How to install What Devtools MCP 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 What Devtools MCP by running "gemini mcp add what-devtools-mcp npx -y what-devtools-mcp", then type /mcp to check it.
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Run the install command
In a terminal, run:
gemini mcp add what-devtools-mcp npx -y what-devtools-mcp - 2
Check it
Inside Gemini CLI, type /mcp to list servers and tools.
MCP servers run with your permissions. If What Devtools MCP needs an API key, add it under env in the config. Check its README.
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Questions
Does What Devtools MCP work in Gemini CLI?
Yes. Gemini CLI supports local and remote mcp servers, extensions (legacy), and What Devtools MCP installs with the steps above.
What Devtools MCP 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 What Devtools MCP safe?
It scores 77 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.
