Translate files to OBJ

This blog outlines two methods for translating models to OBJ format: direct and indirect translation. Direct translation is possible for certain file formats, listed on the Supported Translations page. An unsuccessful attempt will yield a 400/Bad Request error. Indirect translation involves translating the file to SVF first, then using parameters modelGuid and objectIds, as noted for geometry extraction. The blog provides a tutorial link for detailed guidance on the two-step process. APIs mentioned include Model Derivative and OBJ translation resources.
You can find additional details in this blog