We provide Codex CLI as a standalone, native executable to ensure a zero-dependency install.

Today, the easiest way to install Codex is via npm, though we plan to publish Codex to other package managers soon.

npm i -g @openai/codex@native
codex

You can also download a platform-specific release directly from our GitHub Releases.

Codex supports a rich set of configuration options. See config.md for details.

Codex CLI functions as an MCP client that can connect to MCP servers on startup. See the mcp_servers section in the configuration documentation for details.

It is still experimental, but you can also launch Codex as an MCP server by running codex mcp. Using the @modelcontextprotocol/inspector is

npx @modelcontextprotocol/inspector codex mcp

This folder is the root of a Cargo workspace. It contains quite a bit of experimental code, but here are the key crates:

• core/ contains the business logic for Codex. Ultimately, we hope this to be a library crate that is generally useful for building other Rust/native applications that use Codex.
• exec/ "headless" CLI for use in automation.
• tui/ CLI that launches a fullscreen TUI built with Ratatui.
• cli/ CLI multitool that provides the aforementioned CLIs via subcommands.