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How to install Hypermail 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 Hypermail MCP by running "gemini mcp add hypermail-mcp npx -y hypermail-mcp", then type /mcp to check it.
Built from the published package · server updated 3 days ago
- 1
Run the install command
In a terminal, run:
gemini mcp add hypermail-mcp npx -y hypermail-mcp - 2
Check it
Inside Gemini CLI, type /mcp to list servers and tools.
MCP servers run with your permissions. If Hypermail MCP needs an API key, add it under env in the config. Check its README.
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Questions
Does Hypermail MCP work in Gemini CLI?
Yes. Gemini CLI supports local and remote mcp servers, extensions (legacy), and Hypermail MCP installs with the steps above.
Hypermail 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 Hypermail MCP safe?
It scores 79 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.