# Services from presign-guard.fizzl.eu on Zero

> presign-guard.fizzl.eu serves 4 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/presign-guard.fizzl.eu
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/presign-guard.fizzl.eu/health.json

## Services

- [presign-guard /v1/check](https://www.zero.xyz/c/presign-guard-v1-check-3b86cebe/llms.txt): $0.01/call via x402. Returns a green/orange/red safety verdict with reason codes for EVM transactions, token approvals, and typed-data signatures before they are signed
- [presign-guard Token Safety Checker](https://www.zero.xyz/c/presign-guard-token-safety-checker-5f247f29/llms.txt): $0.01/call via x402. Analyzes a Solana or EVM token for honeypot, rug pull, and other risk signals, returning a SAFE/CAUTION/RISKY/AVOID grade with reasons and market data
- [presign-guard ERC-20 Approval Auditor](https://www.zero.xyz/c/presign-guard-erc-20-approval-auditor-da143827/llms.txt): $0.02/call via x402. Audits all open ERC-20 token allowances for an EVM wallet, grading each approval and identifying risky, unlimited, or flagged spenders to revoke
- [presign-guard explain](https://www.zero.xyz/c/presign-guard-explain-76a59c6b/llms.txt): $0.03/call via x402. Returns a green/orange/red risk verdict plus a plain-language explanation (in English or Dutch) for a transaction, token approval, or typed-data signature before an AI agent or wallet signs it.

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)