Use Wordpress as CMS and access content via REST API

I have used Contentful before to host content and access it in my application via REST. It works great however it is not free.

I am trying to find out if I can host my app's content similarly on Wordpress and access it in my app using its REST apis.

Does anybody know if we can and how? It is not that straight forward to figure out on their website.

PS: I don't care about the security about the website content.