The microservices architecture is the prime architectural pattern and style for producing multifaceted and enterprise-scale applications to be elegantly hosted and run on cloud environments (local and remote). Microservices are lightweight, simple to build and deploy, self-defined, fine-grained, and network accessible. They also follow the single functionality principle.

Nowadays, everything that communicates over HTTP and uses JSON- or XML-formatted messages or the HTTP methods (GET, POST, PUT, or DELETE) gets called a RESTful API. RESTful APIs are easy to design and build. The seamless and spontaneous combination of microservices and RESTful APIs opens up fresh possibilities and opportunities. Hence, designing high-quality RESTful APIs acquires special significance in our increasingly connected and services-oriented world. This chapter provided the relevant patterns, best practices, and general guidelines to come up with top-quality RESTful APIs.