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

# Step 4: Access Categories in the GWI Core namespace

The question is part of the **GWI Core** namespace under the **Social Media** category.
Use the `/v2/categories/filter` endpoint to retrieve all root categories within the `GWI Core` namespace.

<RequestExample>
  ```bash theme={null}
  curl -X POST "https://api.globalwebindex.com/v2/categories/filter" \
    -H "Content-Type: application/json" \
    -H "Authorization: Bearer YOUR_API_KEY" \
    -d '{ "dataset_codes": ["gwi-core"] }'
  ```
</RequestExample>

<ResponseExample>
  ```json Response theme={null}
  { 
      "categories": [
          {
              "id": "330",
              "name": "GWI Core", 
              "child_categories": [ 
                  { 
                      "id": "500", 
                      "name": "Social Media" 
                  }, 
                  ... 
              ] 
          } 
      ] 
  }
  ```
</ResponseExample>

From the response, note the `id` for the **Social Media** category: 500.