How do I wire a Heureka.cz price-comparison feed from Magento?

Heureka.cz is the dominant price-comparison engine in Czechia + Slovakia. Most CZ shoppers price-check via Heureka before buying, if you’re not on the Heureka feed, you don’t exist. The integration has two parts:

1. Product feed, Heureka’s XML schema (categories, EAN, price, stock, delivery time, parameters). We generate it from Magento via a cron-driven export to pub/media/heureka/heureka.xml. Heureka pulls it every 6-24 hours. Category mapping (Magento category ↔ Heureka category-tree node) is the trickiest part, we maintain a stored map per project.
2. Ověřeno zákazníky pixel, Heureka’s post-purchase review pixel. Drops on the order-success page, sends customer email + order ID. Heureka emails the customer 10 days later for a review. Required to display the “Ověřeno zákazníky” badge, a major trust signal on PDPs.

We also ship the Heureka.sk variant for Slovak stores (same XML schema, different category tree). Total integration effort: 8-16 hours, depending on catalogue complexity.