Hi @cbolles! A custom handler may be required for custom tasks, including custom pre- & post-processing. We have additional details on creating and adding a custom handler to your model to use with Inference Endpoints here: Create custom Inference Handler.
I wanted to mention our Inference Endpoints catalog of ready-to-deploy models that require no additional customization, and deployment is verified by Hugging Face: Inference Catalog | Inference Endpoints by Hugging Face.
Hope this helps and let us know if you have other questions!