Master MCP Server

import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js' import express from 'express' import { StreamableHTTPServerTransport } from '@modelcontextprotocol/sdk/server/streamableHttp.js' // Create a simple test MCP server const server = new McpServer({ name: 'test-mcp-server', version: '1.0.0' }, { capabilities: { tools: { listChanged: true }, resources: { listChanged: true } } }) // Register a simple tool server.tool('echo', 'Echoes back the input', { message: { type: 'string' } }, async (args) => { return { content: [{ type: 'text', text: `Echo: ${args.message}` }] } }) // Register a simple resource server.resource('test-resource', 'test://example', { description: 'A test resource' }, async () => { return { contents: [{ uri: 'test://example', text: 'This is a test resource' }] } }) // Create an Express app const app = express() app.use(express.json()) // Create the HTTP streaming transport const transport = new StreamableHTTPServerTransport({ sessionIdGenerator: undefined, // Stateless mode enableJsonResponse: false, // Use SSE by default enableDnsRebindingProtection: false }) // Connect the server to the transport await server.connect(transport) // Handle MCP requests app.post('/mcp', async (req, res) => { try { await transport.handleRequest(req, res, req.body) } catch (error) { console.error('MCP request handling failed', { error }) res.status(500).json({ error: 'Internal server error' }) } }) app.get('/mcp', async (req, res) => { try { await transport.handleRequest(req, res) } catch (error) { console.error('MCP request handling failed', { error }) res.status(500).json({ error: 'Internal server error' }) } }) // Expose the capabilities endpoint app.get('/capabilities', (req, res) => { res.json({ tools: [ { name: 'echo', description: 'Echoes back the input', inputSchema: { type: 'object', properties: { message: { type: 'string' } }, required: ['message'] } } ], resources: [ { uri: 'test://example', name: 'test-resource', description: 'A test resource' } ] }) }) // Start the server const port = process.env.PORT || 3006 app.listen(port, () => { console.log(`Test MCP server listening on http://localhost:${port}`) })