const express = require(‘express’); const bodyParser = require(‘body-parser’); const axios = require(‘axios’); const app = express(); app.use(bodyParser.json()); app.post(‘/chat’, async (req, res) => { const prompt = req.body.prompt; const response = await axios.post(‘https://api.openai.com/v1/engines/gpt-4/completions’, { prompt: prompt, max_tokens: 150, }, { headers: { ‘Authorization’: `Bearer YOUR_API_KEY` } }); res.json(response.data); }); app.listen(3000, () => { console.log(‘Server running on port 3000’); });