children: Get term children

API: ac.uk:embl-ebi-ontology-lookup-service-ols-api
Endpoint: /ontologies/{ontologyId}/terms/{termId}/children
Response format: application/json
Auth: none
Method: GET
Last Status: 200
Latency: 234ms

Description

Returns direct children (subclasses) of the specified term

Parameters (5)

lang (string, query, optional, default: en)

Language code

ontologyId (string, path, required)

Ontology ID (e.g., 'go', 'efo', 'mondo')

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

Page number (0-indexed)

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

Page size

termId (string, path, required)

Term IRI (URL-encoded, typically double-encoded)

Examples (1)

Get children of independent continuant probe-gate
curl 'https://www.ebi.ac.uk/ols4/api/ontologies/go/terms/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FBFO_0000004/children'
import requests

resp = requests.get("https://www.ebi.ac.uk/ols4/api/ontologies/go/terms/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FBFO_0000004/children")
data = resp.json()
import zingu_apis

api = zingu_apis.api("embl-ebi-ontology-lookup-service-ols")
result = api.fetch("ontologies/{ontologyId}/terms/{termId}/children")

for item in result:
    print(item)
const resp = await fetch("https://www.ebi.ac.uk/ols4/api/ontologies/go/terms/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FBFO_0000004/children");
const data = await resp.json();

Probe History

Latency

Status Codes

TimeStatusLatencySize
2026-04-16 03:20:11.650348 200 234ms
2026-04-15 00:11:47.582549 200 271ms
2026-04-14 00:07:56.700677 200 281ms
2026-04-12 16:54:13.087089 200 247ms
2026-04-10 06:41:29.908650 200 163ms
2026-04-09 02:19:57.392280 200 214ms
2026-04-08 00:54:59.341733 200 598ms
2026-04-07 01:24:18.746308 200 231ms
2026-04-05 19:13:00.473720 200 1228ms