{"uid":"cap_xEm6obHyrlBhGISfNitof","slug":"khotem-notary-audit-session-verification-2327688b","name":"KHOTEM Notary Audit & Session Verification","description":"Paid cryptographic witness services for autonomous agents and humans: seals, attestations, verification, audit, sealed document thread. x402-native micropayments, USDC on Base / Polygon / Solana, direct on-chain verification. No accounts, no API keys, no KYC.","url":"https://khotem.com/api/audit","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"type":"object","properties":{"body":{"type":"array","items":{"type":"object","required":["seal"],"properties":{"seal":{"type":"object","required":["root"],"properties":{"root":{"type":"string","description":"merkle root hex"}}}},"description":"Session object. All fields except \"seal\" and \"_\"-prefixed are hashed into leaves; seal.root must equal the merkle root."},"description":"Array of session objects, same shape as /api/verify"}}},"output":{"type":"object","properties":{"example":{"ok":3,"total":5,"results":[{"ok":true,"root":"9f2c…"},{"ok":false,"reason":"root_mismatch"}],"verdict":"✗ TAMPERED","payment_seal":"a1b2c3d4e5f60708","verdict_seal":"1020304050607080"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.15","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":"$0.15/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.15","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.15","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_SafsY1ykvziif3OCOppxZ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.15","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Performs SEAL-based notarization, session verification, and audit logging for documents or events, paid per-call via USDC on Base with no signup or KYC required.","exampleAgentPrompt":"I need to notarize and seal this session record for our audit — submit it to KHOTEM's audit endpoint and pay the $0.15 USDC fee on Base so we get back a tamper-proof seal and audit record.","exampleUseCases":[{"title":"Tamper-proof contract timestamp","prompt":"I just finalized this contract hash and need to seal it with a notary timestamp right now — use KHOTEM to create a verifiable audit record and pay the 15-cent USDC fee on Base."},{"title":"Session integrity verification","prompt":"We had a user session complete a critical action and I need a cryptographic audit record proving the session was valid — run it through KHOTEM's seal verification and pay with USDC on Base."},{"title":"Compliance audit trail entry","prompt":"Add a KHOTEM notary seal to this compliance event record so we have an immutable audit entry — pay the $0.15 USDC on Base and return the seal proof to me."}],"resultDescription":"Returns a SEAL notarization proof, timestamped audit record, and verification result confirming the submitted data was sealed at the time of the call — including a unique seal identifier and audit entry that can be used as tamper-proof evidence.","failureModes":["Payment not received or insufficient USDC balance — endpoint returns 402 Payment Required","Malformed or missing audit payload — endpoint returns 400 Bad Request","Network issues on Base blockchain causing payment confirmation delay","Duplicate submission may generate a new seal rather than idempotent result","Invalid session data format rejected with validation error"],"whenToPreferThis":"Choose this endpoint when you need lightweight, pay-per-call notarization or audit sealing without account registration, KYC, or subscription. Ideal for agents that need occasional tamper-proof timestamps or session verification and want to pay programmatically in USDC on Base. Prefer over traditional notary APIs when anonymity and on-chain payment are priorities.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:41:59.149Z","isFirstParty":false}