{"uid":"cap_3svXz97h025ZeN8cC_a3z","slug":"forgemesh-notary-ai-inference-attestation-cbd13914","name":"ForgeMesh Notary — AI Inference Attestation","description":"Notarize AI output: a signed Ed25519 attestation of the model response plus sha256 content hash, receipt token, and Merkle anchor status for one AI inference — a cryptographic receipt for inference that lets you prove an AI said X and verify model output authenticity, checkable free by anyone, anytime.","url":"https://notary.forgemesh.io/api/notarize","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"prompt":{"type":"string","description":"Exact prompt/input sent to the model"},"metadata":{"type":"object","description":"Optional caller metadata, <= 4 KB — accepted but NOT persisted or hashed (reserved for future opt-in retention)"},"model_id":{"type":"string","description":"Model identifier, e.g. openai/gpt-5 or claude-fable-5"},"response":{"type":"string","description":"Exact model output being notarized"},"client_timestamp":{"type":"string","description":"ISO-8601 time the inference ran (optional; included in the content hash)"}}},"responseSchema":{"type":"json","example":{"anchor":{"status":"pending"},"model_id":"openai/gpt-5","algorithm":"ed25519","signature":"base64-ed25519-signature","receipt_url":"https://notary.forgemesh.io/api/receipt/att_0123456789abcdef01234567","content_hash":"9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08","notarized_at":"2026-07-03T12:00:01.000Z","receipt_token":"private-receipt-token","signer_pubkey":"base64-ed25519-public-key","attestation_id":"att_0123456789abcdef01234567","payload_stored":false,"client_timestamp":"2026-07-03T12:00:00Z"}},"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_xQirtcxCy7Fiuv3emMy3u","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":"Creates a cryptographic receipt for a single AI inference: an Ed25519-signed attestation, SHA-256 content hash, receipt token, and Merkle anchor status that proves an AI model produced a specific output.","exampleAgentPrompt":"Notarize this GPT-4o response for me — the prompt was 'Summarize the merger agreement' and the model output was 'The merger is valued at $2.4B with a 60-day close window'; use model ID openai/gpt-4o and timestamp 2025-06-10T14:32:00Z so I have a signed cryptographic receipt I can verify later.","exampleUseCases":[{"title":"Legal evidence of AI advice","prompt":"I need a notarized receipt proving that claude-3-5-sonnet-20241022 generated this contract summary — the original prompt was 'List all indemnification clauses' and the response was 'Section 9.1 indemnifies the licensor against third-party IP claims.' Timestamp it as 2025-06-10T09:00:00Z so it's legally defensible."},{"title":"Compliance audit trail for regulated AI outputs","prompt":"Our compliance team needs a signed attestation for every AI decision we log. Notarize this response from openai/gpt-4-turbo: the prompt was 'Is this transaction flagged for AML review?' and the model said 'Yes, flag for review — unusual cross-border pattern detected.' Client timestamp is 2025-06-09T18:45:00Z."},{"title":"Journalism fact-check provenance","prompt":"I want a cryptographic receipt showing that the model openai/gpt-5 produced this fact-check summary — prompt was 'Verify the claim: city unemployment fell 3% in Q1' and response was 'Bureau of Labor data confirms a 2.9% reduction, within rounding of the claim.' Please notarize it now so readers can verify the AI's exact output."}],"resultDescription":"Returns an Ed25519-signed attestation object containing: a digital signature over the content, a SHA-256 hash of the prompt+response+model_id+timestamp bundle, a receipt token (unique identifier for this notarization), and a Merkle anchor status indicating whether the record has been anchored to a Merkle tree. The receipt is publicly verifiable by anyone at any time at no cost.","failureModes":["Missing required fields (prompt or response absent) — returns 400 Bad Request","Malformed model_id format — returns 400 with validation error","Payload too large (metadata > 4 KB) — returns 413 or 400","Payment failure (x402 micropayment not settled) — returns 402 Payment Required","Invalid ISO-8601 client_timestamp format — returns 400","Service unavailable or signing key error — returns 500","Merkle anchor may be pending at time of response — anchor status returns 'pending' rather than confirmed"],"whenToPreferThis":"Choose this endpoint when you need a single-inference cryptographic receipt with a human-readable receipt token and Merkle anchoring — ideal for one-off notarizations where auditability, legal defensibility, or public verifiability of a specific AI output is required. Use the sibling bulk endpoint for high-volume batch attestation. Prefer this over generic logging or timestamping services when the signed Ed25519 attestation and SHA-256 content hash are specifically needed to prove model identity and output integrity.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:33:29.398Z","isFirstParty":false}