Well, it depends on the format in which your REST API sends its responses. For instance, if you follow the quick start
here, you will get a response from the server similar to:
You can create a very simple JavaScript client that displays the content, and adds a navigation bar that contains a home button that links to the root page, a refresh button that links to the "self" url, and additional buttons for any other links that may appear in the "_links" property.