---
title: Codex CLI
description: Use the official @openai/codex npm package to call OpenAI/Codex-like models in OpenSandbox.
---

# Codex/OpenAI CLI Example

Use the official `@openai/codex` npm package to call OpenAI/Codex-like models in OpenSandbox.

## Start OpenSandbox server [local]

Pre-pull the code-interpreter image (includes Node.js):

```shell
docker pull sandbox-registry.cn-zhangjiakou.cr.aliyuncs.com/opensandbox/code-interpreter:v1.1.0

# use docker hub
# docker pull opensandbox/code-interpreter:v1.1.0
```

Start the local OpenSandbox server, logs will be visible in the terminal:

```shell
uv pip install opensandbox-server
opensandbox-server init-config ~/.sandbox.toml --example docker
opensandbox-server
```

## Create and Access the Codex Sandbox

```shell
# Install OpenSandbox package
uv pip install opensandbox

# Run the example (requires SANDBOX_DOMAIN / SANDBOX_API_KEY / OPENAI_API_KEY)
uv run python examples/codex-cli/main.py
```

The script installs the Codex CLI (`npm install -g @openai/codex@latest`) at runtime (Node.js is already in the code-interpreter image), then executes a simple request `codex exec "Compute 1+1 and return JSON with keys result and reasoning." --skip-git-repo-check`. Auth is passed via `OPENAI_API_KEY`; you can override endpoint/model with `OPENAI_BASE_URL` / `OPENAI_MODEL`.

## Environment Variables

| Variable | Default | Description |
|----------|---------|-------------|
| `SANDBOX_DOMAIN` | `localhost:8080` | Sandbox service address |
| `SANDBOX_API_KEY` | _(optional for local)_ | API key if your server requires authentication |
| `SANDBOX_IMAGE` | `sandbox-registry.cn-zhangjiakou.cr.aliyuncs.com/opensandbox/code-interpreter:v1.1.0` | Sandbox image to use |
| `OPENAI_API_KEY` | _(required)_ | Your OpenAI API key |
| `OPENAI_BASE_URL` | `https://api.openai.com/v1` | OpenAI API endpoint |
| `OPENAI_MODEL` | `gpt-4o-mini` | Model to use |

## References

- [@openai/codex](https://www.npmjs.com/package/@openai/codex) - Official OpenAI Codex CLI
- [Source code on GitHub](https://github.com/opensandbox-group/OpenSandbox/tree/main/examples/codex-cli)