> ## Documentation Index
> Fetch the complete documentation index at: https://tbd-6fc993ce-hypeship-docs-ia-v2.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Codex

> Give OpenAI's Codex a KERNEL browser

<Note>
  This is a starter guide. A full walkthrough is coming.
</Note>

[Codex](https://developers.openai.com/codex) is OpenAI's coding agent. You can give it KERNEL know-how with the KERNEL plugin, and KERNEL browsers as tools with the KERNEL MCP server. Use either or both.

## Install the KERNEL plugin

The plugin adds [Agent Skills](/skills/overview) for the KERNEL CLI and SDKs, so Codex knows how to create and drive browsers.

```bash theme={null}
codex plugin marketplace add kernel/skills
codex plugin add kernel-cli@kernel
codex plugin add kernel-sdks@kernel
```

You can also find the KERNEL plugins under **Plugins** in the ChatGPT desktop app after adding the marketplace.

## Connect the MCP server

The [KERNEL MCP server](/reference/mcp-server) gives Codex tools to create browsers, run Playwright code, take screenshots, and more.

```bash theme={null}
codex mcp add kernel --url https://mcp.onkernel.com/mcp
codex mcp login kernel
```

`codex mcp login` opens your browser so you can authorize access to your KERNEL account. To use an API key instead, see [MCP authentication](/reference/mcp-server/authentication).

Start a Codex session and run `/mcp` to confirm the KERNEL tools are available.


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.