# Services from proofaudit.ai on Zero

> proofaudit.ai serves 6 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/proofaudit.ai
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/proofaudit.ai/health.json

## Services

- [ProofAudit.ai Chain-of-Custody Verification](https://www.zero.xyz/c/proofaudit-ai-chain-of-custody-verification-9c1ac86c/llms.txt): $0.025/call via x402. Retrieves a sealed, verifiable chain-of-custody audit record with cryptographic proof hash for compliance and financial operations.
- [ProofAudit.ai Audit Pack Export](https://www.zero.xyz/c/proofaudit-ai-audit-pack-export-9457333b/llms.txt): $0.025/call via x402. Exports a sealed, audit-ready evidence pack containing cryptographic proof, verification status, and compliance receipts for financial operations and credit approvals.
- [ProofAudit.ai Audit Evidence Verification](https://www.zero.xyz/c/proofaudit-ai-audit-evidence-verification-a8bd5699/llms.txt): $0.025/call via x402. Captures, verifies, and returns audit-ready evidence packs with sealed SHA-256 proof hashes for credit, compliance, and financial operations.
- [ProofAudit.ai Receipt Verification](https://www.zero.xyz/c/proofaudit-ai-receipt-verification-14e55691/llms.txt): $0.025/call via x402. Verifies and returns a sealed, audit-ready receipt for a prior transaction or approval, including a SHA-256 proof hash and on-chain token reference.
- [ProofAudit.ai Segregation Check](https://www.zero.xyz/c/proofaudit-ai-segregation-check-08e08e3d/llms.txt): $0.025/call via x402. Performs a segregation-of-duties verification check and returns a sealed, audit-ready proof record with a SHA-256 hash and on-chain token reference.
- [ProofAudit.ai Canonical Hash Verification](https://www.zero.xyz/c/proofaudit-ai-canonical-hash-verification-e1b1bcb7/llms.txt): $0.025/call via x402. Returns a sealed SHA-256 canonical hash and protocol token for ProofAudit.ai, verifying the service identity on the Base network for audit chain-of-custody purposes.

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)