Cruncher

Overview

Cruncher is a scientific calculator MCP server that brings 43 computational tools directly into your AI workflow. It handles arithmetic, trigonometry, statistics, and unit conversion—letting Claude, Cursor, VS Code, and other MCP clients perform calculations as callable functions rather than requiring manual computation or context switching.

The server runs locally via the npm package @slbdn/cruncher-mcp, communicating over stdio with zero authentication overhead. Install it with npx -y @slbdn/cruncher-mcp. Version v1.2.29 is available under the MIT license, with full source code at islobodan/cruncher-mcp on GitHub.

Cruncher appears in the Development category on mcp.site and works with all major MCP clients including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and Zed. Maintainers can claim this listing to earn a Verified badge and keep information up to date.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "cruncher": {
      "command": "npx",
      "args": [
        "-y",
        "@slbdn/cruncher-mcp"
      ]
    }
  }
}