# Codex

> Add rho to OpenAI's Codex.

```bash
codex mcp add rho --url https://api.rho.store/mcp
codex mcp login rho
```

The login opens rho in your browser: sign in, choose **Read and write** or **Read only**, and allow it.

`codex mcp add` writes rho into `~/.codex/config.toml`. You can write it there yourself instead:

```toml
[mcp_servers.rho]
url = "https://api.rho.store/mcp"
```

In a Codex session, `/mcp` lists the servers it has.