# Services from book402.com on Zero

> book402.com 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/book402.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/book402.com/health.json

## Services

- [Book402 Hybrid Book Search](https://www.zero.xyz/c/book402-hybrid-book-search-79ae16f3/llms.txt): $0.01/call via x402. Performs hybrid BM25+vector search across 3,807 books, returning ranked results with titles, authors, genres, and relevance scores
- [Book402 Summary Search](https://www.zero.xyz/c/book402-summary-search-31d28541/llms.txt): $0.01/call via x402. Full-text search within book summaries and transcriptions to find specific concepts, ideas, or passages across a curated book library

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)