Library of Congress

Search the Library of Congress collections (books, photos, maps, manuscripts, recordings) and get item metadata as JSON by adding fo=json to any loc.gov search.

BooksAuth: NoneHTTPS: YesCORS: yesStatus: alive

Last verified: November 12, 2026

Reliability

100% uptime: the documentation responded in 3 of 3 checks over the last 30 days. Median response time: 335 ms.

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At a glance

Authentication: None
HTTPS: Yes
CORS: Yes, callable from browser JavaScript
Documentation: https://www.loc.gov/apis/

// Fetch the docs page with cURL
curl https://www.loc.gov/apis/

History

November 12, 2026: last health check, responding
November 9, 2026: Added to the directory (government api, verified by api bouncer)

See every change to the directory →

Library of Congress

Reliability

At a glance

History

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