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

# Get dimension values

> List what a dimension can be filtered to

API versions: v1 (current) https://docs.odysseysignal.com/api/reference/get-dimension-values.md

`GET /v1/signals/{signal_id}/datasources/{datasource_id}/datasets/{dataset_id}/dimensions/{dimension_id}/values`

Members under this Signal's entitlements. For most dimensions they are the values present in this DataSet; for a survey (perception) dimension they are the question's answer options — what it can be answered with, which may include a value no respondent picked.

Authentication: an API key in `X-Api-Key`, or `Authorization: Bearer <token>`.

## Parameters

### Path parameters

- `signal_id` (string, required)
- `datasource_id` (string, required)
- `dataset_id` (string, required)
- `dimension_id` (string, required)

## Example request

```bash
curl "https://api.odysseysignal.app/v1/signals/{signal_id}/datasources/{datasource_id}/datasets/{dataset_id}/dimensions/{dimension_id}/values" \
  -H "X-Api-Key: $ODYSSEY_API_KEY"
```

## Response 200

Content: `application/json`. The members a dimension can be filtered to, for one DataSource.

- `environment` (string, nullable): The data environment the answer was read in, `prod` or `test`: the one Odyssey set on the Signal, or the one an Odyssey person picked for this call.
- `dimension` (string, required)
- `source` (string, required): dataset — enumerated from the data actually in scope; static — a closed list the API defines.
- `count` (integer, required)
- `members` (array of objects, required)
  - `id` (string or integer, required)
  - `label` (string, required)
  - `group` (string, nullable)
  - `type` (string, nullable)
  - `description` (string, nullable)
  - `demand_space` (object, nullable): For an attribute: the demand space the survey assigns it to. Absent where there is none.
    - `id` (integer, required)
    - `label` (string, required)

## Errors

Errors are `application/problem+json` (RFC 9457): `type`, `title`, `status`, `detail` and, for some, more fields that say how to fix the call. The `type` is `https://api.odysseysignal.app/problems/<code>`.

| Status | Code | When |
|---|---|---|
| 400 | `invalid-request` | The request is not valid for this DataSet; `detail` says why. |
| 401 | `unauthorized` | No credential, or one that is not accepted. |
| 403 | `forbidden` | The credential is valid but does not cover what was asked. |
| 404 | `not-found` | Nothing there, or nothing this credential may read. |
| 422 | `validation-failed` | The request does not match the contract; `errors` lists each field. |
| 429 | `rate_limited` | Too many requests, or the monthly quota is used up. |
| 503 | `unavailable` | A service behind the API did not answer; try again. |