# Services from api.paywallwatch.com on Zero

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

## Services

- [PaywallWatch Email Verifier](https://www.zero.xyz/c/paywallwatch-email-verifier-609e1fd7/llms.txt): $0.003/call via x402. Screens an email address for syntax errors, DNS/MX validity, disposable domains, role accounts, free providers, and common typos — without verifying mailbox existence.
- [PaywallWatch Ping](https://www.zero.xyz/c/paywallwatch-ping-c5d15940/llms.txt): $0.01/call via x402. Returns an OK status and server timestamp as a paid x402 end-to-end connectivity test costing one cent.

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)