# Services from api.spendpreflight.com on Zero

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

## Services

- [SpendPreflight](https://www.zero.xyz/c/spendpreflight-3175847d/llms.txt): $0.02/call via x402. Pre-authorizes AI agent payments by evaluating x402 PaymentRequired responses or carts against configurable spending rules, returning an allow/hold/block decision with the cheapest acceptable payment option and a receipt ID.
- [SpendPreflight Risk Check](https://www.zero.xyz/c/spendpreflight-risk-check-d3a980f1/llms.txt): $0.01/call via x402. Screens a merchant, domain, or wallet address for sanctions matches and risk signals before authorizing an x402 payment

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)