> For the complete documentation index, see [llms.txt](https://docs.ionos.com/cloud/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ionos.com/cloud/api-reference/databases/postgresql/clusters-1/supported-postgresql-versions-of-cluster.md).

# Supported PostgreSQL versions of cluster

Retrieves a list of all PostgreSQL versions available for this cluster.

```json
{"openapi":"3.0.3","info":{"title":"IONOS DBaaS PostgreSQL REST API","version":"1.0.0"},"tags":[{"name":"Clusters","description":"Everything about PostgreSQL clusters."}],"servers":[{"url":"https://api.ionos.com/databases/postgresql","description":"Production"}],"security":[{"basicAuth":[]},{"tokenAuth":[]}],"components":{"securitySchemes":{"basicAuth":{"type":"http","scheme":"basic","description":"You will need to base64 encode the string containing your credentials.\nSeparate your username and password with a colon, i.e.,\nusername:password and send it as 'Authorization' request header. More\ndetails: https://en.wikipedia.org/wiki/Basic_access_authentication.\n"},"tokenAuth":{"type":"apiKey","in":"header","name":"Authorization","description":"Please provide header value as 'Bearer <token>' and don't forget to add\n'Bearer' HTTP Authorization Scheme before the token.\n"}},"parameters":{"ClusterIdPath":{"name":"clusterId","in":"path","description":"The unique ID of the cluster.","required":true,"schema":{"type":"string"}}},"schemas":{"PostgresVersionList":{"description":"List of PostgreSQL versions.","properties":{"data":{"type":"array","items":{"properties":{"name":{"type":"string"}},"type":"object"}}},"type":"object"},"ErrorResponse":{"properties":{"httpStatus":{"type":"integer","description":"The HTTP status code of the operation."},"messages":{"type":"array","items":{"$ref":"#/components/schemas/ErrorMessage"}}},"type":"object"},"ErrorMessage":{"properties":{"errorCode":{"type":"string","description":"Application internal error code\n"},"message":{"type":"string","description":"A human readable explanation specific to this occurrence of the\nproblem.\n"}},"type":"object"}},"responses":{"ApiError":{"description":"Any erroneous status code: 400 (parse error), 401 (auth error),\n402 (trial access), 403 (insufficient permissions), 404 (not found),\n405 (unsupported HTTP method), 415 (unsupported content type,\n422 (validation error), 429 (request rate limit exceeded),\n500 (server error), 503 (maintenance)\n","headers":{"Content-Type":{"description":"application/problem+json","schema":{"type":"string","default":"application/problem+json"}}},"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}}}},"paths":{"/clusters/{clusterId}/versions":{"get":{"operationId":"clustersVersionsGet","summary":"Supported PostgreSQL versions of cluster","description":"Retrieves a list of all PostgreSQL versions available for this cluster.","tags":["Clusters"],"parameters":[{"$ref":"#/components/parameters/ClusterIdPath"}],"responses":{"200":{"description":"Successful operation.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/PostgresVersionList"}}}},"default":{"$ref":"#/components/responses/ApiError"}}}}}}
```


---

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