How to install Eharness 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 Eharness by running "gemini mcp add eharness npx -y eharness", then type /mcp to check it.
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Run the install command
In a terminal, run:
gemini mcp add eharness npx -y eharness - 2
Check it
Inside Gemini CLI, type /mcp to list servers and tools.
MCP servers run with your permissions. If Eharness needs an API key, add it under env in the config. Check its README.
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Questions
Does Eharness work in Gemini CLI?
Yes. Gemini CLI supports local and remote mcp servers, extensions (legacy), and Eharness installs with the steps above.
Eharness 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 Eharness safe?
It scores 78 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.
