X-RateLimit-Limit: 1000
X-RateLimit-Remaining: 995
X-RateLimit-Reset: 1698345600

{
  "error": {
    "code": "rate_limit_exceeded",
    "message": "Too many requests. Please try again in 30 seconds."
  }
}

HTTP/1.1 429 Too Many Requests
Retry-After: 30

async function makeRequestWithRetry(url, options, maxRetries = 3) {
  for (let i = 0; i < maxRetries; i++) {
    const response = await fetch(url, options);

    if (response.status === 429) {
      const retryAfter = response.headers.get('Retry-After') || (2 ** i);
      await new Promise(resolve => setTimeout(resolve, retryAfter * 1000));
      continue;
    }

    return response;
  }

  throw new Error('Max retries exceeded');
}

// Polling every second
setInterval(async () => {
  const order = await getOrder(orderId);
}, 1000);

// Use webhooks
app.post('/webhooks/gale', (req, res) => {
  if (req.body.type === 'order.created') {
    handleOrder(req.body.data);
  }
});

// Instead of multiple requests
for (const product of products) {
  await checkEligibility(product); // 100 requests
}

// Use batch endpoint
await batchCheckEligibility(products); // 1 request

const cache = new Map();

async function getProductEligibility(productId) {
  if (cache.has(productId)) {
    return cache.get(productId);
  }

  const result = await checkEligibility(productId);
  cache.set(productId, result);
  return result;
}