Square Amazon Integration

Nventory syncs both. For FBA, it reads your warehouse-level inventory from Amazon so you can see total available stock. For FBM, it actively syncs quantities from your Square locations and routes FBM orders to your store for fulfillment.

Nventory pushes the inventory feed to Amazon within seconds of the Square transaction. Amazon's own feed processing typically reflects the change within a few minutes, which is the fastest their API allows.

During initial sync, Nventory can set conservative inventory buffers on Amazon to prevent any listing-level stockouts while the system calibrates. Once sync is validated, you can open up full availability.

Yes. Nventory lets you reserve a minimum quantity for either channel. For example, you can hold five units for walk-in customers while listing the rest on Amazon, or vice versa.

Nventory aggregates available stock from every Square register location you designate and pushes a combined quantity to your Amazon FBM listings. Each Square location maintains its own count, and Nventory recalculates the Amazon feed in real time whenever a register sale, return, or stock adjustment occurs at any location.

Yes. Every transaction completed at your Square register, including cash drawer sales, barcode-scanned items, and tap-to-pay purchases, triggers an immediate inventory adjustment on Amazon through Nventory. This closes the oversell window so customers browsing your Amazon listing never purchase an item that was just sold at the counter.

First, check whether Nventory is aggregating stock from all relevant Square locations — if a location is excluded, its counts won't factor into the Amazon feed and you'll see phantom shortages. Next, verify how FBA and MFN quantities are allocated, since FBA stock managed by Amazon warehouses should not be double-counted with your Square on-hand totals. Finally, review your sync frequency settings in Nventory; batch intervals longer than real-time can allow drift during high-volume sales periods.