In May 2017, Manton Reece and Brent Simmons introduced JSON Feed:
JSON has become the developers’ choice for APIs, and that developers will often go out of their way to avoid XML. JSON is simpler to read and write, and it’s less prone to bugs.
So we developed JSON Feed, a format similar to RSS and Atom but in JSON. It reflects the lessons learned from our years of work reading and publishing feeds.
JSON Feed & Drupal
JSON Feed generated a lot of immediate interest and discussion so it seemed like an inevitability that there should and would be a module that enabled JSON Feed support for Drupal. After a few weeks of work and testing, the JSON Feed module now has an official release. Version 1.0 allows Drupal users to add a JSON Feed display to any view and map Drupal fields to the attributes defined by the JSON Feed specification.
Special thanks to KarlShea for his generous collaboration on the JSON Feed module.