The fundamental purpose of Rest-APIs is providing a grouped specific rich resource that provides the output required.
Rest Application Programming Interface uses four methods to communicate with objects which are GET | POST | PUT | DELETE The majority of API's use JavaScript Object Notation, dialectally known as JSON, these objects collect then communicates with data (GE, POST, PUT, DELETE).
The data within a JSON can be number, string, boolean, null values, or an ordered list of values, or unordered set of key value pairs.
Single values is termed Scalar data types
A list of values is termed an Array
Unordered set of keys, value pairs, attributes (Not XML attributes) are termed Objects