Master MCP Server

#!/usr/bin/env node // Simple test STDIO server for testing purposes const fs = require('fs') // Simple JSON-RPC server that echoes back requests let messageId = 0 // Function to send a response function sendResponse(response) { process.stdout.write(JSON.stringify(response) + '\n') } // Function to send a notification function sendNotification(notification) { process.stdout.write(JSON.stringify(notification) + '\n') } // Handle incoming requests process.stdin.on('data', (data) => { try { const lines = data.toString().split('\n').filter(line => line.trim() !== '') for (const line of lines) { if (line.trim() === '') continue const request = JSON.parse(line) // Handle initialize request if (request.method === 'initialize') { const response = { jsonrpc: '2.0', id: request.id, result: { protocolVersion: '2025-06-18', capabilities: { tools: { listChanged: true }, resources: { listChanged: true } }, serverInfo: { name: 'test-stdio-server', version: '1.0.0' } } } sendResponse(response) } // Handle tools/list request else if (request.method === 'tools/list') { const response = { jsonrpc: '2.0', id: request.id, result: { tools: [ { name: 'stdio-echo', description: 'Echoes back the input', inputSchema: { type: 'object', properties: { message: { type: 'string' } }, required: ['message'] } } ] } } sendResponse(response) } // Handle resources/list request else if (request.method === 'resources/list') { const response = { jsonrpc: '2.0', id: request.id, result: { resources: [ { uri: 'stdio://example/resource', name: 'stdio-resource', description: 'A test resource from STDIO server' } ] } } sendResponse(response) } // Handle tools/call request else if (request.method === 'tools/call') { const response = { jsonrpc: '2.0', id: request.id, result: { content: [ { type: 'text', text: `STDIO Echo: ${request.params.arguments?.message || 'No message'}` } ] } } sendResponse(response) } // Handle resources/read request else if (request.method === 'resources/read') { const response = { jsonrpc: '2.0', id: request.id, result: { contents: [ { uri: request.params.uri, text: 'This is content from a STDIO server resource', mimeType: 'text/plain' } ] } } sendResponse(response) } // Handle unknown methods else { const response = { jsonrpc: '2.0', id: request.id, error: { code: -32601, message: `Method not found: ${request.method}` } } sendResponse(response) } } } catch (err) { // Send error response const errorResponse = { jsonrpc: '2.0', id: null, error: { code: -32700, message: 'Parse error', data: err.message } } sendResponse(errorResponse) } }) // Send a notification that the server is ready sendNotification({ jsonrpc: '2.0', method: 'notifications/initialized', params: {} }) console.error('Test STDIO server started')