{"uid":"cap_TSDhoyn1JNSGNcD2Rdc_K","slug":"notary-digital-signer-mcp-9faa4125","name":"Notary Digital Signer MCP","description":"The premier global index of 1,069 monetized MCP nodes across 205 specialized subdomains. Gasless USDC runtime settlements via x402 V2 Spec on Base L2. Save 95% token context.","url":"https://api.m2mcent.com/notary-digital-signer-mcp/api/process?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"success":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.2","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":"$0.2/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.2","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.2","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_bM8ik8mfG4IRZwGrhr8wp","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.2","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Digitally signs and notarizes data or documents, producing a cryptographic attestation of authenticity and integrity.","exampleAgentPrompt":"Can you digitally sign and notarize this document text for me so I have a cryptographic proof of its authenticity? Here's the content: 'This agreement between Alice and Bob dated June 1, 2025 confirms the transfer of 500 USDC.'","exampleUseCases":[{"title":"Notarize a legal agreement","prompt":"I need to notarize this contract text so it's tamper-proof and cryptographically certified — here's the content: 'Service agreement between Acme Corp and Vendor Inc, effective July 1, 2025, for $10,000 consulting services.'"},{"title":"Sign AI-generated content for provenance","prompt":"Can you digitally sign this AI-generated report so we have a verifiable record that this exact text existed at this point in time? The content is: 'Q2 2025 market analysis: revenue grew 18% YoY across all segments.'"},{"title":"Certify a data record for audit trail","prompt":"I need a cryptographic attestation for this audit log entry so we can prove it hasn't been tampered with: 'User admin@company.com deleted record #4821 at 2025-06-01T14:32:00Z.'"}],"resultDescription":"Returns a cryptographic digital signature and/or notarized attestation for the submitted data, proving its integrity and authenticity at the time of signing. Typically includes the signature value, signing timestamp, and metadata about the signing authority.","failureModes":["Empty or missing data field returns a validation error","Malformed input payload causes a 400 Bad Request","Service unavailability or timeout returns a 5xx error","Insufficient payment or x402 payment failure blocks the request","Excessively large data payloads may be rejected"],"whenToPreferThis":"Choose this endpoint when you need a cryptographic, tamper-proof digital signature or notarization of arbitrary string data or document content — especially in agentic workflows requiring provenance, audit trails, or legally-relevant attestations. Prefer this over simple hashing when you need a trusted third-party signing authority rather than just a checksum.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-17T12:41:35.619Z","isFirstParty":false,"canonicalSlug":"notary-digital-signer-mcp-9faa4125"}