{"uid":"cap_CXVvle0lW0QURB-VDXTdI","slug":"neo-proof-of-publication-cc2fe328","name":"neo proof-of-publication","description":"Signed evidence that a public page said this at this time: sha256 of the fetched text, the text itself, final URL and status, logged in a public append-only log anchored daily on Bitcoin and Software Heritage.","url":"https://neo-collettive.onrender.com/x402/proof-of-publication?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string"}}},"responseSchema":{"type":"json","example":{"receipt":{"log":{"seq":12}},"signature":"...","content_sha256":"...","fetched_at_utc":"2026-10-24T08:00:00Z"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.5","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":"$0.5/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.5","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.5","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_AjwHq5G4pNOCi7bw1FVHh","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.5","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches a public URL, hashes its content, and issues a signed timestamped receipt logged in a public append-only log anchored on Bitcoin and Software Heritage","exampleAgentPrompt":"Can you create a proof-of-publication receipt for https://example.com/press-release.html — I need a signed, timestamped record with the page's SHA-256 hash logged in the public append-only ledger so I can prove what it said today?","exampleUseCases":[{"title":"Archiving a legal disclaimer before update","prompt":"Before our terms-of-service page changes next week, create a signed proof-of-publication for https://mycompany.com/terms so we have a Bitcoin-anchored record proving exactly what it said today."},{"title":"Verifying a competitor's public claim","prompt":"I need to lock in evidence of what this press release says right now — can you fetch https://competitor.com/news/2024-announcement and give me a signed receipt with the SHA-256 hash and log entry in case they edit it later?"},{"title":"Documenting a public blockchain audit result","prompt":"Our audit report is live at https://auditfirm.com/reports/project-xyz — please generate a proof-of-publication receipt with a signed log entry and content hash so we can show regulators the exact text that was publicly available on this date."}],"resultDescription":"A JSON object containing a signed receipt with the log sequence number, the SHA-256 hash of the fetched page text, the full fetched text, the final resolved URL, the HTTP status, and the UTC timestamp of fetch — all recorded as an immutable entry in a public append-only log anchored daily on Bitcoin and Software Heritage.","failureModes":["URL is unreachable or returns a non-200 status — receipt may reflect the error state","URL redirects to a private or paywalled page — fetched content may be incomplete or blocked","Very large pages may timeout or be truncated during fetch","URL points to dynamic content that differs between requests — hash captures one specific fetch","Network errors during anchoring may delay Bitcoin/Software Heritage confirmation"],"whenToPreferThis":"Choose this endpoint when you need cryptographically signed, blockchain-anchored evidence that a specific public URL contained specific content at a specific moment — especially for legal documentation, audit trails, content dispute resolution, or preserving fleeting public statements. Prefer this over simple screenshots or manual records because it produces a machine-verifiable SHA-256 hash with a signed receipt in a tamper-evident public log. It is distinct from neo timestamp (which timestamps an arbitrary hash you provide) because this endpoint fetches and hashes the live page itself.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T12:36:12.608Z","isFirstParty":false,"canonicalSlug":"neo-proof-of-publication-cc2fe328"}