Acquia (Drupal Cloud) is managed Drupal hosting; it uses Drupal's native JSON:API to create articles.
How Sorank connects: via Make.com (webhook bridge). Acquia (Drupal Cloud) exposes an API with an endpoint to create blog posts, so each article Sorank generates is sent to a Make.com scenario through a webhook, and Make publishes it to Acquia (Drupal Cloud) using Make.com's generic HTTP module. Sorank has no native Acquia (Drupal Cloud) connector, but the webhook plus Make route automates publishing end to end.
Public API: Yes · Dedicated Make.com app: No · Create-blog-post endpoint: Yes · API docs: https://www.drupal.org/docs/core-modules-and-themes/core-modules/jsonapi-module/creating-new-resources-post