# Services from x402-doctor.fizzl.eu on Zero

> x402-doctor.fizzl.eu serves 5 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.fizzl.eu
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-doctor.fizzl.eu/health.json

## Services

- [x402 Doctor Preflight Check](https://www.zero.xyz/c/x402-doctor-preflight-check-92fc6dd5/llms.txt): $0.001/call via x402. Pre-flight safety check for an x402 payment endpoint — returns go/caution/no_go verdict, recommended payment option, and reasons before your agent pays anything
- [x402 Doctor – Deep Preflight Check](https://www.zero.xyz/c/x402-doctor-deep-preflight-check-e391023d/llms.txt): $0.01/call via x402. Performs a comprehensive pre-payment analysis of an x402 endpoint, returning a pay/no-pay verdict, 30-day reliability history, seller reputation across endpoints, domain stability checks, and full diagnostics — without ever paying the endpoint.
- [x402 Doctor – Diagnose x402 Payment Endpoint](https://www.zero.xyz/c/x402-doctor-diagnose-x402-payment-endpoint-ec454433/llms.txt): $0.01/call via x402. Diagnoses and debugs an x402 payment endpoint by running a suite of read-only checks across the 402 challenge, accepts configuration, resource URL, Solana settlement readiness, wallet/agent compatibility, and discovery/browser paywall setup, returning each check with a status and fix hint.
- [x402 Doctor - Fix Broken x402 Endpoint](https://www.zero.xyz/c/x402-doctor-fix-broken-x402-endpoint-3ff6827d/llms.txt): $0.05/call via x402. Diagnoses a broken x402 payment endpoint and returns concrete, stack-specific code fixes (Express, Next.js, Hono, or raw HTTP) with your own payTo, amount, network, and route filled in.
- [x402 Doctor – Batch Preflight Safety Check](https://www.zero.xyz/c/x402-doctor-batch-preflight-safety-check-14d4e8a6/llms.txt): $0.005/call via x402. Checks up to 10 x402 payment endpoints in a single call and returns a go/caution/no_go safety verdict, recommended payment option, and batch totals for each

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)