runescape-api is an open-source wrapper, written in Node.js, that allows interaction with the various APIs available for the popular MMORPG RuneScape.
Requests are made using the Got library and will not work in a browser. This was a conscious decision resulting from the limitation that the APIs Jagex expose do not allow CORS so browsers would just block the request. You'd need to use a server as a proxy still.
The implementation offers functionality to interact with the following: