How to install Kernel 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 Kernel by running "gemini mcp add kernel npx -y @metaharness/kernel", then type /mcp to check it.

Built from the published package · server updated 2 days ago

Run the install command

In a terminal, run:

gemini mcp add kernel npx -y @metaharness/kernel

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

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

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Questions

Does Kernel work in Gemini CLI?

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

Kernel 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 Kernel safe?

It scores 86 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.