I guess I would ask you, what happened when you tried that?
Speaking generally, a REST service is “just” a set of URL endpoints. They’re designed to be used by other code, but there’s nothing stopping you from accessing them in your browser.
For example, here is a simple endpoint that I use:
https://happycoding.io/api/site.json
That URL is used by JavaScript to get data about the site, but you can also visit it in your web browser.
I wrote more about this here: