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KHOTEM Notary Audit & Session Verification
x402
KHOTEM Notary Audit & Session Verification is a paid API for AI agents from khotem.com, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-13).
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.
Price / call$0.15
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Tamper-proof contract timestamp
“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.”
Session integrity verification
“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.”
Compliance audit trail entry
“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.”
Technical details
Endpoint
POSThttps://khotem.com/api/auditWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Tags
x402
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