What type of data source should be built to import data directly from a source system through an API interface?

To import data directly from a source system through an API interface, building a connector is essential. Connectors are specifically designed for integrating different systems and enabling seamless data exchange without the need for manual interventions or intermediate file formats. They facilitate direct communication with source systems, ensuring real-time data retrieval and management.

In this context, using a connector allows for a more efficient and effective data integration process. It supports various functionalities such as authentication, data transformation, and error handling, which are critical when dealing with live data feeds from an API. This approach not only saves time but also enhances the accuracy and reliability of the data being imported.

Other data source options like fixed files, delimited files, and data management export sequences are more suited for static data or data that is not actively changing as they rely on pre-defined formats and structures. While they have their respective uses in data management, they do not support the dynamic and real-time capabilities that a connector offers through an API interface. Therefore, for the purpose of directly importing data from a source system via an API, a connector is the ideal choice.