Description: The API Mode is a specific configuration within the Ruby on Rails framework that allows developers to create applications designed exclusively to serve as application programming interfaces (APIs). Unlike traditional Rails applications, which include both server logic and views and assets for user interface presentation, API Mode omits these visual elements. This means it focuses solely on creating endpoints that return data in formats like JSON or XML, facilitating interaction with other systems and applications. This configuration is particularly useful for developing mobile applications, microservices, and any system that requires efficient communication between client and server. By using API Mode, developers can leverage Rails’ robust features, such as route management, data validation, and authentication, while optimizing performance by eliminating the overhead of views. In summary, Ruby on Rails’ API Mode is a powerful tool that enables developers to build efficient and scalable backend applications, focusing on data delivery and business logic without the need to worry about visual presentation.