A third party item listing management system usable for verification of third party items to be included on a retailer website includes an application programming interface and an item verification pipeline. The application programming interface is accessible by a plurality of third parties and is configured to receive item data associated with one or more items. The item verification pipeline is configured to receive the item data and call an item validation pipeline, the item validation pipeline includes a plurality of item validation stages including a field verification. At the field verification stage, data is extracted from at least one of an item image or text associated with the item. The data extracted is compared to item data obtained from an independent verification source to confirm the accuracy of the item data provided by the third party.