MCP Server in JavaScript
A Model Context Protocol (MCP) server implementation using JavaScript and the official MCP SDK.
Overview
This project demonstrates how to build an MCP server that can provide tools and resources to AI assistants. The Model Context Protocol enables secure, standardized connections between AI applications and external data sources.
Features
This MCP server includes the following tools:
- azure-java-sdk-code-samples-mcp-server - Get readme.md for Azure Java SDK, which includes introduction, key concepts, and code samples
Prerequisites
- Node.js (version 18 or higher)
- npm or yarn package manager
Installation
- Clone or download this project
- Install dependencies:
npm install
Usage
Running the Server
Start the MCP server:
npm start
For development with debugging:
npm run dev
Or press F5 in VS Code to start debugging.
Connecting to AI Assistants
This MCP server can be connected to various AI assistants that support the Model Context Protocol:
- Claude Desktop - See
MCP_CONFIG.mdfor configuration details - Continue.dev - VS Code extension that supports MCP
- Other MCP clients - Any client that supports stdio transport
VS Code
Sample mcp.json for connect locally.
{
// 💡 Inputs are prompted on first server start, then stored securely by VS Code.
"inputs": [
],
"servers": {
"azure-java-sdk-mcp": {
"type": "stdio",
"command": "node",
"args": [
"<path-to-index.js>"
]
}
}
}
One may need to "start" it once, to cache the tools.
Available VS Code Tasks
- Run MCP Server - Starts the server normally
- Debug MCP Server - Starts with Node.js inspector for debugging
Development
Project Structure
├── index.js # Main MCP server implementation
├── package.json # Project configuration
├── .github/
│ └── copilot-instructions.md # Copilot customization
└── README.md # This file
Adding New Tools
To add a new tool:
- Add the tool definition in the
ListToolsRequestSchemahandler - Implement the tool logic in the
CallToolRequestSchemahandler - Include proper input validation and error handling
Error Handling
The server uses McpError for proper error responses:
ErrorCode.InvalidRequest- For invalid parametersErrorCode.MethodNotFound- For unknown toolsErrorCode.InternalError- For unexpected errors
MCP Protocol
This server implements the Model Context Protocol specification. For more information about MCP:
License
ISC License