githejie/mcp-server-calculator

Overview

A Model Context Protocol server that exposes calculator functionality as a tool for AI agents. It wraps basic arithmetic operations into a standardized MCP interface, allowing LLMs to perform calculations by calling the server.

Best for

Best for
Developers building MCP-based agents that need deterministic arithmetic without relying on LLM math

Use cases

• Enabling an LLM to compute precise arithmetic results during a conversation
• Integrating a reliable calculator into an MCP-compatible agent workflow
• Offloading numerical computation from an LLM to a deterministic Python backend

How to use

Install

pip install mcp-server-calculator

Tools exposed

• calculate

Example client config

{\n  "mcpServers": {\n    "calculator": {\n      "command": "uvx",\n      "args": ["mcp-server-calculator"]\n    }\n  }\n}

Notes

A Model Context Protocol server that exposes calculator functionality as a tool for AI agents. It wraps basic arithmetic operations into a standardized MCP interface, allowing LLMs to perform calculations by calling the server.

148 stars on GitHub. Last updated 2025-05-10. Licensed MIT.

Use cases

• Enabling an LLM to compute precise arithmetic results during a conversation
• Integrating a reliable calculator into an MCP-compatible agent workflow
• Offloading numerical computation from an LLM to a deterministic Python backend

Pros

• Simple, focused tool with a clear single purpose
• Leverages MCP for standardized agent integration
• Lightweight Python implementation with 148 GitHub stars

Cons

• Limited to basic arithmetic with no advanced math functions
• Requires an MCP-compatible host to be useful
• No built-in error handling for edge cases like division by zero

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.