Okay, so first thing with an API call inside React is that the basic way is to add it to the componentDidMount method. Now you can’t do that in edit setting without creating your own custom component.
However here is an example of how to add a basic API call in React
https://github.com/zgordon/react-book/blob/master/9-component-lifecycle/completed/src/Practice2.js
Let me know if that helps get you there