# Services from build.x420.dev on Zero

> build.x420.dev 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/build.x420.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/build.x420.dev/health.json

## Services

- [BUILD Token Purchase - $5 USDC (x420.dev)](https://www.zero.xyz/c/build-token-purchase-5-usdc-x420-dev-1b4bd15b/llms.txt): $5/call via x402. Purchases $5 USDC worth of BUILD tokens (0xa8b9cc8f89C1dAb497fEA439848c020F64DB1b07) on-chain and returns transaction details
- [BUILD Token Purchase (1 USDC) - x420.dev](https://www.zero.xyz/c/build-token-purchase-1-usdc-x420-dev-7f6a13b0/llms.txt): $1/call via x402. Purchases 1 USDC worth of BUILD tokens (contract 0xa8b9cc8f89C1dAb497fEA439848c020F64DB1b07) and delivers them to the caller

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)