Coming from the Destiny 2 world where an API is officially available with activity info from the live game, I wanted to build a Balatro version so that I could share runs with my friends.
The mod's source code is available at https://github.com/joshlabue/joker-report-mod
If you're just interested in seeing the site, it is at https://dev.joker.report/
Game submissions are currently in the private testing phase since the logging format is frequently changing and I don't want to make other people's uploaded games inaccessible with breaking changes.
Hoping to get the project to a general availability stage in the next few weeks, so stay tuned.