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GraphQL is a server-side runtime and query language for API technology where it allows you to write queries that define the existing data. GraphQL provides a complete and understandable description of the data in the API. It is a powerful developer tool designed for flexibility. GraphQL is a better choice to design a discoverable API.

Following are some reasons why you might choose GraphQL as the foundation for your project.

Reason 1: GraphQL ecosystem provides maximum flexibility when it comes to making data easily available for customers and internal users. It means that, no matter how many databases, services, legacy systems, and third party apps you use, GraphQL will overcome all the complexities and provide a single endpoint. Its flexibility will help your organization with multiple teams and systems by making the data easily available through one unified API.

Reason 2: GraphQL helps the developer by fetching only the required data by the clients. No more over-fetching or under-fetching. Over-fetching means the query provides everything, even the data not required not required by a client which impacts performance of the App and uses more bandwidth. Under-fetching means the system provides inadequate data which is not helpful either.

Reason 3: GraphQL comes with powerful tools such as GraphiQL, GraphQL Playground that provides a rich experience that allows developers to inspect and try out new API with minimal effort. GraphQL code generator tool can speed up development of the project.

Reason 4: GraphQL APIs are built around a type system. This type system, or schema, is used to validate queries. These queries are used to generate documents and code which is used to integrate the API on the client-side. This results in a well-documented API using GraphQL in minimal time providing transparency and smooth development.

Reason 5: REST API doesn’t support backward compatibility. In this case, A GraphQL server can act as a middleware between the old REST API and new applications. As you update clients’ existing REST API, you can also update them to work with your new GraphQL API. Once no clients are using REST endpoints then you can replace all REST APIs with GraphQL.