YARC (Yet Another REST Client) is an easy-to-use REST Client. Use it to develop, test and debug RESTful APIs. Save favorite requests (including headers, payload etc.) and re-use them with the click of a button. Import/Export favorites. Your favorites are automatically synced with your Google account and are not tied to a single machine. View and re-run all your previous requests and responses.
I use it with Vivaldi, and it's pretty cool.