Which SAP interfaces do you use for shop integration?

For SAP Business One, we primarily use the Service Layer (REST API) for master data and transactions, supplemented with DI API calls for complex business logic. For SAP S/4HANA, we use OData V4 Services and CDS Views for read access, plus RFC/BAPI interfaces for transactional processes like order creation and pricing. The optimal integration path depends on your specific SAP configuration.