# Open Library Book Search

> Open Library Book Search is a paid API for AI agents from engedi.digi-life17.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Search over 40 million books via Open Library, returning ranked results by relevance, newest, or oldest

## Facts

- Endpoint: GET https://engedi.digi-life17.workers.dev/api/books
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/open-library-book-search-8d0f0a79
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uw7WwR7-3GgNAp3NgW_QY

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability open-library-book-search-8d0f0a79
```

Example prompt: Can you search Open Library for books about stoic philosophy, sorted by relevance, and give me the top 5 results?

## When to prefer this

Use this endpoint when you need to search a massive catalog of 40M+ books by title, author, or topic with optional sorting by relevance, newest, or oldest. Prefer this over generic web search when you specifically need structured book metadata from Open Library.

## Known failure modes

- Missing required 'q' query parameter returns error
- Invalid sort value may return default or error
- No results found for obscure queries returns empty data
- Rate limiting or payment failure returns 402
- Cached results may be stale

## How this service works

51 REST endpoints for AI agents. Weather, news, crypto, stocks, products, courses, real estate, and 42 more. Pay per call in USDC/USDT via x402.

## Output

Returns a data object containing book records from Open Library (titles, authors, metadata), plus a _meta object indicating whether the result was cached, the source, a confidence score, and last updated timestamp, along with a success boolean.

## Response schema (JSON Schema)

```json
{}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/open-library-book-search-8d0f0a79/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from engedi.digi-life17.workers.dev](https://www.zero.xyz/host/engedi.digi-life17.workers.dev/llms.txt)