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Cruncher

io.github.islobodan/cruncher-mcp · v1.2.29

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

Connect Runs on your machine

Terminal
claude mcp add cruncher-mcp -e CRUNCHER_TOOL_SET=<CRUNCHER_TOOL_SET> -e CRUNCHER_TIMEOUT=<CRUNCHER_TIMEOUT> -- npx -y @slbdn/[email protected]
claude_desktop_config.json
{
  "mcpServers": {
    "cruncher-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@slbdn/[email protected]"
      ],
      "env": {
        "CRUNCHER_TOOL_SET": "<CRUNCHER_TOOL_SET>",
        "CRUNCHER_TIMEOUT": "<CRUNCHER_TIMEOUT>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "cruncher-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@slbdn/[email protected]"
      ],
      "env": {
        "CRUNCHER_TOOL_SET": "<CRUNCHER_TOOL_SET>",
        "CRUNCHER_TIMEOUT": "<CRUNCHER_TIMEOUT>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "cruncher-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@slbdn/[email protected]"
      ],
      "env": {
        "CRUNCHER_TOOL_SET": "<CRUNCHER_TOOL_SET>",
        "CRUNCHER_TIMEOUT": "<CRUNCHER_TIMEOUT>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
CRUNCHER_TOOL_SET
Optional
Tool exposure tier: 'minimal' (5 tools), 'standard' (34 tools, default), or 'full' (43 tools)
CRUNCHER_TIMEOUT
Optional
Worker thread timeout in milliseconds for heavy calculations (default: 3000, range: 100-60000)

Details

Package@slbdn/[email protected] (NPM, stdio)
First published8 May 2026
Last updated8 May 2026
Registry nameio.github.islobodan/cruncher-mcp

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