Skip to content
mcp/harbor
Gemini CLI

Cruncher for Gemini CLI

io.github.islobodan/cruncher-mcp

Scientific calculator MCP server with 43 tools: arithmetic, trig, stats, unit conversion.

client:Gemini CLI transport:stdio runtime:npm

Install Cruncher in Gemini CLI

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

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "cruncher-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@slbdn/cruncher-mcp"
      ],
      "env": {
        "CRUNCHER_TOOL_SET": "<CRUNCHER_TOOL_SET>",
        "CRUNCHER_TIMEOUT": "<CRUNCHER_TIMEOUT>"
      }
    }
  }
}

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

Cruncher in other clients

Cruncher MCP server