Ghost CMS is a Blogging platform (Managed and Self Hosted - its Free and Open Source - https://github.com/TryGhost)
it also used as Headless CMS
it having a Content API and Admin API
Content API - Build a Custom site or Static Site, APPS, etc using API
Admin API - Manage, Posting to our site via API
Ghost Admin API
Content API
it also having a webhook support
Test ghost site
we can install Ghost locally on our system - this may help to play the ghost API