# Wikipedia, Books & Web Archives API

4 implementations from Wikipedia, Internet Archive and Open Library, with no charge per call.

## Implementations

- [Book search](/providers/open-library/search.md): `open-library/search`, no charge per call. Search books by title, author or keyword in Open Library (Internet Archive): work key, title, authors, first publication year, edition count, languages, cover. Needs q. Served by Open Library.
- [Wayback Machine snapshot lookup](/providers/wayback/availability.md): `wayback/availability`, no charge per call. Check whether a URL is archived in the Internet Archive Wayback Machine and get the closest snapshot URL and timestamp (optionally closest to a given date). Needs url.
- [Wikipedia page summary](/providers/wikipedia/page-summary.md): `wikipedia/page-summary`, no charge per call. Short summary, description and thumbnail of an English Wikipedia article by title. Needs title.
- [Wikipedia search](/providers/wikipedia/search.md): `wikipedia/search`, no charge per call. Full-text search over English Wikipedia article titles and content. Needs query.

## Other capabilities

- [Scientific papers](/tools/knowledge/papers.md): 2 tools, with no charge per call.

## Providers

- [Wikipedia](/providers/wikipedia.md): 2 tools, with no charge per call.
- [Internet Archive](/providers/wayback.md): 1 tool, with no charge per call.
- [Open Library](/providers/open-library.md): 1 tool, with no charge per call.

## Questions

### Which tool should my agent use?

Your agent compares the 4 implementations by price and inputs with inspect_tool and proposes one before it runs.

### How is it billed?

These tools have no charge per call. A workspace is still needed so your agent can run them.

[Knowledge & research](/tools/knowledge.md) · [Connection guide](/connect.md) · [Billing](/docs/billing.md)

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[HTML page](/tools/knowledge/reference) · [Agent index](/llms.txt)