| 200 | 20000 | OK | Normal response |
| 200 | 20002 | Accepted | Task accepted in async / webhook mode |
| 400 | 20015 | Invalid parameter | Missing or invalid parameter, e.g., filename without extension or unsupported file type |
| 400 | 40025 | input_values is required and cannot be empty | input_values not provided when creating a task |
| 400 | 40039 | Form data missing | Web app form field missing |
| 401 | 30008 | Please login | No Authorization header provided |
| 401 | 20052 | Invalid API key | API key format or content not recognized |
| 401 | 20093 | API key expired | API key has passed its validity period |
| 401 | 20054 | API key not found | The API key in the request does not exist in the system |
| 403 | 30001 | User disabled by the system | Account banned by the platform |
| 403 | 30094 | Third-party node disabled | The third-party node has been taken offline by the platform |
| 403 | 20021 | Content contains prohibited or sensitive content | Input / output hit moderation rules |
| 403 | 30019 | This model is only accessible to identity-verified users | Calling a model that requires identity verification without completing verification |
| 402 | 20049 | Insufficient account balance | Insufficient balance when submitting a task or during billing |
| 404 | 30009 | Task not found | requestId does not exist or has been cleaned up |
| 404 | 20011 | Record not found | Generic record-not-found |
| 404 | 20224 | Web app not found | web_app_id is invalid |
| 404 | 30046 | Task output not found | The task has not produced output yet or the output has expired |
| 429 | 50600 | Too many requests | Overall request rate exceeded |
| 429 | 50601 | Per-minute request limit reached | RPM rate limit triggered |
| 429 | 30039 | Queued task limit reached | Queuing + Preparing count exceeds the plan quota |
| 429 | 30040 | Running task concurrency limit reached | Running count exceeds the plan quota |
| 429 | 59006 | Third-party API task queue limit reached | Third-party node queue limit exceeded |
| 429 | 20094 | API key quota exhausted | Call quota for this API key is used up |
| 500 | 60000 | Unknown error; request processing failed | Internal uncaught exception |
| 500 | 50502 | ComfyUI service execution failed | ComfyUI internal error |
| 500 | 50503 | Redis operation failed | Cache-layer fault; usually retryable |
| 500 | 50511 | Internal storage error | Storage-layer fault |
| 500 | 50510 | ComfyUI execution error | ComfyUI node execution error |
| 503 | 60012 | System busy; please retry later | System overload |
| 503 | 50517 | Third-party interface timeout | Third-party API did not respond within the time limit |
