Seller Assistant supports direct integration with prep centers. The Integrations hub includes a directory of prep centers available for connection. Once connected, warehouses sync automatically and Purchase Orders can be sent as inbound shipments directly from the Purchase order view.
Connecting Prep Center
Open Integrations page in Platform section.
Find Prep centers section shows all available providers.
Click on a provider card to open the detail page, then click Connect.
Enter the Merchant ID and API Token.
On successful validation, warehouses sync automatically and appear in the Warehouses table with a synced badge.
If your prep center is not in the directory, use the "Request your prep integration" card to submit a request via the Seller Assistant feedback roadmap.
Sending Purchase Orders to Prep
Sending to prep – open a PO assigned to a synced warehouse. A "Send to prep" button appears in the PO header. Clicking it opens a confirmation dialog with an editable shipment name. After sending, the PO header shows shipment status and a direct link to the shipment in the prep center portal.
Changing the warehouse – the warehouse field in the PO header is now an inline dropdown. Click the warehouse name to see all team warehouses with provider logos and addresses. If a shipment is already linked, the dropdown is disabled until the shipment is unlinked.
Unlinking a shipment – available via the PO's action menu. Unlinking removes the local connection between the PO and the prep center shipment. The shipment in the prep center is not deleted. After unlinking, "Send to prep" reappears and a new shipment can be created.
Note
PO items without a resolvable SKU are skipped during shipment creation without a warning. If all items are missing SKUs, an empty shipment is created.