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How to install String Utility Belt 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 String Utility Belt by running "gemini mcp add string-utility-belt npx -y @string-utility-belt/mcp", then type /mcp to check it.

Built from the published package · server updated 5 days ago

  1. 1

    Run the install command

    In a terminal, run:

    gemini mcp add string-utility-belt npx -y @string-utility-belt/mcp
  2. 2

    Check it

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

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

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Questions

Does String Utility Belt work in Gemini CLI?

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

String Utility Belt 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 String Utility Belt safe?

It scores 87 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.