Setting Up MCP Servers

pip install mcp-server

{
  "name": "my-ai-server",
  "version": "1.0.0",
  "description": "AI-assisted development server",
  "entrypoint": "./server.js",
  "capabilities": [
    "code-completion",
    "code-generation"
  ]
}

const { McpServer } = require("@modelcontextprotocol/sdk");

const server = new McpServer({
  name: "my-custom-server",
  version: "1.0.0"
});

server.registerHandler("model/list", async () => {
  return {
    models: [
      {
        id: "gpt-4",
        name: "GPT-4",
        description: "Advanced language model"
      }
    ]
  };
});

server.start();

server.registerHandler("tool/invoke", async (request) => {
  const { toolName, parameters } = request;
  
  if (toolName === "weather") {
    return {
      result: `Current weather in ${parameters.city}: 22°C, sunny`
    };
  }
  
  throw new Error(`Unknown tool: ${toolName}`);
});

const tool = {
  name: "CodeCompletionTool",
  description: "Provides code completion suggestions",
  parameters: {
    language: "javascript",
    maxTokens: 100
  }
};

fetch("http://localhost:3000/tools", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify(tool)
});

const handler = {
  event: "onCodeChange",
  callback: function(event) {
    console.log("Code changed: " + event.code);
  }
};

fetch("http://localhost:3000/handlers", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify(handler)
});

mkdir mcp-test-server
cd mcp-test-server
npm init -y
npm install @modelcontextprotocol/sdk

curl -X POST http://localhost:3000/v1/mcp/health

import { Client } from '@modelcontextprotocol/sdk';

const client = new Client({
  serverUrl: 'http://localhost:3000',
});

await client.connect();
console.log('Connected to MCP server');

const express = require('express');
const { createServer } = require('http');
const { Server } = require('socket.io');

const app = express();
const server = createServer(app);
const io = new Server(server, {
  cors: {
    origin: '*',
  },
});

io.on('connection', (socket) => {
  console.log('Client connected');
  socket.on('message', (data) => {
    // Handle MCP protocol messages
    console.log('Received:', data);
  });
});

server.listen(3000, () => {
  console.log('MCP server running on port 3000');
});

export MCP_SERVER_PORT=8080
export MCP_SERVER_HOST=0.0.0.0
export MCP_SERVER_LOG_LEVEL=debug
export MCP_SERVER_CONFIG_PATH=/etc/mcp/config.json
export MCP_SERVER_MODEL_ID=gpt-4o

const mcpConfig = {
  apiKey: process.env.MCP_API_KEY,
  serverUrl: 'https://mcp.example.com',
  timeout: 5000
};

async function refreshOAuthToken() {
  const response = await fetch('/auth/refresh', {
    method: 'POST',
    headers: { 'Authorization': `Bearer ${oldToken}` }
  });
  const data = await response.json();
  return data.newToken;
}