As previously announced on this page. on monday may 31 between 05:00 and 06:30 there will be downtime on our Retailer API Order and Return endpoints. During this downtime, it is not possible to confirm or cancel orders. Also, it is not possible to retrieve FBB orders/shipments. However, it’s still possible to retrieve FBR orders/shipments.
Regarding the Return endpoint, all the functionalities are down during this period. This means you can not create, confirm or receive returns.