The ccHost Query API is an open, publicly available interface that is available for public use, especially by 3rd party websites, mobile applications (such this MP3 Music Downloader application), smart TV appliances and any other network connected device.
And If you don't believe in use and you are thinking what we download licensed music, you can contact to ccmixter support and ask him.
We hope that you will love our MP3 Music Downloader. Because it is a fre music from people to another people. Enjoy!