Yes, that's not a problem. We do not restrict the use of our API to one domain, website, or shop. However, please note that we cannot show or charge the cost of shipping labels generated for each shop separately. Therefore, you will receive an overall invoice for all online shops.
💡 Tip: When you create a shipment, you can use the reference_number parameter to give shipments from different sales channels an appropriate reference so that you can more easily identify which shop a shipment was created for.
Any further questions? We're happy to help.