Coupang is South Korea's largest online marketplace, and selling there means working with the Coupang Wing seller portal and the Coupang OpenAPI — a vendor-key/secret signed REST interface with its own category taxonomy, mandatory attribute rules, and a structured order/shipment lifecycle. Magento Open Source and Adobe Commerce have no native Coupang connector, so without integration every listing, stock update, and order is re-keyed by hand across two systems.

This is a build-to-order extension. ECOSIRE designs, develops, installs, and supports a dedicated module (Ecosire_CoupangIntegration under app/code) on your own Magento 2 install — Open Source or Adobe Commerce. It is not an instant Adobe Commerce Marketplace download; we build it against your catalog, attribute set, and Coupang vendor account, then hand over a tested, documented system.

The module is engineered the Magento way: an admin configuration section (System > Configuration) with encrypted credential storage and ACL resources, service contracts wrapping the Coupang OpenAPI with HMAC request signing, cron groups for scheduled inventory and order polling, observers on catalog_product_save_after for near-real-time stock pushes, and plugins/interceptors where core behaviour must be extended cleanly. Bulk operations run through Magento's message queue so large catalogs don't time out.

You get bulk product upload with reusable category and attribute mapping profiles, scheduled inventory sync that respects MSI source quantities, order import that creates native Magento orders, and shipment automation that pushes tracking and invoice numbers back to Coupang. Where you already run ShipStation, Linnworks, or similar tools, we wire shipment and fulfilment data through them rather than around them. Everything is logged, retry-safe, and visible in an admin grid so you can audit every sync.