# Services from x402.nsgoods.org on Zero

> x402.nsgoods.org serves 3 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/x402.nsgoods.org
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402.nsgoods.org/health.json

## Services

- [x402.nsgoods.org Preflight Check](https://www.zero.xyz/c/x402-nsgoods-org-preflight-check-e705745c/llms.txt): $0.015/call via x402. Returns a signed composite preflight result combining payability, sanctions screening, and trust scoring for a given blockchain address in a specified role
- [x402.nsgoods.org Solana Settlement Verifier](https://www.zero.xyz/c/x402-nsgoods-org-solana-settlement-verifier-504c7501/llms.txt): $0.01/call via x402. Verifies whether a Solana transaction credited a specified amount of a given SPL token mint to a designated payee address
- [x402.nsgoods.org Watchdog Paid Registration](https://www.zero.xyz/c/x402-nsgoods-org-watchdog-paid-registration-b37fa748/llms.txt): $5/call via x402. Registers a paid 30-day signed monitoring subscription for a single x402 HTTP endpoint, delivering alerts to an email or webhook channel

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)