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

Features Permissions Commands Configuration Jenkins

NOW! With Minecraft 1.10 support! (on Jenkins)

Quick overview: NCP by version of Minecraft
(Links may lead to downloads not approved by BukkitDev staff, use at your own risk.)
GitHub Issue for 1.10 progress (overview)


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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 create an issue/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


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 issue/ticket or add to an existing issue/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 Bodyash Bodyash Feb 25, 2014 at 00:03 UTC - 0 likes

    @asofold: Go

    Updated Only Spigot and NCP (667-668 - crash my server. 666 seems to be ok)

    allways the same (3 crashes for 1 day, after crash #2 i updeted NCP from 667 to 668, and got crash after 3 hours of running server)

    Related ticket: #712

  • Avatar of asofold asofold Feb 24, 2014 at 22:45 UTC - 0 likes

    @StreetkillnHD: Go

    Like that but not that ! You hit the right check-group (blockinteract) but it seems you altered the blockinteract.direction settings? The check that was too spammy was blockinteract .visible so you need to alter the action of that one just as with direction (actions: cancel).


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

  • Avatar of StreetkillnHD StreetkillnHD Feb 24, 2014 at 20:46 UTC - 0 likes

    <<reply 2043357>>

    like this ?

  • Avatar of asofold asofold Feb 24, 2014 at 19:34 UTC - 0 likes

    @horsetears: Go

    Did you update the server or other plugins as well? Just remove the kick command from the wrongblock...actions entry for the time being.

    @Nikkolo94: Go

    It is latency with checking for distances and directions. With higher latency the difference from what the server can see to what a player can see can be in the seconds range. So the other player might just have moved out of the hitting range.

    @Hackettbr1: Go

    What does /nuke do ? Basically it depends on what /nuke actually does and also on what permissions you give owners - if you are ok with owners bypassing checks, then just give the owners the bypass permissions.

    @Bodyash: Go

    • Not with the third-last build of NCP? Which is the last you remember build for which this did not happen?
    • Did you update anything else (plugins / server)?
    • Does it always show the same line on top of the stack (fr.neatmonster.nocheatplus.utilities.ds.CoordMap.put(

    Code-wise i don't see how the program can halt/delay there.

  • Avatar of Bodyash Bodyash Feb 24, 2014 at 18:30 UTC - 0 likes

    Last 2 builds from jenkins:

  • Avatar of Hackettbr1 Hackettbr1 Feb 24, 2014 at 17:31 UTC - 0 likes

    can owners still do /nuke??

  • Avatar of Nikkolo94 Nikkolo94 Feb 24, 2014 at 17:25 UTC - 0 likes

    <<reply 2042236>>

    i dont think it is latency because if i remove ncp the problem isnt happening

    Sorry for my shitty english :P

  • Avatar of horsetears horsetears Feb 24, 2014 at 16:48 UTC - 0 likes

    Players on our server are getting kicked for breaking blocks out of sync a LOT since the last update, even one of the staff members that plays normally. They aren't using any mods, just eff 3 and what not picks, any reason why this just started?

    Last edited Feb 25, 2014 by horsetears

    Fires Of Titan Server

  • Avatar of asofold asofold Feb 22, 2014 at 11:31 UTC - 1 like

    @StreetkillnHD: Go

    You have to edit the configuration of NCP and then use the "ncp reload" command to apply the changes. The configuration should be in the plugins folder under NoCheatPlus/config.yml .

    To alter the blockinteract.visible actions you will look for the actions entry in the checks.blockinteract.visible section in the configuration (checks: ... blockinteract: ... visible: .... actions:). Then to the right of "actions: " you remove everything but one "cancel" entry.

  • Avatar of StreetkillnHD StreetkillnHD Feb 22, 2014 at 03:36 UTC - 0 likes

    <<reply 2042425>>

    sorry. new at this. plugin. how do i change that?


Date created
Apr 02, 2012
Last update
Jan 31, 2016
Development stage
GNU General Public License version 3 (GPLv3)
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