You can create a Nintex Forms XML with an application and upload the file to a SharePoint list. The Nintex Forms On Premises 2013 SDK contains a code sample of an application that will take a stripped down XML description of a form and create a Nintex Form. In this post, I’ll walk through my steps in creating, uploading, and then binding my form input fields to a SharePoint 2013 list using the Simple Form Builder (GenerateFormXML).

For the complete post, see the Nintex Community.