MCP Server-Client Example

This project demonstrates a basic implementation of the Model Context Protocol (MCP) using the TypeScript SDK. It includes both a server and client implementation that communicate over stdio transport.

Overview

The example includes:

• An MCP server that provides access to resources
• An MCP client that connects to the server and requests resources
• Basic resource listing and reading functionality

Prerequisites

• Node.js (v16 or higher)
• npm

Installation

Clone the repository and install dependencies:

npm install

Project Structure

src/
  ├── index.ts    # Server implementation
  └── client.ts   # Client implementation

Running the Example

You'll need to run the server and client in separate terminal windows.

1. Start the server:

npm run start:server

2. In a new terminal, start the client:

npm run start:client

The client will:

1. Connect to the server
2. Request a list of available resources
3. Read the content of an example resource

Server Capabilities

The server currently supports:

• Resource listing
• Resource reading
• Basic error handling for unknown resources

Available Resources

The example server provides access to:

• file:///example.txt: A simple text resource

Development

Scripts

• npm run start:server: Starts the MCP server
• npm run start:client: Starts the MCP client

Adding New Resources

To add new resources, modify the ListResourcesRequestSchema handler in src/index.ts:

server.setRequestHandler(ListResourcesRequestSchema, async () => {
  return {
    resources: [
      {
        uri: "file:///example.txt",
        name: "Example Resource",
      },
      // Add new resources here
    ],
  };
});

Dependencies

• @modelcontextprotocol/sdk: MCP TypeScript SDK
• ts-node: TypeScript execution environment
• typescript: TypeScript compiler

License

ISC