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How to install MCP App Extension 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 MCP App Extension by running "gemini mcp add mcp-app-extension npx -y @stackable-labs/mcp-app-extension", then type /mcp to check it.

Built from the published package · server updated 6 days ago

  1. 1

    Run the install command

    In a terminal, run:

    gemini mcp add mcp-app-extension npx -y @stackable-labs/mcp-app-extension
  2. 2

    Check it

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

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

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Questions

Does MCP App Extension work in Gemini CLI?

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

MCP App Extension 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 MCP App Extension safe?

It scores 76 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.