Cloud API - is there a way to upload PDF docs?

Or do we have to edit on HTML?

@Michael_Dewing

Thanks for your inquiry. You can upload and sign supported file formats with next Generation GroupDocs.Siganture for Cloud API. You may upload PDF document to cloud storage using GroupDocs.Storage for Cloud API or dashboard UI. Hopefully it will help you to accomplish the task. However, if there is any difference in your requirements and our understanding then please share some more details, so we will guide you accordingly.