An automatic shipping label generation is available in DigiFabster since January 2019.
It works as following, let's say you have ordered with selected shipping:
Click "Generate shipping label" for new order;
After some time (~30 secs usually) label and tracking links will appear.
Tracking URLs are provided by 3rd party service (EasyPost) and may look like this:
This feature may be turned on on your pricing plan for $40/month.
To enable automatic label generation for your company we'd need you to create an account on EasyPost (https://www.easypost.com/signup) and provide us with live API key from them. Billing for postage services is handled by EasyPost as well, they charge 1¢ in addition to the cost of shipment.