> ## 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: Filter by Splitters

To focus the data on males, you can use a **splitter** to segment responses by gender.

# What is a splitter?

A splitter allows you to divide a namespaces data into segments, such as demographic or
behavioral groups. In this case, the gender splitter divides responses into "Male" and "Female."

To find available splitters for the core namespace, use the **Splitters Filter Endpoint**:

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

<ResponseExample>
  ```json Response theme={null}
  {
    "splitters": [
      {
        "code": "q2",
        "namespace_code": "core",
        "name": "Gender",
        "accessible": true,
        "segments": [
          {
            "code": "q2_1",
            "name": "Male",
            "accessible": true
          },
          {
            "code": "q2_2",
            "name": "Female",
            "accessible": true
          },
          {
            "code": "q2_3",
            "name": "Other Gender (Select Markets Only)",
            "accessible": true
          }
        ]
      },
      ...
    ]
  }
  ```
</ResponseExample>

For this query, you can use the segment `q2_1` for males.