​
Common error format

Errors proxied from REST follow the same format as in the REST docs: 
{
  "statusCode": 401,
  "message": "API key is required. Please provide a valid V2 API key in the X-API-Key header.",
  "error": "Unauthorized",
  "timestamp": "2024-01-15T10:30:00.123Z",
  "path": "/api/v2/news"
}

​
Frequent issues

  • Missing BYUL_API_KEY environment variable → set the environment variable before launching
  • Rate limit exceeded → apply backoff/retry per REST guidance

​
Retry guidance

Apply exponential backoff for 429 and 5xx responses. You can reuse the REST examples as-is.