Auth + API key — sign-in paths for Codex CLI Four ways to authenticate Codex CLI — ChatGPT OAuth (browser), device code (headless), API key, and Azure OpenAI / Amazon Bedrock providers. Plus credential storage modes, corporate CA setup, and what differs between ChatGPT-plan and API-key sign-in. Codex CLI is OpenAI’s coding agent that you can run locally from your terminal. It can read, change, and run code on your machine in the selected directory. It’s open source and built in Rust for speed and efficiency. ChatGPT Plus, Pro, Business, Edu, and Enterprise plans include Codex. Learn more about what’s included. Manage multiple OpenAI Codex CLI accounts from the command line. If you use multiple ChatGPT Pro/Plus subscriptions for Codex CLI — for parallel batch evaluation, team usage, or quota management — this tool lets you switch between accounts, check real-time quota, and validate token health without manually copying auth.json files. Complete Codex CLI guide 2026: what it is, install, ChatGPT auth, approval modes, sandbox basics, and troubleshooting for coding automation. First, log into your OpenAI account using the standard Codex CLI. This command creates the ~/.codex directory containing your authentication token and configuration. The Codex CLI manages authentication directly with OpenAI. Step 1.2: Save Your First Account Once authenticated, save this account configuration with a memorable name: Before choosing an auth method, understand that Codex CLI operates across two fundamentally different billing models 1. ChatGPT sign-in is the default and recommended path for most developers. API key auth is suited to automation pipelines, custom harnesses, or teams that already manage OpenAI API spend through their platform account 1. This cheat sheet covers every command, shortcut, configuration option, and workflow pattern for Codex CLI. Installation Install Codex CLI via npm, Homebrew, or direct binary download. Authenticate with your ChatGPT account or API key: Switch between multiple OpenAI Codex CLI accounts without logging out and back in. Saves auth token snapshots to ~/.codex/accounts/ and swaps ~/.codex/auth.json instantly. A CLI tool to switch and manage Codex accounts. Contribute to Loongphy/codex-auth development by creating an account on GitHub. The CLI inherits most defaults from ~/.codex/config.toml. Any -c key=value overrides you pass at the command line take precedence for that invocation. See Config basics for more information. A beautifully minimal, searchable handbook of OpenAI Codex CLI commands, shortcuts, and examples.