REST API plays a crucial role in the OutSystems ecosystem by enabling seamless integration with numerous external systems. This integration underpins many of the available Forge components. However, developers often struggle to implement this in Service Studio due to the limited features available for visualizing API outcomes. During this session, we will demonstrate some of the less discussed aspects of REST APIs, such as integrating REST APIs using the POST method ,handling inputs with complex data types and call back actions such as OneBeforeRequest and OnAfterResponse.