Disallowed Mods

• Baritone / Fabritone
• X-ray mods / X-ray texturepacks
• Entity outliner
• Viaforge / Viafabric
• Anti ghost
• Vivecraft
• Auto fishing mods
• Swing through grass mods
• Autoclicker mods for PVP
• Quick hotbar / Inventory hot-swap / Inventory manipulation mods
• Tweakeroo
• Autoswitch
• Invisible block viewers
• Skin blinking mods
• Structure finders / Seed maps
• Scripts / Automation software
• Any auto-clicker above 1 click per second
• Modifications that make you click >20 times per second
• Minimap mods that display players/entities / underground structures
• Any mod that affects player/vehicle movement
• Mods that make the player do an action, such as mine, attack, move items, etc.

Allowed Mods

• Optifine / Optifabric
• Labymod
• Lunar client
• Badlion client 
• Sodium / Phosphor / Lithium / Starlight
• Better PVP (fair-play only)
• Durability viewer mods
• Food viewer mods
• Shulker box view mods
• Litematica (easy place may get you kicked occasionally as it does unnatural block placements)
  
  

Use non-allowed mods at your own risk.

Reading the disallowed mods list and using common sense when determining whether your mod would be allowed is a good idea.

If you get client errors when using a mod you should stop using it immediately.