GitHub PR Review Server

import express from 'express'; import rateLimit from 'express-rate-limit'; import { reviewPullRequest } from './handlers/review.js'; // This is a basic hosted server setup // For a full MCP implementation, you would need to implement the MCP protocol over HTTP/SSE // This example shows the basic structure for hosting const validApiKeys = process.env.VALID_API_KEYS?.split(',') || []; const app = express(); const port = process.env.PORT || 3000; // Middleware app.use(express.json()); const limiter = rateLimit({ windowMs: 15 * 60 * 1000, // 15 minutes max: 100, // limit each IP to 100 requests per windowMs message: 'Too many requests from this IP', }); function authenticateApiKey(req, res, next) { const authHeader = req.headers.authorization; const apiKey = authHeader?.startsWith('Bearer ') ? authHeader.slice(7) : null; if (!apiKey || !validApiKeys.includes(apiKey)) { return res.status(401).json({ error: 'Invalid or missing API key' }); } next(); } // Apply rate limiting to review endpoint app.use('/review', limiter); // Health check endpoint app.get('/health', (_, res) => { res.json({ status: 'healthy', timestamp: new Date().toISOString(), service: 'MCP GitHub Server (Hosted Mode)', }); }); // Review endpoint app.post('/review', authenticateApiKey, async (req, res) => { const { pr } = req.body; if (!pr) { return res.status(400).json({ error: 'PR URL is required' }); } try { const result = await reviewPullRequest(pr); res.json(result); } catch (error) { console.error('Review error:', error); res.status(500).json({ error: 'Failed to review PR' }); } }); // Error handling middleware app.use((error, req, res, _next) => { console.error('Server error:', error); res.status(500).json({ error: 'Internal server error' }); }); // 404 handler app.use((req, res) => { res.status(404).json({ error: 'Endpoint not found' }); }); // Start server app.listen(port, () => { console.log( `✅ MCP Server (Hosted Mode) running on http://localhost:${port}` ); console.log(`📍 Health check: http://localhost:${port}/health`); console.log(`🔍 Review endpoint: POST http://localhost:${port}/review`); console.log(`🔑 Valid API keys: ${validApiKeys.join(', ')}`); console.log(`📝 Use Bearer token authentication for /review endpoint`); });