Calculator MCP Server

Calculator MCP Server

Provides basic arithmetic operations and advanced mathematical functions through the Model Context Protocol (MCP), with features like calculation history tracking and expression evaluation.

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README

计算器 MCP 服务器

这是一个使用 Model Context Protocol (MCP) 开发的计算器服务器,提供基本的算术运算功能。

功能特点

基本计算器功能

  • 加法、减法、乘法、除法的基本运算
  • 自动记录计算历史
  • 通过资源 API 访问帮助信息和历史记录

高级计算器功能

  • 幂运算和平方根计算
  • 表达式计算(使用安全的表达式求值)
  • 资源更新通知(当历史记录更新时)

安装要求

  1. Python 3.7 或更高版本
  2. MCP Python SDK

安装步骤

  1. 克隆或下载此仓库
  2. 安装依赖项:
pip install -r requirements.txt

使用方法

运行基本计算器服务器

python calculator_server.py

或者使用 MCP 命令:

mcp run calculator_server.py

运行高级计算器服务器

python advanced_calculator_server.py

运行客户端示例

python calculator_client.py

可用工具

基本工具:

  • add(a, b): 计算 a + b
  • subtract(a, b): 计算 a - b
  • multiply(a, b): 计算 a * b
  • divide(a, b): 计算 a / b

高级工具(仅在高级计算器中可用):

  • power(base, exponent): 计算 base 的 exponent 次幂
  • sqrt(value): 计算平方根
  • evaluate_expression(expression): 计算数学表达式字符串

可用资源

  • calculator://help: 获取帮助信息
  • calculator://history: 获取计算历史记录

示例代码

使用 Python 客户端调用计算器服务器

from mcp import ClientSession, StdioServerParameters
from mcp.client.stdio import stdio_client
import asyncio

async def main():
    server_params = StdioServerParameters(
        command="python",
        args=["advanced_calculator_server.py"],
    )
    
    async with stdio_client(server_params) as (read, write):
        async with ClientSession(read, write) as session:
            await session.initialize()
            
            # 调用加法工具
            result = await session.call_tool("add", {"a": 5, "b": 3})
            print(f"5 + 3 = {result}")
            
            # 读取计算历史
            history, _ = await session.read_resource("calculator://history")
            print(history)

if __name__ == "__main__":
    asyncio.run(main())

项目结构

  • calculator_server.py: 基本计算器 MCP 服务器
  • advanced_calculator_server.py: 高级计算器 MCP 服务器,带有更多功能
  • calculator_client.py: 计算器客户端示例
  • requirements.txt: 项目依赖
  • README.md: 项目文档

进一步开发

你可以通过以下方式扩展这个计算器服务器:

  1. 添加更多数学函数(如三角函数、对数等)
  2. 实现更复杂的表达式解析器
  3. 添加图形界面
  4. 实现持久化存储计算历史
  5. 添加用户自定义变量和函数

许可证

MIT 许可证

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