# Services from list-smith-production.up.railway.app on Zero

> list-smith-production.up.railway.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/list-smith-production.up.railway.app
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/list-smith-production.up.railway.app/health.json

## Services

- [list-smith /v1/fix — x402 Route Discovery Repair](https://www.zero.xyz/c/list-smith-v1-fix-x402-route-discovery-repair-758b6187/llms.txt): $0.5/call via x402. Audits and fully repairs an x402 route's Bazaar discovery metadata, returning a validated discovery package (schema, description, OpenAPI snippet, instructions) inferred from a real sample output.
- [list-smith x402 Route Grader](https://www.zero.xyz/c/list-smith-x402-route-grader-12d7c01b/llms.txt): $0.1/call via x402. Probes and grades an x402 route's Bazaar discovery metadata, returning a 0-100 score with itemized defects and SDK validator verdicts.

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)