API to manage intents and entities

Hi, I just started evaluating Rasa to build an assistant and I have been able to write a first project that connects to my application using a custom channel. It also includes a custom action that performs queries on a database.

Now, I would like to check if it is possible implement a UI to let a user define intents and entities. Are there any endpoints to create/inject new intents or entities?

Apparently some deprecated projects based on old versions of Rasa, like RasaUI or Botfront, had that ability.

Any thoughts on where to start with the current API?