Notion is used as a CMS via Super.so, Potion or Feather; its API creates pages in a database.
How Sorank connects: via Make.com (webhook bridge). Notion 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 Notion using a dedicated Make.com app. Sorank has no native Notion connector, but the webhook plus Make route automates publishing end to end.
Public API: Yes · Dedicated Make.com app: Yes · Create-blog-post endpoint: Yes · API docs: https://developers.notion.com/reference/post-page