{"uid":"cap_gVezl6IPR36qFMBEeyFnJ","slug":"fractalai-x402-notary-72001fc0","name":"FractalAI x402 Notary","description":"FractalAI Notary: pay for an independent ML-DSA-65 attestation of an x402 settlement.","url":"https://fractalai.net.co/api/x402/witness?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object"},"type":{"type":"string","const":"http"},"method":{"enum":["POST","PUT","PATCH"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"queryParams":{"type":"object","additionalProperties":{"type":"string"}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_EopQEQUZOEZn6RrhivvVN","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Provides an independent ML-DSA-65 post-quantum attestation of an x402 payment settlement, acting as a cryptographic witness for the transaction.","exampleAgentPrompt":"Can you get an independent ML-DSA-65 notarization of this x402 settlement — POST the JSON body of the completed payment to the FractalAI Notary so we have a post-quantum witness signature on record?","exampleUseCases":[{"title":"Audit trail for agent payment","prompt":"After our AI agent completes an x402 payment, get a FractalAI post-quantum notarization of the settlement so we have an independent cryptographic witness on file for the audit log."},{"title":"Dispute-proof payment evidence","prompt":"We just settled an x402 transaction and need tamper-proof proof it happened — can you send the payment body to the FractalAI Notary to get an ML-DSA-65 attestation we can use if there's ever a dispute?"},{"title":"Regulatory compliance attestation","prompt":"For compliance purposes, I need every x402 payment our system makes to be independently attested with a post-quantum signature — submit this settlement JSON to the FractalAI x402 Notary and return the witness certificate."}],"resultDescription":"An ML-DSA-65 post-quantum cryptographic attestation (witness/notarization) of the submitted x402 settlement payload, providing an independent third-party signature confirming the transaction occurred.","failureModes":["Invalid or malformed x402 body returns a validation error","Missing required fields (type, method, bodyType, body) causes a schema rejection","Payment failure (insufficient USDC balance) results in a 402 response and no attestation","Unsupported HTTP method (not POST/PUT/PATCH) causes an enum validation error","Network timeout if the blockchain layer is unavailable"],"whenToPreferThis":"Choose this endpoint when you need an independent, post-quantum (ML-DSA-65) third-party notarization of an x402 payment settlement — particularly for audit trails, compliance records, or dispute resolution where a tamper-proof cryptographic witness signature from a separate party is required. Prefer over self-attested records or weaker signature schemes.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T12:33:44.104Z","isFirstParty":false,"canonicalSlug":"fractalai-x402-notary-72001fc0"}