When you have mods(Modifications) to Minecraft, are people going to know like Admins, Operators, or even other players? Will the server be able to detect them?

  • 6
    Depends on the mod. Dec 23, 2011 at 3:59
  • Depends on the mod loader. Modern version of Minecraft send the mod loader's name to the server, and Forge sends a mod list. Some hacks hide this information, but server's can detect mods that don't hide this information. Even if no information is sent, hacks can still be detected by anti-cheats. Mar 10, 2021 at 17:54

7 Answers 7


Usually, the answer would be a solid no. In almost every case, the server cannot directly detect the presence of a mod. There are some mods that are specifically made to be recognizable to the server, but those are few, and even then, they can be modified to disable said functionality.

However, this does not mean that you are safe. Though servers cannot detect mods directly, they can sometimes detect the effects of them. For example, the NoCheat Bukkit plugin will detect if a player does certain things that a player is not supposed to be able to do, like fly, run super fast, place blocks in mid air, etc. Mods like this that are "cheat" mods can in some instances be detected by the server by their effects.

On the other hand, some mods will never be able to be detected by the server. For example, minimap mods don't change gameplay, so those don't have detectable effects. In cases like that, you are completely safe.

  • What about if the mod is an inventory ORGANIZER, or Too Many Items? Dec 24, 2011 at 15:58
  • @Qwertyfizzle: First of all, depends on the mod itself. If you can give me the exact name, I can determine for sure. However, if it's just an organizer, probably not. Something like that probably could be detected, but since it's not anything major, AFAIK, there is currently no plugin to detect such a mod. Also, things like TMI don't work in multiplayer unless the server gives Permission anyway, so there's no reason it would need to be detected. Dec 25, 2011 at 4:50
  • Inventory organizers can be detected. But, in my opinion, the server shouldn't do anything, because it doesn't give you any unfair advantages, anyone can organize their inventory.
    – Bogdacutu
    Jan 6, 2012 at 13:57
  • @Qwertyfizzle But using weapon/armor auto-equip "organisation" features is considered cheating and, if noticed by other players, is grounds for banning on most PvP servers. Just so you know. Mar 25, 2013 at 2:13
  • @alexanderpas Um, [citation needed]? A little confused about what that means... how could that be detected server-side? Apr 22, 2013 at 5:22


It does not detect the mods. Some mods are client side only and will have no affect on the server. For instance most of the MiniMap mods are Client only and work fine on servers.. texture packs, etc. Mods which alter how the game works for the player though generally will not work and results can range from what Dima said, the server glitches, to just outright crashing, usually just your client instead of the server. Take the recipe mod, if you do nothing with it the game works fine, try and craft a recipe book though (which will show up as that screen is client side) and BAM, booted from the server you will be for asking it to make something that does not exist.

Hope this helps.

PS: There are a set of server/client side mods out there that can self detect each other, but you have to set up both sides for this to work. After that any supported mods can be installed just by connecting to the server to get the rest of the mods on that server.. I forget the name of it, was for Bukkit.. Leaf maybe?


Yes for some reason the servers detect the mod but you will not be able to use it if the mod is not installed on the server itself, like for example i have woodcutting mod which lets me cut down the whole tree if i only cut 1 block of it but when i get on my friends server the tree just glitches out for me because he does not have the mod but i do. The other players wont be able to detect if you have the mod unless it something that glitches everything around you.


Most mods will not be detected, but hack mods will get you banned for flying, no clip, super running, etc.

Some mods may crash your client if you play on a server.


There is a server that specifically states no flymods or xray mods, meanwhile i have that plus more, i just don't use them on servers, they're more for aid in designing adventure maps. As long as you don't fly or act suspicious (like looking down at the ground all the time, which is a dead giveaway that you're using xray) you should be fine


It's possible to detect a few mods like TMI or forcefield, but you can only use them with the servers permission so they almost never will be detected.

Mods like pixelmon, tale of kingdoms and others do crash your client when joining a regular server because they rely on missing server-side features.


They can't. Almost all servers that say they can are trying to scare you into not doing it.

  • Source? Any proof to back this up?
    – user140963
    Sep 28, 2016 at 3:57

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