Claude Multi Auth is an open-source tool consisting of the cma command and a menu bar application, allowing you to manage multiple Claude accounts and switch accounts for Claude Code, Claude Desktop, or both with just one command or click, without needing to log out.

If you use multiple Claude accounts for work and personal projects, the manual switching can be quite inconvenient. In particular, logging out of Claude Desktop will cause the login session to be revoked on the server. Claude Multi Auth helps reduce the switching actions while keeping the Claude Desktop history separate for each account.

Main features:

1. Switch accounts for Claude Code, Claude Desktop, or both simultaneously from the command line or menu bar.
2. Enable session follow so that Code/Cowork sessions transfer to the new account. Active Claude sessions receive a new token within about 30 seconds.
3. View usage levels over 5 hours and 7 days for each account to proactively choose the appropriate account.
4. All changes have backups, are verified, and automatically roll back when needed; you can use cma restore to undo.
5. Tokens are stored in Keychain, not printed or written to a file. The application can start with the machine; the command supports --json for integration into automated workflows.

This tool is suitable for programmers using Claude Code, users of Claude Desktop/Cowork, and anyone frequently switching between multiple Claude accounts for different work contexts.

To get started, on macOS 13 or later, run npx claude-multi-auth and then choose to install the cma command, the menu bar application, or both. The Linux and Windows versions will be available soon.

The difference with Claude Multi Auth is that it not only supports account switching but also addresses the accompanying inconveniences: keeping the Desktop history separate, allowing sessions to follow to the new account, and updating tokens for running sessions. Combining the menu bar interface with the command line, the tool caters to both quick mouse switching needs and integration into a programmer's workflow.