How to install Unity MCP 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 Unity MCP CLI by running "gemini mcp add unity-mcp-cli npx -y unity-mcp-cli", then type /mcp to check it.

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Run the install command

In a terminal, run:

gemini mcp add unity-mcp-cli npx -y unity-mcp-cli

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

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

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Questions

Does Unity MCP CLI work in Gemini CLI?

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

Unity MCP 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 Unity MCP CLI safe?

It scores 94 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.