The present disclosure provides a computerized method for package management, including: storing, in a data structure, information of a seller in association with a plurality of items sold by the seller; receiving an indication of a transaction, the transaction indication including an address of a customer and at least one item identifier corresponding to an item sold by the seller; converting the transaction indication into a shipment request by formatting the transaction indication according to a standardized format required by a shipper; generating a message containing the formatted shipment request; transmitting the message to the shipper in real time to initialize shipment of the item; and providing real time confirmation to the seller and the customer that shipment has been initialized.