Calculator

Verified Integration

Author: @spawning•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-18": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-calculator-18"
      ],
      "env": {}
    }
  }
}

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

Architecture & Capabilities

System Overview

Provides a server-sent events (SSE) based service for performing a variety of mathematical calculations.

Indexed Date

7/22/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Calculator

The Calculator is an SSE (Server-Sent Events) based server that provides real-time mathematical calculation services. It's designed to perform a wide range of operations and facilitate communication via the Model Context Protocol (MCP).

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