> ## Documentation Index
> Fetch the complete documentation index at: https://docs.omophub.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Get Vocabulary Release Version

> Return the upstream OHDSI vocabulary version label for a vocabulary release.

Returns the `vocabulary_version` recorded on the OMOP vocabulary row whose
`vocabulary_id` is `None`. This is the upstream Athena/OHDSI version label for
the selected dataset, not the OMOPHub release identifier such as `2026.2`.

Use [Get Vocabulary Releases](/api-reference/vocabularies/get-vocabulary-releases)
to list OMOPHub releases, their status, dates, and aggregate counts.

## Query Parameters

<ParamField query="vocab_release" type="string" optional>
  Vocabulary release to inspect. When omitted, the current default release is
  used.
</ParamField>

## Response

<ResponseField name="success" type="boolean">
  Whether the version lookup completed.
</ResponseField>

<ResponseField name="data" type="object">
  <Expandable title="Version object">
    <ResponseField name="version" type="string">
      Upstream OHDSI vocabulary version label stored in the selected release.
    </ResponseField>
  </Expandable>
</ResponseField>

<ResponseField name="meta" type="object">
  <Expandable title="Response metadata">
    <ResponseField name="request_id" type="string">
      Unique request identifier.
    </ResponseField>

    <ResponseField name="timestamp" type="string">
      ISO 8601 response timestamp.
    </ResponseField>

    <ResponseField name="vocab_release" type="string">
      OMOPHub vocabulary release used for the lookup.
    </ResponseField>
  </Expandable>
</ResponseField>

<RequestExample>
  ```bash cURL theme={null}
  curl -G "https://api.omophub.com/v1/vocabularies/release-version" \
    -H "Authorization: Bearer YOUR_API_KEY" \
    --data-urlencode "vocab_release=2026.2"
  ```
</RequestExample>

<ResponseExample>
  ```json Response theme={null}
  {
    "success": true,
    "data": {
      "version": "v5.0 29-AUG-26"
    },
    "meta": {
      "request_id": "5f994882-f2a9-4e19-b0a5-d2de2dad10b3",
      "timestamp": "2026-09-12T22:30:16.802Z",
      "vocab_release": "2026.2"
    }
  }
  ```
</ResponseExample>