Wix Amazon integration that keeps one stock count

Wix reports a sale the moment it happens and Amazon does the same for orders you ship yourself, so neither side waits on a clock. Writing the new count back is where they differ: Wix takes it within seconds, and Amazon takes a second or two because stock updates go in as a submitted feed we wait to see accepted.

For a shelf shared between a website and a marketplace, that is comfortably inside the window that matters. Nothing here needs safety stock the way a polled channel does.

Amazon’s seller SKU stops at 20 characters against Wix’s 40, so Amazon decides the shared code. Settle that before the first match and nothing lands in the unmatched list.

We always send your count to Amazon, but we only read changes back for items you ship yourself: anything Amazon stores and ships keeps the count Amazon maintains. And because Wix mirrors a master store, product edits belong in the master rather than on Wix, which overwrites them on the next sync.