ActiveDEMAND will accept a callback from Shopify during an order completion etc. To do this, you will need to add an ‘Order Payment’ JSON webhook in shopify with a URL of

Then in ActiveDEMAND, you need to add the application (Administration->Account Settings->3rd Party Applications). You will need to add the token from Shopify into the add application field

This will register an e-Commerce completion history item on the contact timeline.