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 Example video of how NoCheatPlus blocks cheats (outdated plugin version).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 szebi1999 szebi1999 Mar 02, 2014 at 14:22 UTC - 0 likes

    Ucars Vs NocheatPlus

    Log. :O

  • Avatar of asofold asofold Mar 02, 2014 at 12:50 UTC - 0 likes

    @Robson112011: Go

    Thanks, this looks like survivalfly false positives - do you happen to have "ordinary" log messages like in-game alerts or console or nocheatplus.log entries with the survivalfly failures of such a jump? Specifically if you have the [tags] shown in the flyshort and/or flylong messages in the strings section. This could help identifying what part of survivalfly triggers here.

    @ThaSourceGaming: Go

    We have several measures taken that effects of forcefield hacks get reduced by a good bit.


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

  • Avatar of ThaSourceGaming ThaSourceGaming Mar 02, 2014 at 02:50 UTC - 0 likes

    Did you guys block forcefield hack during pvp?

  • Avatar of Robson112011 Robson112011 Mar 01, 2014 at 22:37 UTC - 0 likes

    @asofold: Go

    Tested now falling to 41 blocks high, I died and in the chat message appeared: Robson112011 fell from a high place. I died on touching water.

    Before: 01.03 20:20:53 [Server] INFO NCP: [20:17:41] blockinteract.visible VL 1 (n1a1m1) 01.03 20:20:53 [Server] INFO NCP: [20:18:54] moving.survivalfly VL 388 (n4a97m160) 01.03 20:20:53 [Server] INFO NCP: Displaying Robson112011's violations...

    After: 01.03 20:21:48 [Server] INFO NCP: [20:17:41] blockinteract.visible VL 1 (n1a1m1) 01.03 20:21:48 [Server] INFO NCP: [20:21:35] moving.survivalfly VL 458 (n7a65m160) 01.03 20:21:48 [Server] INFO NCP: Displaying Robson112011's violations...

    My console show messages in upward.

    Sometimes does not die but receive damage and back into place where it started the jump.

    If need versions, my /ncp version: 01.03 20:24:59 [Server] INFO Hooks: mcMMO(cncp) 2.3 01.03 20:24:59 [Server] INFO MCAccess: 1.5.2 / CB2763 01.03 20:24:59 [Server] INFO Plugin: 3.10.8-RC-sMD5NET-b664 01.03 20:24:59 [Server] INFO NoCheatPlus 01.03 20:24:59 [Server] INFO git-Bukkit-1.5.2-R1.0-b2788jnks (MC: 1.5.2) 01.03 20:24:59 [Server] INFO Server 01.03 20:24:59 [Server] INFO Version information --

    Last edited Mar 01, 2014 by Robson112011
    I'm bilingual.
    I'm programmer of Artcraft servers. I'm braziliam.
  • Avatar of asofold asofold Mar 01, 2014 at 15:14 UTC - 0 likes

    @X00LA: Go

    Build 670 should correct this.

  • Avatar of asofold asofold Feb 28, 2014 at 18:28 UTC - 0 likes

    @Robson112011: Go

    Do the players die on touching the water or just somewhere in air?

    Can you show violation messages of players death during falling? I am most interested in the ones stating the distance and tags, if you have not changed the configuration to hide those, but any alerts/log messages that can be tracked to such a case would be interesting.

  • Avatar of Robson112011 Robson112011 Feb 28, 2014 at 12:15 UTC - 0 likes

    Players dying when falling over the water of a very high place. It is a bug in the NCP or may be another plugin?

  • Avatar of asofold asofold Feb 28, 2014 at 09:29 UTC - 0 likes

    @LihPeu: Go

    The movie seems broken.

    Maybe it is related to Ticket 705 ?

  • Avatar of LihPeu LihPeu Feb 27, 2014 at 12:49 UTC - 0 likes


    A hack has recently been brought to my attention and I wonder if you know what it's called, I have a video that a player recorded for me below.

    Tthe hacking player is disguised as a wolf for purposes of the game mode and his health can be seen on the bar at the top of the screen. Once the player reaches low health the hack client automatically makes him invaluable and he appears to glitch up and down while his health regenerates.

  • Avatar of asofold asofold Feb 27, 2014 at 08:13 UTC - 0 likes

    @X00LA: Go

    The first is about blocks that NCP can not know, so NCP does not have data about how fast they can be broken or how to treat the blocks for collision-checking.

    The ingame messages are probably due to [MoCreatures] using a Player to implement NPC functionality. Are there any "helper" or "pet" creatures that do something like block breaking for the player?


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