Drupal's default way of providing a content API. It's very flexible and let's applications query whatever they need from the back end. Recommended Yes Core module Module page https://www.drupal.org/docs/core-modules-and-themes/core-modules/jsonapi-module Module tags #Extension Tags #Headless Articles Headless Drupal #Headless [Article] Headless Drupal [Resource] Drupal 8 mobile app [Article] Drupal vs React [Module] JSON API