anti-xray
There are 3 repositories under anti-xray topic.
the-glitch-network/plymouth-fabric
An anti-xray engine & locking system for Minecraft.
Animationking11/X-RayAlerts
A plugin for detecting X-Ray on minecraft servers.
MakerTim/FullRay
An anti xRay solution for Bukkit 1.8 - 1.11