Rate Limiting

X-RateLimit-Limit: 60
X-RateLimit-Remaining: 42
X-RateLimit-Reset: 1711108920

HTTP/1.1 429 Too Many Requests
Retry-After: 18
X-RateLimit-Limit: 60
X-RateLimit-Remaining: 0
X-RateLimit-Reset: 1711108920

{
  "error": {
    "code": "RATE_LIMITED",
    "message": "Rate limit exceeded. Try again in 18 seconds.",
    "request_id": "req_abc123"
  }
}

async function apiRequest(url, options = {}) {
  const response = await fetch(url, {
    ...options,
    headers: { "X-API-Key": API_KEY, ...options.headers },
  });

  // Track remaining quota
  const remaining = parseInt(response.headers.get("X-RateLimit-Remaining") || "0");
  const resetAt = parseInt(response.headers.get("X-RateLimit-Reset") || "0");

  if (remaining < 5) {
    console.warn(`Rate limit low: ${remaining} requests remaining, resets at ${new Date(resetAt * 1000)}`);
  }

  return response;
}

async function apiRequestWithRetry(url, options = {}, maxRetries = 3) {
  for (let attempt = 0; attempt <= maxRetries; attempt++) {
    const response = await fetch(url, {
      ...options,
      headers: { "X-API-Key": API_KEY, ...options.headers },
    });

    if (response.status !== 429) return response;

    const retryAfter = parseInt(response.headers.get("Retry-After") || "60");
    console.log(`Rate limited. Retrying in ${retryAfter}s (attempt ${attempt + 1}/${maxRetries})`);
    await new Promise((r) => setTimeout(r, retryAfter * 1000));
  }

  throw new Error("Max retries exceeded due to rate limiting");
}