# Services from postagent-api.interpretai.tech on Zero

> postagent-api.interpretai.tech 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/postagent-api.interpretai.tech
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/postagent-api.interpretai.tech/health.json

## Services

- [PostAgent Physical Mail API – Print & Mail Letter via USPS](https://www.zero.xyz/c/postagent-physical-mail-api-print-mail-letter-via-usps-a6355ee7/llms.txt): $1.24/call via x402. Prints and mails a physical US letter (PDF, HTML, Markdown, DOCX, or image) via USPS, paid in USDC using the x402 payment protocol
- [PostAgent Address Verification API](https://www.zero.xyz/c/postagent-address-verification-api-00f42b06/llms.txt): $0.02/call via x402. Verifies a postal address for deliverability using CASS standardization (US) or international validation, paid per-call in USDC via x402

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)