eMAG.hu is dominant, how deep should the integration go?

eMAG is roughly 40%+ of Hungarian online retail, if you sell physical goods in HU, you almost certainly need an eMAG channel. Integration depth depends on volume:

• Light (under 500 SKUs), XML feed + manual order fulfilment. Magento exports product/price/stock daily via cron to an eMAG-format XML the eMAG seller dashboard pulls. Orders managed in the eMAG dashboard, shipped from your warehouse, tracking pasted back. Good enough for under HUF 50M GMV on eMAG.
• Medium (500-5k SKUs), full API integration. eMAG Marketplace API (REST, OAuth2) for products, orders, stock, returns, invoices. Real-time inventory sync. Performance score monitoring. Magento ↔ eMAG bidirectional sync via a Magento module (we build custom or use a Mirakl/Channable connector).
• Heavy (5k+ SKUs or > HUF 500M GMV on eMAG), full integration plus: dynamic repricing (auto-match competitors within margin floors), Genius / FBE (Fulfilled By eMAG) integration, eMAG advertising API (sponsored products), returns automation, eMAG-specific Online Számla NAV reporting (eMAG invoices on behalf of you in some cases, but the NAV report still owes to you).

Critical: monitor your eMAG performance score daily, cancel-rate, on-time-delivery, response-time. Below 4.5/5 you get demoted in rankings; below 4.0 you get suspended. Magento dashboard + Slack alerts keep this visible.