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How to install MCP Upstream 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 MCP Upstream by running "gemini mcp add mcp-upstream npx -y @sbissoli/mcp-upstream", then type /mcp to check it.

Built from the published package · server updated 2 days ago

  1. 1

    Run the install command

    In a terminal, run:

    gemini mcp add mcp-upstream npx -y @sbissoli/mcp-upstream
  2. 2

    Check it

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

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

Install MCP Upstream in another app

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Questions

Does MCP Upstream work in Gemini CLI?

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

MCP Upstream 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 MCP Upstream safe?

It scores 82 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.