GraphQL is a new approach to serving data. Some people even define GraphQL as REST 2.0. In this chapter, we will take a look at the differences and similarities between GraphQL and REST. You will also learn how to add support for GraphQL to your existing RESTful API. With some examples of querying data, as well as validating and executing a query, you will learn how to benefit the most from using GraphQL with your RESTful APIs.

The following topics will be covered in this chapter:

• Introduction to GraphQL
• Adding support for GraphQL to your REST API
• Queries
• Schemas and types
• Execution