I decided to make a random url redirector to have a small project to test my php script as CGI.
The script uses the site list from gemini.bortzmeyer.org, for now this is downloaded manually, so it does not update often. The list currently has 2340 including a few onion links that may not work on most clients.
To get a random url, go to this url, you might even be able to bookmark it if your client supports bookmarking the target link (I am trying to find the function in Lagrange)