| 400 | invalid_request | The body failed validation, or strict: true met a parameter the provider cannot honour. detail lists the issues. |
| 401 | unauthorized | Missing, malformed, or revoked API key. |
| 402 | insufficient_credits | Your balance is at or below zero. Nothing was charged. Top up in the dashboard. |
| 404 | not_found | Unknown route, or a job id that does not exist or belongs to another account. |
| 500 | internal_error | A bug on Helve’s side. It is reported automatically; retry once, and include the request path when writing to support. |
| 501 | provider_not_available | The provider does not offer this tool, for example a search-only engine on Extract. |
| 502 | provider_error | The provider returned an error. detail carries its response body verbatim. With fusion, every member failed. |
| 503 | provider_not_configured | The named provider has no key on this deployment, or transcription’s durable execution is unavailable. |