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

# OpenAI Codex CLI

> Use MaxAPI in Codex CLI through a custom model provider.

[Codex CLI](https://github.com/openai/codex) supports custom providers through `config.toml`.

<Steps>
  <Step title="Install">
    ```bash theme={null}
    npm install -g @openai/codex
    export MAXAPI_API_KEY="YOUR_API_KEY"
    mkdir -p ~/.codex
    ```
  </Step>

  <Step title="Configure the provider">
    ```toml theme={null}
    model = "YOUR_MODEL_ID"
    model_provider = "maxapi"
    disable_response_storage = true

    [model_providers.maxapi]
    name = "MaxAPI"
    base_url = "https://api.maxapi.ai/v1"
    env_key = "MAXAPI_API_KEY"
    wire_api = "responses"
    ```
  </Step>

  <Step title="Start">
    ```bash theme={null}
    codex
    ```
  </Step>
</Steps>

<Warning>
  Store API keys only on trusted devices. Never commit a real key to Git or share it with others.
</Warning>

<Note>Codex CLI requires the Responses protocol. Select a model and route that support `/v1/responses`.</Note>