Configuring JSON:API Features
The JSON:API module comes with Drupal core out of the box. It exposes entities as a JSON:API-specification-compliant web API.
Varbase API module assembles a better JSON:API starter kit implementation. With authentication and authorization. Allows for easy ingestion of content by other applications.
Varbase APIA Specification for Building APIs in JSON
If you’ve ever argued with your team about the way your JSON responses should be formatted, JSON:API can be your anti-bikeshedding tool.
Read more at: https://jsonapi.org
Drupal Core JSON:API Module
The JSON:API module is a Drupal-centric implementation of the JSON:API specification. By its own definition, the JSON:API specification "is a specification for how a client should request that resources be fetched or modified, and how a server should respond to those requests.
Designed to minimize both the number of requests and the amount of data transmitted between clients and servers. This efficiency is achieved without compromising readability, flexibility, or discoverability.