Caution
As of July 31st, 2026 it's no longer useful to claim every key individually from a bundle. More information can be found on the official website.
Userscript that automatizes the claim of all games purchased through a bundle on Itch.io
The Itch.io folks don't really like these kinds of things as they get flooded with data but people are going to do it either way so I thought I'd publish a more efficient script than the ones I found online. For the CS folks: the games are claimed in linear time
This userscript is not compatible with Greasemonkey as the GM API changed and Tampermonkey still hasn't updated. To fix this incompatibility you need to change all instances of GM functions from GM_* to GM.*
To use this script you need to install a userscript extension on your browser, I only tested it with Edge Chromium as per my needs. Just add the script, enable it and load the bundle's page. It will take care of everything