Ddd Template

This repository is a template implementation of a Model Context Protocol (MCP) server in Node.js/TypeScript, designed to demonstrate a clean, layered architecture using Domain-Driven Design (DDD) principles. It provides tools to obtain Bitcoin-related information via external APIs.

✨ Key Features

• 🏗️ Template Project: This codebase serves as a reference template for structuring MCP servers with DDD, ready for customization and production use.
• 🔌 MCP Protocol: Communicates via stdio using the MCP protocol (@modelcontextprotocol/sdk).
• 🏛️ Layered DDD Architecture: Clear separation of domain, application, infrastructure, and interface layers.
• ⚡ TypeScript: Fully typed with modern TypeScript for better development experience.

📁 Project Structure

src/
├── domain/                  # 🏛️ Domain models and response interfaces
│   └── models/
│       └── responses/
│           ├── ** interfaces responses **
├── infrastructure/          # 🔌 External API clients and request services
│   ├── interfaces/
│   │   └── IApiClient.ts
│   └── services/
│       ├── clients/
│       │   └── ** client api
│       └── requests/
│           ├── ** requests services **
├── application/             # ⚙️ Business logic and helpers
│   ├── services/
│   │   ├── ** services implementation **
│   └── helpers/
│       └── ** helpers **
├── interface/               # 🎮 Controllers (MCP tool registration)
│   └── controllers/
│       ├── base/
│       │   └── BaseToolsController.ts
│       ├── **controllers to inteface**
│       └── index.ts
├── shared/                  # 🔗 Shared types/parameters
│   └── parameters/
│       └── **interfaces parameters**
└── main.ts                  # 🚀 Application entry point

🚀 Getting Started

git clone https://github.com/alexandresanlim/mcp-server-ddd-template.git
cd mcp-server-ddd-template
npm install
npm run build

🎯 Usage

After building, you can run the server directly:

node build/main.js

Or, if registered as a binary (for example, mcp-server-ddd-template):

npm link
mcp-server-ddd-template

The server will start on standard output (stdio) and wait for MCP requests.

🛠️ Available Tools in this sample

• 💰 get-recommended-fees: Get recommended Bitcoin transaction fees from Mempool.space
• 🔗 ping: Simple health check endpoint

🔗 Integration Example

To use this MCP server as a tool provider in a client (e.g., Claude client), you can either reference a local build or use the published npm package.

📂 Using Local Build Path

"btc-server": {
    "command": "node",
    "args": [
        "{your project path}/mcp-server-ddd-template/build/main.js"
    ]
}

🛠️ Development

Build Commands

# Build for Unix/Linux/macOS
npm run build

# Build for Windows
npm run build:windows

# Run the server
npm run server

Dependencies

• @modelcontextprotocol/sdk: MCP protocol implementation
• zod: Runtime type validation
• typescript: Type safety and compilation

🤝 Contributing

Pull requests are welcome! Feel free to open issues or suggest improvements for this template repository.

⭐ Star this repository if you find it helpful!