Calculator

Verified Integration

Author: @pointing•Category: ServerApplication

GitHub Repository

JSON-RPC 2.0

Protocol Standard

Sub-second

Execution Latency

Active

Operational Status

Client Configuration

— Connect Calculator to Claude Desktop or Cursor in seconds

{
  "mcpServers": {
    "calculator-22": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-calculator-22"
      ],
      "env": {}
    }
  }
}

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).

Architecture & Capabilities

System Overview

Enables any LLM to perform and verify mathematical computations including evaluation, simplification, and symbolic differentiation.

Indexed Date

7/22/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Calculator

It utilizes a hardened math.js v15 instance with sandboxed evaluation via `vm.runInNewContext()`, includes configurable timeouts, and performs extensive input and result validation to prevent dangerous operations and ensure secure, reliable results.

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