# Services from x402-doctor.onrender.com on Zero

> x402-doctor.onrender.com 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-doctor.onrender.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-doctor.onrender.com/health.json

## Services

- [x402 Doctor – Endpoint Diagnostics](https://www.zero.xyz/c/x402-doctor-endpoint-diagnostics-75be1301/llms.txt): $0.01/call via x402. Diagnoses an x402 payment-gated endpoint by running a full suite of checks covering challenge format, accepted payment methods, resource URL, Solana settlement readiness, Bazaar/OpenAPI discoverability, and browser paywall behavior, returning each check's pass/warn/fail status with a fix hint.
- [x402 Doctor Preflight Check](https://www.zero.xyz/c/x402-doctor-preflight-check-ed08610b/llms.txt): $0.001/call via x402. Validates an x402 payment endpoint before paying it, returning a go/caution/no_go verdict with the recommended payment option and detailed reasons
- [x402 Doctor – Fix Endpoint](https://www.zero.xyz/c/x402-doctor-fix-endpoint-a2420c9b/llms.txt): $0.05/call via x402. Diagnoses an x402-protected HTTP endpoint and returns concrete, stack-specific code fixes for every detected problem, pre-filled with the caller's own payTo, amount, network, and route.

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)