Not the real server though, but the test server of https://test.mucklet.com !
I’ve tried to take counter-measures against malicious attacks. But I can only guard against attacks I can device myself. That is why I need more help.
About test.mucklet.com
The test realm is a mirror of Wolfery.com that will be reset with regular intervals…
- The test server is a replica of Wolfery, including login accounts.
- The test realm live-resets to the latest backup of the Wolfery realm each day at 00:15 CET.
- To persist anything in the test realm, you must create it in the Wolfery realm and wait for the reset
- The API is available at:
wss://api.test.mucklet.com. See this post for tips on bot coding. - More info about the API can be found by asking Accipiter.
Disruption
Can you successfully spam a room, a character, a mail inbox, etc., so much that the game becomes utterly unplayable for others? Lovely! 
(Extra bonus points for disrupting a moderator enough to make them struggle to suspend you.)
DOS attacks
Can you come up with a way to make the test server unresponsive by overloading it with some heavy-to-process requests from a single computer? Wonderful! 
Information leak
Can you find ways to figure out what characters belong to the same player? Terrific! 
Abuse of power
Can you, as a moderator, abuse your power to get information about other players, to rid yourself of fellow moderators, promote yourself to admin, and take over the realm? Awesome! 
(Ask Accipiter in-game to promote you to moderator on the test server)
Server crash
Great honor for anyone able to crash the server all together! 
And, you may come up with more fun things to try out.
Good luck on your mayhem!
/Accipiter