From OpenHome

Qobuz's developer API is published on github.

The Credentials service can be used to retrieve the following information:

• The Ids state variable includes qobuz.com if Qobuz is supported.
• Data from Get contains the app_id used by many Qobuz API calls.
• Status from Get is blank if Username and Password are both either blank or set and valid. If Status is not blank, it contains either json returned from a Qobuz API or an error string.
• The token returned from Login and ReLogin is a Qobuz user_auth_token.

Some Qobuz APIs require an app_secret argument. These APIs should not need to be called from control points.

Tracks can be added to the Playlist service with urls in the form
qobuz://track?version=2&trackId=[insert_qobuz_track_id]