# Services from mail.halowerk.com on Zero

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

## Services

- [Agent Email Check – Batch Email Validation](https://www.zero.xyz/c/agent-email-check-batch-email-validation-622b89e7/llms.txt): $0.001/call via x402. Validates up to 100 email addresses per call using DNS and list-based checks, with optional SMTP probing, billed per address.
- [Agent Email Check (Single Address)](https://www.zero.xyz/c/agent-email-check-single-address-8bd14886/llms.txt): $0.001/call via x402. Verifies a single email address using DNS and blocklist checks, with an optional SMTP probe, returning a conservative verdict that distinguishes unknown-but-routable from confirmed-valid.

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)