> ## Documentation Index
> Fetch the complete documentation index at: https://docs.correl8.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Get active studies

> Custom REST integration for loading active research studies

```
GET /v1/project/{project_id}/research/studies/
```

Same JSON as the MCP tool **`get_active_studies`**. Use this when your integration cannot call MCP tools.

For the full schema, see **Get active studies** in the [API reference](/api-reference/introduction).

## Request

```bash theme={null}
curl "https://api.correl8.ai/v1/project/{project_id}/research/studies/?user_id=user-42" \
  -H "Authorization: ApiKey c8.xxx"
```

**`user_id`** is required.

## Response

Returns `200` with JSON:

```json theme={null}
{
  "user_id": "user-42",
  "studies": [
    {
      "question": "What do users struggle with?",
      "eligibility_criteria": "All users",
      "answer": null
    }
  ]
}
```

| Field                            | Description                                                                                                                                                                |
| -------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `user_id`                        | Same value as the `user_id` query parameter                                                                                                                                |
| `studies`                        | Active studies sampled in for this user (`[]` when none) — sampling, duration, and answer caps are checked server-side                                                     |
| `studies[].question`             | What the study wants to learn                                                                                                                                              |
| `studies[].eligibility_criteria` | When the agent should pursue this study. **Not checked server-side** — your integration must evaluate this against the current user/conversation before pursuing the study |
| `studies[].answer`               | The answer already logged for this user, or `null` if none yet                                                                                                             |

This REST response does not include each study's UUID. Get the study UUID from the Correl8 app to call [**Post a research study answer**](/essentials/research-answer-ingestion) over REST, or use the MCP tools (`get_active_studies` + `post_research_answer`), which use a 0-based **`study_index`** instead.