Any discounts for an order are held in the Discount Item table in the Omnitron.
In the api/v1/discount_items/detailed_integration/?order={order_id} response, discount_items, that is, the discounted items, are shown in the result list.
If it is desired to return details for a single item in the result list, a request can be sent to /api/v1/discount_items/{discountitem_id}/detailed_integration. The response from this endpoint will show the details of the discount item id instead of {discountitem_id}.
Detailed information about the order discount is shown in the table below.