GET /ontologies
ac.uk:embl-ebi-ontology-lookup-service-ols-api
Summary: List all ontologies
Operation ID: getOntologies
Auth: unknown
Operation ID: getOntologies
Auth: unknown
Description
Returns a paginated list of all available ontologies in OLS
Parameters (3)
lang
(string, query, optional, default: en)
Language code
page
(integer, query, optional, default: 0)
Page number (0-indexed)
size
(integer, query, optional, default: 20)
Page size
Examples (4)
| Title | Type | URL | Action |
|---|---|---|---|
| List ontologies with default pagination | curl |
https://www.ebi.ac.uk/ols4/api/ontologies |
|
| List ontologies with custom page size | curl |
https://www.ebi.ac.uk/ols4/api/ontologies?page=0&size=10 |
|
| List ontologies on second page with larger size | curl |
https://www.ebi.ac.uk/ols4/api/ontologies?page=1&size=50 |
|
| List all ontologies | probe-gate |
https://www.ebi.ac.uk/ols4/api/ontologies?page=0&size=20 |
Probe History
Status Codes
| Time | Status | Latency | Size |
|---|---|---|---|
| 2026-03-23 10:47:12.434561 | 200 | 144ms | |
| 2026-03-23 10:32:25.334139 | 200 | 172ms | |
| 2026-03-23 10:23:39.626168 | 200 | 152ms | |
| 2026-03-23 09:20:35.215455 | 200 | 174ms |
Response Changes
| When | Old | New |
|---|---|---|
| 2026-03-23 10:23:39.626168 | 61095448d7a9 |
3eb0ef7a17bf |
| 2026-03-23 10:32:25.334139 | 3eb0ef7a17bf |
61095448d7a9 |
| 2026-03-23 10:47:12.434561 | 61095448d7a9 |
15c4227c7792 |