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How to install Substack MCP Plus 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 Substack MCP Plus by running "gemini mcp add substack-mcp-plus npx -y substack-mcp-plus", then type /mcp to check it.

Built from the published package · server updated 5 months ago

  1. 1

    Run the install command

    In a terminal, run:

    gemini mcp add substack-mcp-plus npx -y substack-mcp-plus
  2. 2

    Check it

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

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

Install Substack MCP Plus in another app

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Questions

Does Substack MCP Plus work in Gemini CLI?

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

Substack MCP Plus 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 Substack MCP Plus safe?

It scores 59 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.