terms: Search across all ontologies

API: ac.uk:embl-ebi-ontology-lookup-service-ols-api
Endpoint: /terms
Response format: application/json
Auth: none
Method: GET
Last Status: 200
Latency: 6548ms

Description

Returns a paginated list of terms from all ontologies. Use the search endpoint for more targeted queries.

Parameters (2)

page (integer, query, optional, default: 0)

Page number (0-indexed)

size (integer, query, optional, default: 20)

Page size (number of results per page)

Examples (3)

List first page of terms (default) curl
curl 'https://www.ebi.ac.uk/ols4/api/terms'
import requests

resp = requests.get("https://www.ebi.ac.uk/ols4/api/terms")
data = resp.json()
import zingu_apis

api = zingu_apis.api("embl-ebi-ontology-lookup-service-ols")
result = api.fetch("terms")

for item in result:
    print(item)
const resp = await fetch("https://www.ebi.ac.uk/ols4/api/terms");
const data = await resp.json();
List second page with default size curl
curl 'https://www.ebi.ac.uk/ols4/api/terms?page=1'
import requests

resp = requests.get(
    "https://www.ebi.ac.uk/ols4/api/terms",
    params={
        'page': '1',
    },
)
data = resp.json()
import zingu_apis

api = zingu_apis.api("embl-ebi-ontology-lookup-service-ols")
result = api.fetch("terms", page=1)

for item in result:
    print(item)
const resp = await fetch("https://www.ebi.ac.uk/ols4/api/terms?page=1");
const data = await resp.json();
List page 3 with 50 items per page curl
curl 'https://www.ebi.ac.uk/ols4/api/terms?page=2&size=50'
import requests

resp = requests.get(
    "https://www.ebi.ac.uk/ols4/api/terms",
    params={
        'page': '2',
        'size': '50',
    },
)
data = resp.json()
import zingu_apis

api = zingu_apis.api("embl-ebi-ontology-lookup-service-ols")
result = api.fetch("terms", page=2, size=50)

for item in result:
    print(item)
const resp = await fetch("https://www.ebi.ac.uk/ols4/api/terms?page=2&size=50");
const data = await resp.json();

Probe History

Latency

Status Codes

TimeStatusLatencySize
2026-04-16 17:06:57.628692 200 6548ms 2.0MB
2026-04-16 03:13:49.268357 200 399ms
2026-04-16 01:40:51.448109 200 693ms 2.0MB
2026-04-16 01:29:58.183928 200 1051ms 2.0MB
2026-04-15 04:05:48.714058 200 717ms 2.0MB
2026-04-15 03:46:17.439415 200 413ms
2026-04-15 00:08:16.881646 200 875ms 2.0MB
2026-04-14 02:46:26.841610 200 611ms
2026-04-14 00:24:33.845521 200 884ms 2.0MB
2026-04-14 00:01:35.227093 200 1072ms 2.0MB
2026-04-12 14:59:38.188494 200 893ms 2.0MB
2026-04-12 13:42:01.848063 200 1165ms 2.0MB
2026-04-12 13:24:16.151340 200 652ms
2026-04-10 02:15:57.075079 200 1163ms 2.0MB
2026-04-10 02:09:06.467135 200 610ms 2.0MB
2026-04-10 01:45:37.359311 200 668ms
2026-04-09 03:32:26.369375 200 820ms 2.0MB
2026-04-09 01:42:27.640809 200 926ms 2.0MB
2026-04-09 00:23:08.776392 200 581ms
2026-04-08 07:22:12.402151 200 782ms
2026-04-08 01:17:02.389985 200 1033ms 2.0MB
2026-04-08 00:05:12.335207 200 693ms 2.0MB
2026-04-07 00:54:28.853393 200 753ms 2.0MB
2026-04-07 00:37:06.153267 200 1016ms 2.0MB
2026-04-07 00:19:07.803497 200 582ms
2026-04-06 06:40:57.517021 200 537ms
2026-04-05 21:05:12.117567 200 788ms 2.0MB
2026-04-05 19:25:45.145294 200 1048ms 2.0MB
2026-04-05 14:25:24.195185 200 602ms
2026-03-23 10:50:55.149676 200 1153ms 2.0MB
2026-03-23 10:24:41.930811 200 475ms
2026-03-23 09:02:36.280094 200 964ms 2.0MB