npx mcpbar@latest edit -c claude

Generic MCP Server Template

A modular, extensible Model Context Protocol (MCP) server template designed for easy customization and extension.

Features

• Modular Architecture: Clear separation of concerns with a well-defined structure
• Small, Focused Files: Better maintainability and easier for AI to ingest
• Easy Extension Points: Simple patterns for adding new tools and services
• Comprehensive Error Handling: Robust error management throughout the codebase
• Type Safety: Full TypeScript support with proper typing

Project Structure

generic-mcp-template/
├── src/
│   ├── services/       # Service classes for API interactions
│   │   ├── base-service.ts        # Abstract base service with common functionality
│   │   └── example-service.ts     # Example service implementation
│   ├── tools/          # MCP tool definitions and handlers
│   │   ├── example-tools.ts       # Tool definitions (name, description, schema)
│   │   └── example-tool-handlers.ts # Tool handler implementations
│   ├── types/          # TypeScript type definitions
│   │   └── example-types.ts       # Example type definitions
│   ├── config.ts       # Configuration management
│   └── index.ts        # Main entry point
├── .env.example        # Example environment variables
├── package.json        # Project dependencies and scripts
├── tsconfig.json       # TypeScript configuration
└── README.md           # Project documentation

Getting Started

Prerequisites

• Node.js 18 or higher
• npm or yarn

Installation

1. Clone this repository:

   git clone https://github.com/v4lheru/generic-mcp-template.git
   cd generic-mcp-template
   

2. Install dependencies:

   npm install
   

3. Create a .env file based on .env.example:

   cp .env.example .env
   

4. Edit the .env file with your API keys and configuration.

Building and Running

1. Build the project:

   npm run build
   

2. Run the server:

   npm start
   

Extending the Template

Adding a New Service

1. Create a new service file in src/services/:

   // src/services/my-service.ts
   import { BaseService } from './base-service.js';
   import config from '../config.js';
   
   export class MyService extends BaseService {
       // Implement your service...
   }
   

2. Add any necessary types in src/types/.

Adding New Tools

1. Define your tools in a new file or extend the existing one in src/tools/:

   // src/tools/my-tools.ts
   export const myTools = [
       {
           name: "my_tool",
           description: "Description of my tool",
           inputSchema: {
               // JSON Schema for the tool's input
           }
       }
   ];
   

2. Implement handlers for your tools:

   // src/tools/my-tool-handlers.ts
   import { MyService } from '../services/my-service.js';
   
   export function createMyToolHandlers(myService: MyService) {
       return {
           my_tool: async (args: any) => {
               // Implement your tool handler
           }
       };
   }
   

3. Register your tools and handlers in src/index.ts.

Configuration

The template uses a centralized configuration system in src/config.ts. Configuration can be provided through:

• Environment variables
• Command line arguments (with --env KEY=VALUE)
• Default values in the code

Error Handling

The template includes comprehensive error handling:

• Service-level error handling with rate limiting support
• Tool-level error handling with proper error messages
• MCP protocol error handling

License

MIT