# Services from khotem.com on Zero

> khotem.com serves 11 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/khotem.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/khotem.com/health.json

## Services

- [KHOTEM Seal — Content Notarization & Audit](https://www.zero.xyz/c/khotem-seal-content-notarization-audit-d5f2163b/llms.txt): $0.05/call via x402. Cryptographically seals and notarizes content or a pre-computed SHA-256 hash, creating a verifiable timestamped record for audit purposes, paid instantly via USDC on Base.
- [KHOTEM Open Stream Topup](https://www.zero.xyz/c/khotem-open-stream-topup-44473310/llms.txt): $0.5/call via x402. Tops up an existing KHOTEM cryptographic witness stream by adding 1000 more messages to its message quota
- [KHOTEM Attest — Notary & Session Verification](https://www.zero.xyz/c/khotem-attest-notary-session-verification-ce0f3137/llms.txt): $0.02/call via x402. Looks up and attests a transaction hash, SHA-256 digest, or timestamp stamp via a SEAL notary audit, paid with USDC on Base.
- [KHOTEM Asset Price Lookup](https://www.zero.xyz/c/khotem-asset-price-lookup-4e7342cb/llms.txt): $0.01/call via x402. Returns current prices for specified crypto assets (ETH, USDC, DAI, LINK, SOL) via a paid micropayment endpoint
- [KHOTEM Notary & Session Verification](https://www.zero.xyz/c/khotem-notary-session-verification-ac2444d9/llms.txt): $0.05/call via x402. Provides paid cryptographic notarization and session verification with audit trail via USDC micropayment on Base, no signup required.
- [KHOTEM Cryptographic Document Seal — Document #15](https://www.zero.xyz/c/khotem-cryptographic-document-seal-document-15-995c2950/llms.txt): $0.1/call via x402. Returns a cryptographically sealed document (doc #15) with a SHA hash and payment seal after USDC micropayment verification on Base
- [KHOTEM Notary Audit & Session Verification](https://www.zero.xyz/c/khotem-notary-audit-session-verification-2327688b/llms.txt): $0.15/call via x402. 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.
- [KHOTEM Cryptographic Document Seal — Paid Verification](https://www.zero.xyz/c/khotem-cryptographic-document-seal-paid-verification-2e424cc9/llms.txt): $0.1/call via x402. Fetches a cryptographically sealed document by ID, returning its content along with a payment-verified seal hash proving the document was retrieved and paid for.
- [KHOTEM Cryptographic Document Seal — Document #16](https://www.zero.xyz/c/khotem-cryptographic-document-seal-document-16-ce8f2f36/llms.txt): $0.1/call via x402. Returns cryptographically sealed document #16 with a SHA hash and payment seal after USDC payment on Base
- [KHOTEM Thread Document Retrieval with Cryptographic Seal](https://www.zero.xyz/c/khotem-thread-document-retrieval-with-cryptographic-seal-ef55f4c9/llms.txt): $0.25/call via x402. Returns a full verified document thread with a cryptographic payment seal after paying $0.25 USDC on Base
- [KHOTEM Quantum Circuit Simulator (qsim)](https://www.zero.xyz/c/khotem-quantum-circuit-simulator-qsim-60885e92/llms.txt): $0.1/call via x402. Simulates a quantum circuit defined by gates and qubits, returning measurement results, paid via x402 micropayment with no account or API key required.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)