Calculator MCP Server

calculator

A Model Context Protocol (MCP) server built with mcp-framework.

Quick Start

# Install dependencies
npm install

# Build the project
npm run build

Project Structure

calculator/
├── src/
│   ├── tools/        # MCP Tools
│   │   └── ExampleTool.ts
│   └── index.ts      # Server entry point
├── package.json
└── tsconfig.json

Adding Components

The project comes with an example tool in src/tools/ExampleTool.ts. You can add more tools using the CLI:

# Add a new tool
mcp add tool my-tool

# Example tools you might create:
mcp add tool data-processor
mcp add tool api-client
mcp add tool file-handler

Tool Development

Example tool structure:

import { MCPTool } from "mcp-framework";
import { z } from "zod";

interface MyToolInput {
  message: string;
}

class MyTool extends MCPTool<MyToolInput> {
  name = "my_tool";
  description = "Describes what your tool does";

  schema = {
    message: {
      type: z.string(),
      description: "Description of this input parameter",
    },
  };

  async execute(input: MyToolInput) {
    // Your tool logic here
    return `Processed: ${input.message}`;
  }
}

export default MyTool;

Publishing to npm

Update your package.json:
- Ensure name is unique and follows npm naming conventions
- Set appropriate version
- Add description, author, license, etc.
- Check bin points to the correct entry file
Build and test locally:
npm run build npm link calculator # Test your CLI locally
Login to npm (create account if necessary):
npm login
Publish your package:
npm publish

After publishing, users can add it to their claude desktop client (read below) or run it with npx

## Using with Claude Desktop

### Installing via Smithery

To install Calculator for Claude Desktop automatically via [Smithery](https://smithery.ai/server/@QuantGeekDev/mcp-add-sse):

```bash
npx -y @smithery/cli install @QuantGeekDev/mcp-add-sse --client claude

Local Development

Add this configuration to your Claude Desktop config file:

MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "calculator": {
      "command": "node",
      "args":["/absolute/path/to/calculator/dist/index.js"]
    }
  }
}

After Publishing

Add this configuration to your Claude Desktop config file:

MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "calculator": {
      "command": "npx",
      "args": ["calculator"]
    }
  }
}

Building and Testing

Make changes to your tools
Run npm run build to compile
The server will automatically load your tools on startup

Learn More

This server cannot be installed

security - not tested

license - not found

quality - not tested

A Model Context Protocol server built with mcp-framework that allows users to create and manage custom tools for processing data, integrating with the Claude Desktop via CLI.

Related Resources

Reddit Discussion about this server

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