Why does UPS Express Saver not appear in the 3rd Party Shipping Calculator?
UPS Express Saver is a shipping method only valid for intra-Canadian shipments where both the shipper and addressee reside in Canada. Currently, the 3rd Party Shipping Calculator only works for shipments originating in the United States. In other words, the “From” address for a shipment must be in the U.S. Since shipments originating in the U.S. cannot be sent using UPS Express Saver, that shipping option cannot be used with the shipping calculator.