{"uid":"cap_uOsTRtl53RJbV8lz77zCn","slug":"khotem-notary-session-verification-ac2444d9","name":"KHOTEM Notary & 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/verify","method":"POST","headers":{},"bodySchema":{"type":"object","required":["seal"],"properties":{"seal":{"type":"object"}}},"responseSchema":{"ok":1,"total":1,"results":[{"ok":true,"root":"9f2c…"}],"verdict":"✓ ALL VERIFIED","payment_seal":"a1b2c3d4e5f60708","verdict_seal":"1020304050607080"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_DRl7kNHz9Qq_jlWc5DH74","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Provides paid cryptographic notarization and session verification with audit trail via USDC micropayment on Base, no signup required.","exampleAgentPrompt":"Notarize this document hash 0xabc123... using KHOTEM — I want a cryptographic seal and audit record proving it existed right now, and pay the $0.05 USDC fee on Base.","exampleUseCases":[{"title":"Seal a contract before signing","prompt":"I need to notarize this contract hash 0xdeadbeef... before we countersign it — get me a tamper-proof KHOTEM seal and audit timestamp, paying the USDC fee on Base."},{"title":"Audit trail for AI agent session","prompt":"After this agent session completes, create a KHOTEM verification record and seal for the session ID sess_9921 so we have a cryptographic audit trail of everything that happened."},{"title":"Prove data integrity for compliance","prompt":"We need to certify that this data payload hash 0x99fa12... was unchanged as of today for our compliance report — use KHOTEM to notarize it and give me the seal receipt."}],"resultDescription":"Returns a cryptographic seal or notarization certificate with a timestamp, verification status, and audit record proving the submitted content or session existed and was valid at the time of the call. Typically includes a proof hash, seal identifier, and audit log reference.","failureModes":["Insufficient USDC payment — payment below $0.05 or on wrong chain returns payment required error","Invalid or malformed payload — missing required content hash or session data returns 400 bad request","Payment not confirmed on Base — pending transaction may cause verification to fail or time out","Duplicate submission — resubmitting same content within a short window may be rejected or treated as new record","Network congestion on Base — blockchain confirmation delays may cause slow response or timeout"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, permissionless cryptographic notarization or session verification without account creation or KYC. It is ideal for AI agents that need to seal documents, prove data integrity, or create audit trails on-demand with a $0.05 USDC micropayment on Base. Prefer it over traditional notary APIs when anonymity, no-signup access, and blockchain-backed proofs are required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:35:36.631Z","isFirstParty":false}