What are the three layers of API-led connectivity?

The three layers of API-led connectivity are correctly identified as Experience API, Process API, and System API. This framework is designed to offer a structured approach to building and managing APIs in a way that facilitates the integration of different systems and services, while also enhancing the overall user experience and business agility.

At the top layer, the Experience API is focused on providing customized and tailored experiences for specific user interfaces or applications. It fetches relevant data from the underlying layers to present it in a user-friendly format, thus directly addressing user needs.

The middle layer, Process API, acts as the orchestration layer, responsible for connecting various System APIs. It encapsulates business logic by composing and coordinating data from the multiple underlying systems, allowing for complex business processes to be defined and reused.

At the bottom layer, the System API manages access to core systems and data sources. It abstracts the complexities of operations, offering a simplified interface for the upper layers to interact with different systems, such as databases or third-party services.

Together, these three layers promote reusability, efficiency, and agility in API development within an organization, facilitating a modular approach to integration. This model contrasts with the other provided options which do not correctly reflect these established layers specific to API-led connectivity.