1d17ca1fa3
This PR adds oauth login support to streamable http servers when `experimental_use_rmcp_client` is enabled. This PR is large but represents the minimal amount of work required for this to work. To keep this PR smaller, login can only be done with `codex mcp login` and `codex mcp logout` but it doesn't appear in `/mcp` or `codex mcp list` yet. Fingers crossed that this is the last large MCP PR and that subsequent PRs can be smaller. Under the hood, credentials are stored using platform credential managers using the [keyring crate](https://crates.io/crates/keyring). When the keyring isn't available, it falls back to storing credentials in `CODEX_HOME/.credentials.json` which is consistent with how other coding agents handle authentication. I tested this on macOS, Windows, WSL (ubuntu), and Linux. I wasn't able to test the dbus store on linux but did verify that the fallback works. One quirk is that if you have credentials, during development, every build will have its own ad-hoc binary so the keyring won't recognize the reader as being the same as the write so it may ask for the user's password. I may add an override to disable this or allow users/enterprises to opt-out of the keyring storage if it causes issues. <img width="5064" height="686" alt="CleanShot 2025-09-30 at 19 31 40" src="https://github.com/user-attachments/assets/9573f9b4-07f1-4160-83b8-2920db287e2d" /> <img width="745" height="486" alt="image" src="https://github.com/user-attachments/assets/9562649b-ea5f-4f22-ace2-d0cb438b143e" />
npm i -g @openai/codex
or brew install codex
Codex CLI is a coding agent from OpenAI that runs locally on your computer.
If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex
Quickstart
Installing and running Codex CLI
Install globally with your preferred package manager. If you use npm:
npm install -g @openai/codex
Alternatively, if you use Homebrew:
brew install codex
Then simply run codex to get started:
codex
You can also go to the latest GitHub Release and download the appropriate binary for your platform.
Each GitHub Release contains many executables, but in practice, you likely want one of these:
- macOS
- Apple Silicon/arm64:
codex-aarch64-apple-darwin.tar.gz - x86_64 (older Mac hardware):
codex-x86_64-apple-darwin.tar.gz
- Apple Silicon/arm64:
- Linux
- x86_64:
codex-x86_64-unknown-linux-musl.tar.gz - arm64:
codex-aarch64-unknown-linux-musl.tar.gz
- x86_64:
Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.
Using Codex with your ChatGPT plan
Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Team, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.
You can also use Codex with an API key, but this requires additional setup. If you previously used an API key for usage-based billing, see the migration steps. If you're having trouble with login, please comment on this issue.
Model Context Protocol (MCP)
Codex CLI supports MCP servers. Enable by adding an mcp_servers section to your ~/.codex/config.toml.
Configuration
Codex CLI supports a rich set of configuration options, with preferences stored in ~/.codex/config.toml. For full configuration options, see Configuration.
Docs & FAQ
- Getting started
- Sandbox & approvals
- Authentication
- Non-interactive mode
- Advanced
- Zero data retention (ZDR)
- Contributing
- Install & build
- FAQ
- Open source fund
License
This repository is licensed under the Apache-2.0 License.