GET /collections/
loc.gov:library-of-congress-apis
Summary: List Collections
Operation ID: listCollections
Auth: none
Operation ID: listCollections
Auth: none
Description
Retrieve a list of thematic collections.
Parameters (1)
fo
(string, query, optional)
Output format
Constraints: {'enum': ['json', 'yaml']}
Examples (2)
| Title | Type | URL | Action |
|---|---|---|---|
| List digital collections | openapi-spec |
https://www.loc.gov/collections/?fo=json&c=25 |
|
| List Collections | openapi-spec |
https://www.loc.gov/collections/?fo=json |
Probe History
Status Codes
| Time | Status | Latency | Size |
|---|---|---|---|
| 2026-03-23 10:37:18.761921 | 200 | 104ms | 0.9MB |
| 2026-03-23 09:05:16.524413 | 200 | 668ms | 0.5MB |
Response Changes
| When | Old | New |
|---|---|---|
| 2026-03-23 10:37:18.761921 | e9e26791b0c9 |
1fee568666d5 |