canonicalSlug":"neo-log-witness-0d4bf297"}