400 | Invalid request | Correct the request using the endpoint reference |
401 | Authentication failed | Verify the key with whoami |
402 | Public API subscription access is unavailable | Check Subscription |
403 | Access denied | Check the key’s scope and use a server-side request |
404 | Entity or endpoint not found | Check the ID, workspace, method, and path |
409 | A conflict prevents the change | Follow the error message before retrying |
413 | Request body exceeds the endpoint limit | Reduce the payload |
422 | Supported limits exceeded | Follow the endpoint’s limits or simplify the request |
429 | Too many requests or an event query is too broad | Back off or narrow the query, depending on the error code |
500 or 503 | The service is temporarily unavailable | Retry a read with backoff and keep diagnostic context |