# Services from x402-resource-scanner.vercel.app on Zero

> x402-resource-scanner.vercel.app 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/x402-resource-scanner.vercel.app
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-resource-scanner.vercel.app/health.json

## Services

- [GateCheck by LarryBuildsAI – x402 Agent Tool Preflight Scanner](https://www.zero.xyz/c/gatecheck-by-larrybuildsai-x402-agent-tool-preflight-scanner-21d28dbb/llms.txt): $0.25/call via x402. Performs preflight readiness checks on a URL to verify it is properly configured as a paid x402 agent tool before marketplace listing, including seller-readiness, unpaid path probes, and launch-pack artifact validation.
- [GateCheck by LarryBuildsAI – x402 Preflight Receipt Check](https://www.zero.xyz/c/gatecheck-by-larrybuildsai-x402-preflight-receipt-check-538fd132/llms.txt): $0.05/call via x402. Runs preflight seller-readiness checks and unpaid x402 paid-path probes on an agent tool before marketplace listing, returning a structured receipt of gate results.

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)