PluginBench
MCP Server

Cruncher MCP Server

io.github.islobodan/cruncher-mcp

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What is the Cruncher MCP server?

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

How to install Cruncher

Copy-paste configuration for popular MCP clients.

transport: stdio
Config generated by PluginBench — verify against the source before use.
Environment / auth
  • CRUNCHER_TOOL_SET

    Tool exposure tier: 'minimal' (5 tools), 'standard' (34 tools, default), or 'full' (43 tools)

  • CRUNCHER_TIMEOUT

    Worker thread timeout in milliseconds for heavy calculations (default: 3000, range: 100-60000)

Claude Desktop
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "cruncher-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@slbdn/cruncher-mcp"
      ],
      "env": {
        "CRUNCHER_TOOL_SET": "<YOUR_CRUNCHER_TOOL_SET>",
        "CRUNCHER_TIMEOUT": "<YOUR_CRUNCHER_TIMEOUT>"
      }
    }
  }
}
Cursor
~/.cursor/mcp.json
{
  "mcpServers": {
    "cruncher-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@slbdn/cruncher-mcp"
      ],
      "env": {
        "CRUNCHER_TOOL_SET": "<YOUR_CRUNCHER_TOOL_SET>",
        "CRUNCHER_TIMEOUT": "<YOUR_CRUNCHER_TIMEOUT>"
      }
    }
  }
}
Windsurf
~/.codeium/windsurf/mcp_config.json
{
  "mcpServers": {
    "cruncher-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@slbdn/cruncher-mcp"
      ],
      "env": {
        "CRUNCHER_TOOL_SET": "<YOUR_CRUNCHER_TOOL_SET>",
        "CRUNCHER_TIMEOUT": "<YOUR_CRUNCHER_TIMEOUT>"
      }
    }
  }
}
VS Code
.vscode/mcp.json
{
  "servers": {
    "cruncher-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@slbdn/cruncher-mcp"
      ],
      "env": {
        "CRUNCHER_TOOL_SET": "<YOUR_CRUNCHER_TOOL_SET>",
        "CRUNCHER_TIMEOUT": "<YOUR_CRUNCHER_TIMEOUT>"
      }
    }
  }
}
Claude Code
claude mcp add cruncher-mcp --env CRUNCHER_TOOL_SET=<YOUR_CRUNCHER_TOOL_SET> --env CRUNCHER_TIMEOUT=<YOUR_CRUNCHER_TIMEOUT> -- npx -y @slbdn/cruncher-mcp

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