# Restful API

Once you have defined a model, then you can use create, read, update, and delete (CRUD) operations to add data to the model, manipulate the data, and query it. All Hormo Studio models that are connected to persistent data stores (such as a database) automatically have the create, retrieve, update, and delete operations of the PersistedModel class

For each model we generate a lot of endpoints that you can make query for them and test your API's endpoints in our playground. Before start your restful API service you have to run project first.

![API service playground](https://blobscdn.gitbook.com/v0/b/gitbook-28427.appspot.com/o/assets%2F-LLJWqvJtjL4p5b0wMai%2F-LLYw6Zcn2Vspfw8dndy%2F-LLYwvWreT-CtYk1jJpN%2FScreen%20Shot%202018-09-04%20at%202.09.21%20PM.png?alt=media\&token=c8af076e-f412-4910-98b3-338bd7cd7db0)

Let's explore playground and learn how to works with that ;)

{% content-ref url="restful-api/playground" %}
[playground](https://docs.hormo.studio/restful-api/playground)
{% endcontent-ref %}