Alright, seems to just be an issue with your config, mind sending me that?
I checked it over and it was a double bracket haha You should ask people to check carefully before asking to send over to save you the hassle haha
cheers 
hey, is there anything special i need to do to get it working with luckperms and nucleus? Screenshot - b7f0170cfcf32b484f9302437f7f5199 - Gyazo loaded it into a test server to check it out and mess with it but noticed its not changing the prefix.
It works perfectly for me, However there has always been a slight delay between when you set it and when nucleus picks it up as a new prefix.
Also make sure that " /lp user ### meta info " shows that the prefix is set at the top with 110 priority.
Will this get updated for API 7? 
here you go
In our continuing effort to phase out the Plugin Releases category, this thread is being locked because the plugin is already listed on Ore.
Check it out: leelawd93 / MMCPrefix