I recently installed the mopidy audio player on my raspberry pi to stream music in my livingroom. After installing it it was not immediately clear to me how I could access the installed web client. The example configuration did show an example mpd section with a network config. But that did not make the web interface available at port 6680. It turns out that the http interface has a different config. This is explained in the docs but I did not get that far after the getting started guide. The example below makes mpd listen on all interfaces.

[http]
hostname = ::

Please note that this will make the HTTP server available to every node on the network. This HTTP endpoint will be available without any security protections.