Through the scripting and trigger features you can add a simple scrobbler to myMPD.

An example script is in the contrib/scripts directory named ListenBrainz-Scrobbler.lua

After copy & paste the file content in a new script (ommit the first comment line) you must add your ListenBraniz token (token = "<musicbrainz token>").

To automatically call this script add trigger to the event Scrobble with this script as action.

You should enable the listenbrainz related tags in mpd and myMPD to scrobble MBIDs.