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

Main 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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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.

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".

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. 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 asofold asofold Sep 30, 2012 at 10:56 UTC - 0 likes

    @SniperzCiinema: Go

    Need more information - do you want them to place boats outside of water? In that case you need to allow them to, becasue NCP would normally prevent it. Otherwise please state versions of NCP and CB, the full versions. Does that happen when placing boats on water ?

    @harryjamesuk: Go

    "blocktype" is not supported by the current versions, either delete that string entry or the whole config to let it regenerate. The latest dev build adds blockid to fastbreak messages ( though it also adds other stuff that might use a bit more of testing.

    Not sure why "[violations]" does not get filled in though, wil have a look.


    Latest release (1.7.2-1.7.10, approved) NoCheatPlus 3.11.0-RC-sMD5NET-b739
    (Development builds: Jenkins)

  • Avatar of harryjamesuk harryjamesuk Sep 30, 2012 at 08:14 UTC - 0 likes

    @asofold: Go

    Same problem here. Yes, It's fastbreak problems. Another thing I noticed is it says this: deejaymonkey failed FastBreak: tried to break too much [blocktype]. Total violation level [violations].

    And yes, that's exactly how it looks. Not putting [blocktype] as anything. That's just what it said.

  • Avatar of SniperzCiinema SniperzCiinema Sep 30, 2012 at 05:43 UTC - 0 likes

    NoCheatPlus hates boats.... My players are just using a boat regularly and nocheatplus spams me about them, then bugs out the boat for them, any fixes?

  • Avatar of asofold asofold Sep 30, 2012 at 00:08 UTC - 0 likes

    @Destroyer_xI: Go

    That is the violations log. An error i seewith the fastbreak messages, they seem to be from very old times, you should consider regenerating the config. The block id will be put back in lateron.

    Interesting is now at which point of time players got kicked, was it the fastbreak entries?

    If in doubt please post the fastbreak actions entry of your NCP configuration, the check was different in 3.6.1 so it might kick for very low violation levels if you have not let the config regenerate with the update to the 3.7.3 version of NCP.

  • Avatar of Destroyer_xI Destroyer_xI Sep 29, 2012 at 23:24 UTC - 0 likes

    @asofold: Go

    Error. I think this speaks for itself:

  • Avatar of asofold asofold Sep 29, 2012 at 22:10 UTC - 0 likes

    @Destroyer_xI: Go

    Did you check nocheatplus.log in the plugins/NoCheatPlus folder ?

  • Avatar of Destroyer_xI Destroyer_xI Sep 29, 2012 at 21:45 UTC - 0 likes

    @asofold: Go

    I wish there was a console entry, but there isn't :/

  • Avatar of asofold asofold Sep 29, 2012 at 20:14 UTC - 0 likes

    @Destroyer_xI: Go

    Need more information, if it is NCP kicking you can be sure there will be a logging entry either on the console or in the nocheatplus.log for which check kicked them or which check alerted before kicking.

  • Avatar of Destroyer_xI Destroyer_xI Sep 29, 2012 at 19:51 UTC - 0 likes

    @asofold: Go

    Okay that solves the nuker thing, Thankyou.

    Since updating to 3.7.3 users have been randomly kicked, reason 'booted from server'

  • Avatar of asofold asofold Sep 29, 2012 at 17:56 UTC - 0 likes

    @Destroyer_xI: Go

    You can set actions to do banning.

    However in order to ban "them" you need to identify "them" and you have to count in possible client and server side lag, as well as possible bugs or false positives.

    Currently nukers are prevented by combination of several checks, the most reliable one might be the frequency check in terms of having the lowest potential for bugs and false positives while alerting most often for nukers. So testing out what values those reach for nuker use might lead to a reasonable ban level.

    Still i think the current version does prevent almost as much of nuking as one can prevent without penalizing normal game play. So what a nuker-user can do is break a couple of blocks at once until the frequency and fastbreak checks prevent further breaking for a while. The more careless nuker implementations might even fail for WrongBlock and direction checks. So what can they do... not much more than ordinary players.


Date created
Apr 02, 2012
Last update
Aug 01, 2014
Development stage
GNU General Public License version 3 (GPLv3)
Curse link
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