About
Evaluate mathematical expressions.
README
项目简介
Cal Server 是一个基于 FastMCP 框架构建的简单数学表达式计算服务,使用 Bun 运行时环境。它利用 expr-eval 库解析和计算用户输入的数学表达式,并通过标准输入输出(stdio)与外界交互。该项目旨在提供一个轻量、高效的计算工具,支持基本数学运算和内置常量。
功能
- 表达式计算:支持用户输入数学表达式并返回计算结果。
- 内置常量:
E:Bun 环境中的Math.E。PI:Bun 环境中的Math.PI。true:逻辑真值。false:逻辑假值。
- 工具名称:
cal。 - 参数:接受一个字符串类型的数学表达式(
exp)。
依赖
fastmcp:用于构建 MCP 服务。expr-eval:用于解析和计算数学表达式。zod:用于参数验证。
前置条件
- 确保已安装 Bun 运行时(推荐最新版本)。
安装
Installing via Smithery
To install cal-mcp for Claude Desktop automatically via Smithery:
npx -y @smithery/cli install @pwh-pwh/cal-mcp --client claude
mcp客户端配置
"cal-mcp": {
"name": "计算",
"description": "",
"isActive": true,
"command": "bunx",
"args": [
"cal-mcp"
]
}
Manual Installation
- 克隆项目仓库:
git clone <仓库地址> - 进入项目目录并安装依赖:
bun install
使用方法
启动服务:
bun run index.ts服务将通过标准输入输出(stdio)运行。
输入数学表达式:
- 示例输入:
2 + 3 * PI - 输出:计算结果(字符串形式)。
- 示例输入:
支持的表达式示例:
- 基本运算:
2 + 2→4 - 使用常量:
PI * 2→6.283185307179586 - 复杂表达式:
E ^ 2 + 1→8.38905609893065
- 基本运算:
注意事项
- 输入的表达式必须是有效的数学表达式,否则可能抛出错误。
- 服务当前仅支持通过
stdio交互。 - 项目使用 Bun 运行时,确保命令与 Bun 兼容。
Hosted deployment
A hosted deployment is available on Fronteir AI.
Installing pwh-pwh/cal-mcp
This server has no published package — it is built from source. Open the repository and follow its README.
▸ github.com/pwh-pwh/cal-mcpFAQ
Is pwh-pwh/cal-mcp MCP free?
Yes, pwh-pwh/cal-mcp MCP is free — one-click install via Unyly at no cost.
Does pwh-pwh/cal-mcp need an API key?
No, pwh-pwh/cal-mcp runs without API keys or environment variables.
Is pwh-pwh/cal-mcp hosted or self-hosted?
Self-hosted: the server runs locally on your machine via the install command above.
How do I install pwh-pwh/cal-mcp in Claude Desktop, Claude Code or Cursor?
Open pwh-pwh/cal-mcp on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
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