What characterizes a RESTful API?

A RESTful API is characterized primarily by its statelessness and the use of standard HTTP methods. Statelessness means that each request from a client to the server must contain all the information the server needs to fulfill that request. This design principle allows RESTful APIs to be scalable and simplifies the server’s implementation since it does not need to retain session information between requests.

The use of standard HTTP methods—such as GET, POST, PUT, and DELETE—further defines the operations that can be performed on the resources identified by URIs (Uniform Resource Identifiers). Each method corresponds to specific CRUD (Create, Read, Update, Delete) operations on data. This approach promotes a uniform interface that simplifies communication between clients and servers.

In contrast, options that emphasize a high level of state management, restrictions to local applications, or a lack of utilization of URIs do not align with the principles of REST. Effective use of standard protocols and resource addressing through URIs are fundamental aspects of building a RESTful service, enabling interoperability across different systems and applications.