I made a tool with AI to grab all unmapped listens from Spotify and added shortcuts to search in MusicBrainz, open in Spotify, and submit the missing data via Harmony. It also allows you to submit a recording to match the unmapped listens.
Check it out:
And the code is here:
It remembers the API Token and Number of Recent Listens, but it would be nice if it also remembered ListenBrainz Username
Done.
Will now load the last username used.
You might also want to have a look at SAMBL which is being worked on, unless I misunderstood the goal of the your tool
I use SAMBL daily 
This is something else, this tool helps me find my listenbrainz listens (or any other user who uses spotify) that are not mapped and easily import them into MB.
I see, I see!
Thanks I will check it out
