This appendix is a modest collection of APIs implemented by popular platforms such as GitHub, Facebook, and Twitter and the approaches they have taken to handle the various REST patterns. Though there are a myriad of possibilities for what a user can do with the data from the REST API, the commonality between the frameworks is the usage of REST and JSON. The REST APIs from these platforms are consumed by web and mobile clients. This appendix covered how these platforms handle versioning, verbs, error handling, and authenticating and authorizing the requests based on OAuth 2.0.

This book started off with the basics of REST and how to build your own RESTful services. Since then, we covered various topics as well as tips, and best practices for building scalable and highly performant REST services. We have also referred to various libraries and tools to improve testing and documentation of REST services along with emerging standards for real-time APIs. We also covered case studies with WebSockets, WebHooks, and the future of REST.

We hope this humble attempt from our end helps you understand, learn, design, and develop better REST APIs in the future.