For a long time, REST was the de facto way to design APIs. Then in 2015, Facebook open-sourced GraphQL and marketed it as a hot new alternative to REST.

Developed by Facebook in 2012, GraphQL allows client services to request precisely the data they need from a server, making it more efficient and flexible compared with REST APIs.

Apollo GraphQL has announced a public preview of Apollo Connectors, which enables developers to turn a REST API into a GraphQL endpoint.