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Library of Congress JSON API

Library of Congress

Up· checked 14 Nov 2026, 01:55 UTCNo keyBooks & media

Add fo=json to most loc.gov pages; photos, maps, newspapers, manuscripts.

Homepage API documentation

Details

Access
No keyOpen access: no account or key needed.
Coverage
us
Updates
daily
Formats
JSONYAML
License
Public domain (US gov)
API base
https://www.loc.gov/
Tags
library, prints, maps, photographs
Added
14 Nov 2026

Status checks

Up Last check 14 Nov 2026, 01:55 UTC, HTTP 200, 125 ms.

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Library of Congress JSON API: public data source · Open Data Finder