How to sync a wholesaler's API with WooCommerce without overselling or crashes

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A development team built a one-way inventory sync system for an automotive-parts WooCommerce store that draws live catalog, stock, and pricing data from a wholesaler's REST API. The core design principle treats WooCommerce as a read cache rather than the source of truth, with the supplier's data driving all product information automatically. To prevent overselling, any item marked unavailable by the supplier is immediately hidden or set to out-of-stock in the store, making it impossible for customers to purchase unfulfillable orders. Margin logic sits above the raw supplier pricing, allowing store owners to set profitability rules rather than manually editing thousands of prices. Performance was maintained by splitting sync cadences — running stock and price updates frequently while scheduling full catalog refreshes less often, and using real cron jobs with batched processing instead of WordPress page-load triggers.

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