Soundcloud API-V2
Introduction
The Soundcloud API-v2 is an internal API used by Soundcloud. It is not intended to be used by third party apps. Even though it is against their ToS to use it. They stated on twitter that is usable in third party apps without being in fear of a ban.
The base url is:
api-v2.soundcloud.com/
But before you can use any of these endpoints you need to get a client_id otherwise none of your requests will actually get a response.