# Services from course-catalog-api.lewis-6d8.workers.dev on Zero

> course-catalog-api.lewis-6d8.workers.dev 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/course-catalog-api.lewis-6d8.workers.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/course-catalog-api.lewis-6d8.workers.dev/health.json

## Services

- [Course Catalog Prerequisite Graph API](https://www.zero.xyz/c/course-catalog-prerequisite-graph-api-56c51b55/llms.txt): $0.05/call via x402. Returns a prerequisite dependency graph for a specified university course, showing all courses required before enrollment.
- [Course Catalog API](https://www.zero.xyz/c/course-catalog-api-eb96310f/llms.txt): $0.05/call via x402. Returns university course listings and prerequisite graph data for a given institution, with optional filtering by term and subject.

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)