GET /collections
loc.gov:library-of-congress-api
Summary: List all digital collections
Operation ID: listCollections
Auth: none
Operation ID: listCollections
Auth: none
Description
Get a list of all Library of Congress digital collections
Parameters (1)
fo
(string, query, required)
Output format - must be 'json' for JSON response
Constraints: {'enum': ['json']}
Examples (3)
| Title | Type | URL | Action |
|---|---|---|---|
| List all collections (JSON format) | curl |
https://www.loc.gov/api/collections?fo=json |
|
| List collections with result limit | curl |
https://www.loc.gov/api/collections?fo=json&c=10 |
|
| List collections with offset for pagination | curl |
https://www.loc.gov/api/collections?fo=json&c=20&sp=2 |
Probe History
Status Codes
| Time | Status | Latency | Size |
|---|---|---|---|
| 2026-03-23 10:51:20.969317 | 404 | 526ms | |
| 2026-03-23 10:08:41.174464 | 404 | 612ms | |
| 2026-03-23 09:43:14.153127 | 404 | 240ms |
Response Changes
| When | Old | New |
|---|---|---|
| 2026-03-23 10:08:41.174464 | b66a0ad84841 |
e41d8d0d8924 |
| 2026-03-23 10:51:20.969317 | e41d8d0d8924 |
1a76586d59be |