# Services from b20check.com on Zero

> b20check.com serves 2 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/b20check.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/b20check.com/health.json

## Services

- [B20 Check Token Verification API](https://www.zero.xyz/c/b20-check-token-verification-api-71ada997/llms.txt): $0.01/call via x402. Returns a signed EIP-712 verdict on issuer powers (mint, freeze, seize, pause, admin) for any B20 token contract on Base
- [B20Check Token Legitimacy Verifier](https://www.zero.xyz/c/b20check-token-legitimacy-verifier-ac90028a/llms.txt): $0.01/call via x402. Verifies whether a Base blockchain address is a legitimate factory-native B20 token, detecting copycats, impersonators, and reporting live issuer risk powers with a signed EIP-712 verdict.

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)