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# Webhooks

When you successfully submit a [POST job](/en/docs/model-derivative/v2/reference/http/job-POST) request to APS, the Model Derivative service initiates a translation job. Depending on the complexity and size of the model, it may take a while for the job to finish. Rather than periodically check if the translation job is done, you can use a webhook to be notified when the job is done.

The following table lists the webhook events supported by the Model Derivative service:

| System       | Event                                                                                                      | Description                |
| ------------ | ---------------------------------------------------------------------------------------------------------- | -------------------------- |
| `derivative` | [extraction.finished](/en/docs/webhooks/v1/reference/callback/model_derivative_events/extraction.finished) | When a job is completed.   |
| `derivative` | [extraction.updated](/en/docs/webhooks/v1/reference/callback/model_derivative_events/extraction.updated)   | When a job is in progress. |

See the [Webhooks How-to Guide](/en/docs/webhooks/v1/how-to-guide/create-a-hook-model-derivative/) for a walkthrough that explains how to create a Webhook for Model Derivative events.