The system has added an Commerce API for working with orders and the store.

The system includes the Commerce API, which allows you to: retrieve order statistics, add, update, and delete orders, view and manage categories, producers, collections, and products. All of this is available via secure requests.
Mass addition or updating of products, categories, producers, and collections is possible, including characteristics and variants.

More details in the guide: https://hotlist.biz/en/user_guide.html#hotengine-CommerceAPI