As requested by a few of the users, this plugin now supports heads from minecraft-heads.com

IMPORTANT: Searching through this database is very slow! While it doesn't impact the performance of the server itself, it can take between 1 and 3 seconds per head to load. This means that trying to load 50 heads can take over 2.5 minutes! (for this reason a progress message was added for manual search). This is a limitation on the side of the database, not on the side of the plugin, so I have no control over this. While the search is in progress, you can still do everything in minecraft and it shouldn't cause any disconnects.

Users:
As an example, if you want to search for 'doge', in the minecraft-heads.com database, you can use the following command:

Server owners:
You can add a custom categories that use minecraft-heads.com in the following way to categories.yml of HeadsPluginAPI: