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

# Configuration guide

> Configure Claude Code to use DUIAPI

Manual configuration is useful when you want to edit Claude Code's configuration file directly. After configuration, Claude Code sends model requests through DUIAPI.

<Tabs>
  <Tab title="Windows">
    ## 1. Open the configuration directory

    Press **Win + R**, enter the following path, and press Enter:

    ```text theme={null}
    %userprofile%\.claude
    ```

    If `settings.json` does not exist, create it and open it.

    ## 2. Write settings.json

    <Tip>
      Replace `<API_KEY>` with your API key, such as `sk-xxxxxx`. Replace `<MODEL>` with the model you use, such as `qwen3.7-max`.
    </Tip>

    Write the following content to `settings.json`:

    ```json theme={null}
    {
      "env": {
        "ANTHROPIC_AUTH_TOKEN": "<API_KEY>",
        "ANTHROPIC_BASE_URL": "https://www.duiapi.com",
        "ANTHROPIC_DEFAULT_HAIKU_MODEL": "<MODEL>",
        "ANTHROPIC_DEFAULT_OPUS_MODEL": "<MODEL>",
        "ANTHROPIC_DEFAULT_SONNET_MODEL": "<MODEL>",
        "ANTHROPIC_MODEL": "<MODEL>",
        "CLAUDE_CODE_SUBAGENT_MODEL": "<MODEL>"
      },
      "includeCoAuthoredBy": false
    }
    ```

    ## 3. Test the configuration

    Save `settings.json`, then run:

    ```bash theme={null}
    claude
    ```

    Send a test message after the chat UI opens. If Claude Code replies, the configuration works.
  </Tab>

  <Tab title="macOS">
    ## 1. Open the configuration directory

    Run:

    ```bash theme={null}
    mkdir -p ~/.claude
    cd ~/.claude
    ```

    If `settings.json` does not exist, create it and open it:

    ```bash theme={null}
    touch settings.json
    open -a TextEdit settings.json
    ```

    ## 2. Write settings.json

    <Tip>
      Replace `<API_KEY>` with your API key, such as `sk-xxxxxx`. Replace `<MODEL>` with the model you use, such as `qwen3.7-max`.
    </Tip>

    Write the same `settings.json` content shown in the Windows tab.

    ## 3. Test the configuration

    Save `settings.json`, then run:

    ```bash theme={null}
    claude
    ```
  </Tab>

  <Tab title="Linux">
    ## 1. Open the configuration directory

    Run:

    ```bash theme={null}
    mkdir -p ~/.claude
    cd ~/.claude
    ```

    If `settings.json` does not exist, create it and open it:

    ```bash theme={null}
    touch settings.json
    nano settings.json
    ```

    ## 2. Write settings.json

    <Tip>
      Replace `<API_KEY>` with your API key, such as `sk-xxxxxx`. Replace `<MODEL>` with the model you use, such as `qwen3.7-max`.
    </Tip>

    Write the same `settings.json` content shown in the Windows tab.

    ## 3. Test the configuration

    Save `settings.json`, then run:

    ```bash theme={null}
    claude
    ```
  </Tab>
</Tabs>