EAN numbers are not always mandatory, but for marketplaces they come in especially handy. Most of the marketplaces require an EAN, as they match product information based on this code. Nowadays even comparison websites are making it mandatory (e.g. Google) to provide valid EAN codes. So, it’s wiser to be prepared by getting EANs. These could be delivered by the manufacturer or you could buy them yourself.
Do you want to interactively learn all basics related to the creation of an API export in Channable? Learn how to create a Channacademy account in the Channable app through this Help Center article and start with the Basic APIs course.