I'm still waiting to see if there's any more interest in this from Customily Devs and advanced users. An API for creating templates/editing templates programmatically, would be incredibly useful for mass automated products publishing.

Even if we needed to create a template manually first but programmatically clone it and edit elements to then further link to a listing in an automated way that would be a huge thing for us right now.

I'd love this API too. It will allow for Bulk Templates generation programmatically.