GraphQL

GraphQL is an open-source query language for APIs that provides a more efficient, powerful and flexible alternative to RESTful APIs by allowing clients to specify exactly what data they need from the server instead of relying on the server to determine what data to send back. It provides a strongly typed schema that defines the types of queries that can be executed against it and their expected results. You can use it to build custom APIs easily with built-in support for popular technologies such as Node.js or Java out-of-the-box.