: Search maps

API: loc.gov:library-of-congress-api
Endpoint: /maps/
Response format: application/json
Auth: none
Method: GET
Last Status: 200
Latency: 1516ms

Description

Search and browse maps and cartographic materials from the Library of Congress collections.

Parameters (4)

c (integer, query, optional, default: 25)

Count/items per page

fo (string, query, optional, default: json)

Output format

Constraints: {'enum': ['json', 'yaml']}

q (string, query, optional)

Search term

sp (integer, query, optional)

Start page number

Examples (2)

Search maps and atlases openapi-spec
curl 'https://www.loc.gov/maps/?q=civil+war&fo=json'
import requests

resp = requests.get(
    "https://www.loc.gov/maps/",
    params={
        'q': 'civil war',
        'fo': 'json',
    },
)
data = resp.json()
import zingu_apis

api = zingu_apis.api("library-of-congress")
result = api.fetch("maps/", q="civil war", fo="json")

for item in result:
    print(item)
const resp = await fetch("https://www.loc.gov/maps/?q=civil+war&fo=json");
const data = await resp.json();
Search maps openapi-spec
curl 'https://www.loc.gov/maps/?q=virginia&fo=json'
import requests

resp = requests.get(
    "https://www.loc.gov/maps/",
    params={
        'q': 'virginia',
        'fo': 'json',
    },
)
data = resp.json()
import zingu_apis

api = zingu_apis.api("library-of-congress")
result = api.fetch("maps/", q="virginia", fo="json")

for item in result:
    print(item)
const resp = await fetch("https://www.loc.gov/maps/?q=virginia&fo=json");
const data = await resp.json();

Probe History

Latency

Status Codes

TimeStatusLatencySize
2026-04-16 03:28:15.185205 200 1516ms
2026-04-16 01:27:21.094853 200 1092ms
2026-04-15 03:50:55.477096 200 2101ms
2026-04-15 00:23:18.122760 200 1074ms
2026-04-14 01:08:09.701802 200 1046ms
2026-04-14 00:27:55.452619 200 1540ms
2026-04-12 15:23:59.752653 200 1690ms
2026-04-12 13:57:47.137973 ERR
2026-04-10 02:45:55.553287 200 4943ms
2026-04-10 01:13:06.602852 200 1410ms
2026-04-09 02:19:25.153313 200 1949ms
2026-04-09 01:08:42.246929 200 907ms
2026-04-08 06:54:59.900886 200 1650ms
2026-04-08 00:26:14.739079 200 988ms
2026-04-07 01:29:37.873765 200 1267ms
2026-04-07 00:57:27.548550 200 1161ms
2026-04-06 06:44:16.932977 200 1076ms
2026-04-06 00:11:29.663563 200 182ms
2026-04-05 03:51:05.631347 200 1087ms
2026-04-05 01:15:00.310033 200 1479ms
2026-04-04 03:24:26.472741 200 912ms
2026-04-04 03:23:24.231324 200 1160ms
2026-04-03 13:05:38.330914 200 944ms
2026-04-03 12:55:30.892265 200 1218ms
2026-03-30 02:54:58.444544 200 1138ms
2026-03-30 02:33:35.513003 200 1364ms
2026-03-29 13:29:12.300808 200 1217ms
2026-03-29 13:20:45.260943 200 1076ms
2026-03-23 09:13:36.455151 200 1313ms
2026-03-23 09:06:49.833271 200 727ms