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How to install Portal 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 Portal MCP by running "gemini mcp add portal-mcp npx -y @blackmatter/portal-mcp", then type /mcp to check it.

Built from the published package · server updated 15 days ago

  1. 1

    Run the install command

    In a terminal, run:

    gemini mcp add portal-mcp npx -y @blackmatter/portal-mcp
  2. 2

    Check it

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

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

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Questions

Does Portal MCP work in Gemini CLI?

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

Portal 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 Portal MCP safe?

It scores 57 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.