# Services from pay.vauban.tech on Zero

> pay.vauban.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/pay.vauban.tech
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/pay.vauban.tech/health.json

## Services

- [Vauban Pay – x402 API Payment (Base Mainnet)](https://www.zero.xyz/c/vauban-pay-x402-api-payment-base-mainnet-4f006580/llms.txt): $0.01/call via x402. Returns a payment quote for a per-call API fee denominated in USDC on Base mainnet, anchoring every transaction as a public record on Starknet.
- [Vauban Pay Monthly Observations (Base Mainnet)](https://www.zero.xyz/c/vauban-pay-monthly-observations-base-mainnet-09173661/llms.txt): $0.05/call via x402. Returns monthly observations data via a paid HTTP GET endpoint on Base mainnet, charging $0.05 USDC per call using the x402 payment protocol.

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)