How to install Guardian CLI 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 Guardian CLI by running "gemini mcp add guardian-cli npx -y @contextecf/guardian-cli", then type /mcp to check it.

Built from the published package · server updated 8 days ago

Run the install command

In a terminal, run:

gemini mcp add guardian-cli npx -y @contextecf/guardian-cli

2
Check it
Inside Gemini CLI, type /mcp to list servers and tools.

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

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Questions

Does Guardian CLI work in Gemini CLI?

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

Guardian CLI 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 Guardian CLI safe?

It scores 68 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.