Detect and fight the exploitation of various flaws/bugs in Minecraft!

Features Permissions Commands Configuration Jenkins


NoCheatPlus attempts to prevent cheat clients from exploiting weaknesses of Minecraft or its protocol, making your server more safe. Checks cover a wide range of issues including flying and speeding, fighting hacks, fast block breaking and nukers, inventory hacks, chat spam and other types of malicious behaviour. For a more complete list have a look at the Features Page.

NoCheatPlus puts emphasis on configurability and allows you to customize actions that are carried out when a player fails a check (e.g. silent cancelling, executing commands, just logging). Bypass permissions allow to control what check to apply for which players, all checks can be deactivated in the configuration, also having the option for world-specific configuration files. Many checks allow more detailed configuration to adjust sensitivity.

Certainly NoCheatPlus is not a magical bullet, it uses a lot of heuristics and even guessing, so you will encounter false positives here and there and also not catch every single violation. Example video of how NoCheatPlus blocks cheats (outdated plugin version).

NoCheatPlus was introduced by NeatMonster, building on the code base of NoCheat by Evenprime.

The following plugins might be useful to have a look at.


Allows NoCheatPlus to activate packet-level checks, covering a range of exploits that can't be monitored using ordinary means. Since roughly Minecraft 1.7.10, the fight.speed check can't work as expected anymore, due to changes in CraftBukkit. With ProtocolLib this can be repaired.

CompatNoCheatPlus (cncp)

Make plugins like mcMMO, Citizens, MagicSpells or MachinaCraft more compatbile with NoCheatPlus. Not all existing plugins are covered (yet), but you can leave a note or ticket request for cncp.


Orebfuscator fights all sorts of X-ray-hacks by altering the map information that is sent to the players, such that they have to mine blocks to actually reveal what is behind. Virtually a "must have". (Latest versions of Spigot contain features of Orebfuscator.)

Downloads and History of Changes

  • Download officially approved versions on the Files page at BukkitDev.
  • Development builds have been moved over to the Jenkins at EcoCityCraft.
  • Do not download from any other source, do not use jars other people send you.
  • Changes by build number can be examined in the Jenkins changes list.
  • All commits can be seen in the GitHub commit history.
  • Plugin statistics are no longer reported to


Documentation Resources

Contact us

  • Quick questions can be asked on this page,
    or on IRC (Server: | Default-Port: 6667 | SSL-Port: 6697 | Channel: #nocheat | Web client: WebIRC)
  • For real issues or feature requests please create a new ticket or add to an existing ticket.
  • To send information that is not to be seen by all, you can also reach us by PM to @asofold and @MyPictures. @IceAP (IRC: ICE) will also help or redirect the conversation. Please do not contact the user 'NoCheatPlus', it is for administrative purposes only and will likely not be answered in time. Keep to BukkitDev and GitHub for support, do not trust users on other forums or websites, also not if their nick names are the same as NCP staff on BukkitDev.

Please always state the output of the "ncp version" command to let us know versions in use (users of cncp also the "cncp" command).

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  • Avatar of TheMCHacker TheMCHacker Nov 28, 2012 at 15:02 UTC - 0 likes


  • Avatar of TheMCHacker TheMCHacker Nov 28, 2012 at 15:00 UTC - 0 likes


  • Avatar of sundriedmailbox sundriedmailbox Nov 28, 2012 at 02:32 UTC - 0 likes

    Could you guys tell me a vl that would be impossible for a legit player to reach for survival fly and fight speed? I plan on having nocheat autoban for those, but want to make sure legit players will be left alone. It's also worth mentioning that all checks have canceling disabled (so fly vl's go higher). Right now I think 1 million for both checks would work, but would like some input from one of the plugin developers before configuring NCP to autoban.

  • Avatar of asofold asofold Nov 28, 2012 at 02:02 UTC - 0 likes

    @mrchasez: Go

    By no means downgrade.

    Rather suspect that player :) - In fact the checks in question has not been changed since way more than 15 builds. Frequency is a pretty hard timing based check, it might go off on severe lag spikes, though. So if NCP gets "spammy" on such checks and it did not do before, then this is an indication that your server has become more laggy. You can alter the configuration to allow more for the shortterm setting of blockbreak.frequency.

    Or are you using some tree-feller plugin (mcMMO)? In that case you need something to make it compatible (CompatNoCheatPlus in case of mcMMO).


    Latest beta release (1.8.x, this site) 3.13.0-BETA-sMD5NET-b878
    (Development builds, 1.8.x: Jenkins)

  • Avatar of mrchasez mrchasez Nov 28, 2012 at 00:17 UTC - 0 likes

    @MyPictures: Go

    NoCheat is so incredibly spammy in the last 15 or so builds. Would downgrading to 3.8.1 on 1.4.5 be better then the recent builds? I have removed the "i" from all fastbreak yet we get spammed by someone simply cutting a tree.

  • Avatar of asofold asofold Nov 27, 2012 at 19:29 UTC - 0 likes

    @harryjamesuk: Go

    @MyPictures: Go

    Falling out of the world should not be related to passable / survivalfly. In fact passable prevents it rather. The alerts can happen if players have not recceived chunks but are already sending moving packets (falling out of the world).

    This boils down to the basics once again: what is your CraftBukkit and NoCheatPlus versions ?

    (To just notify instead of doing something you can indeed remove cancel and kick actions, though.)

  • Avatar of MyPictures MyPictures Nov 27, 2012 at 17:29 UTC - 0 likes

    @harryjamesuk: Go

    You can do that with actions:

    @codiaz: Go

    Do you have OP/Permissions? Plugin list? CB and NC+ version? Do you use spout with compatnocheatplus? Would be better if you could make a ticket.


  • Avatar of codiaz codiaz Nov 27, 2012 at 16:52 UTC - 0 likes

    Euhm I putted everything on but nodus can still do everything like spider, walk water, etc ... :(


  • Avatar of harryjamesuk harryjamesuk Nov 27, 2012 at 16:50 UTC - 0 likes


    If I disable a check, Will I still receive notifications about it (If not, is there a way to still enable these notifications) as currently, my players either fail "Passable" or "SurvivalFly" due to lag I think causing them to fall out the world but I still want to receive notifications in-case someone really is cheating.

  • Avatar of asofold asofold Nov 27, 2012 at 12:45 UTC - 1 like

    @ed58: Go

    NCP is just stating players failing checks. Accusing of hacking is something that admins probably do / think (There is a short explanation above).

    Some checks are influenced by lag, we try to reduce the effect of lag, but some things can not be checked without timing constraints and frequency limits.

    Some checks do in fact allow to be configured for more tolerance in case of lag. It now depends on what checks are in question.

    I will try to bring in more documentation about which checks are influenced by lag and how, and also to add some "serious" lag detection to NCP accounting both for average tps drops and lag spikes.


Date created
Apr 02, 2012
Last update
Nov 25, 2015
Development stage
GNU General Public License version 3 (GPLv3)
Curse link
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