Calculator for Gemini CLI

io.github.slettmayer/calc-mcp-server

Exact arithmetic: one calculator tool over an AST allowlist, with integers exact at any size.

client:Gemini CLI transport:stdio runtime:pypi

Install Calculator in Gemini CLI

~/.gemini/settings.json · windows: %USERPROFILE%\.gemini\settings.json

{
  "mcpServers": {
    "calc-mcp-server": {
      "command": "uvx",
      "args": [
        "calc-mcp-server"
      ]
    }
  }
}

Gemini expands $VAR and ${VAR} inside env values, so a secret can live in your shell rather than this file. Gemini CLI docs