// Using fetch (native JavaScript)
const response = await fetch('https://api.deepseek.com/chat/completions', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Authorization': 'Bearer <DeepSeek API Key>'
  },
  body: JSON.stringify({
    model: 'deepseek-chat',
    messages: [
      { role: 'system', content: 'You are a helpful assistant.' },
      { role: 'user', content: 'Hello!' }
    ],
    stream: false
  })
});

const data = await response.json();
console.log(data);