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KHOTEM Cryptographic Document Seal — Document #16
x402
KHOTEM Cryptographic Document Seal — Document #16 is a paid API for AI agents from khotem.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).
Returns cryptographically sealed document #16 with a SHA hash and payment seal after USDC payment on Base
Price / call$0.1
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 JSON object containing the document ID (16), a SHA-16 hash of the document content, the full document content in markdown format, and a payment_seal value that cryptographically proves the document was paid for and retrieved at a specific point in time.
Example use cases
Retrieve sealed legal document
“Pull KHOTEM document 16 for me — pay the USDC fee and get me the sealed version with the cryptographic hash so I can prove it hasn't been tampered with.”
Anonymous notarization without signup
“I need a cryptographically witnessed copy of document 16 from KHOTEM — no account, just pay the 0.1 USDC on Base and hand me back the payment seal and SHA hash.”
Audit trail for compliance
“Fetch document 16 from KHOTEM with its payment seal and SHA-16 hash so I can attach it as a tamper-evident record in our compliance audit log.”
Technical details
Endpoint
POSThttps://khotem.com/api/doc/16When to prefer
Choose this endpoint when you need a cryptographically verifiable, payment-attested copy of document #16 from KHOTEM without requiring user registration or KYC. Ideal when tamper-evidence and a blockchain-anchored payment seal are required as proof of document integrity at a specific moment.
Side effects
- Payment not confirmed on Base — returns 402 if USDC payment was not received
- Invalid or duplicate payment — seal may not be issued
- Network latency on Base chain causing payment confirmation delay
- Document not found if doc ID is invalid
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Tags
x402
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