post https://api.helloextend.com/line-items/shipments
This endpoint allows a shipment to be added to an existing order by using the Extend Line Item ID or Line Item Transaction ID (the merchant’s unique identifier for the order line item).
Shipment information is only required when creating an order for shipping protection contracts. Shipments will typically need to be added to an order if a product or list of products were not included with the original shipment provided on the order.