How to install Auth in Gemini CLI

Gemini CLI was replaced by Antigravity CLI in June 2026. On an enterprise licence or paid API key you can still install Auth by running "gemini mcp add auth npx -y @tmcp/auth", then type /mcp to check it.

Built from the published package · server updated 5 days ago

1
Run the install command
In a terminal, run:
```
gemini mcp add auth npx -y @tmcp/auth
```
2
Check it
Inside Gemini CLI, type /mcp to list servers and tools.

MCP servers run with your permissions. If Auth needs an API key, add it under env in the config. Check its README.

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Questions

Does Auth work in Gemini CLI?

Yes. Gemini CLI supports local and remote mcp servers, extensions (legacy), and Auth installs with the steps above.

Auth does not show up in Gemini CLI. What now?

Restart Gemini CLI fully, check the JSON is valid, and make sure Node.js (for npx) is installed. See common MCP errors and fixes.

Is Auth safe?

It scores 83 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.

Run the install command

Check it

Install Auth in another app

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Questions