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 


https://submit.activedemand.com/submit/ecommerce?provider=shopify&endpoint=orderpayment



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.