Hey, I love this mod and my friends and I consider it to be essential! However, we play on a Spigot-based server and recently we noticed that ender chest previews were added (whilst doing redstone in singleplayer). Is there a plugin that is being developed that adds server integration onto Spigot/Bukkit based servers? Thanks!

If you have a diff file, I'd be happy to add it as a patch to my own server software too, let me know which method works best for you :D

Any updates on this? I can't preview my ender chest on my server

There is currently no shulker box tooltip plugin in the works as I am not familiar with server-side plugin development.
The mod only talks to the server for ender chest data so this a plugin should not be hard to implement, I look into creating that in the future.

Sounds good! Thanks so much!