v11.9.2 released — see what's newThe most robust anticheat for Minecraft.
Fully predictive and version-aware — Kotka models exact movement physics for every client from 1.8.9 to 1.21+, with latency compensation and near-zero false positives.
Flags horizontal speed outside the predicted friction and momentum envelope.
Detects illegal vertical ascent and fly hacks via tick-by-tick gravity simulation.
Catches clients falsely reporting on-ground state to bypass fall damage.
Flags sustained click rates above 20 CPS over a 20-click window.
Identifies autoclickers by detecting suspiciously low timing variance.
Correlates aim snaps with block placements to detect scaffold assist.
GCD analysis on placement rotations — flags sensitivity-sized repeating steps.
Flags horizontal speed outside the predicted friction and momentum envelope.
Detects illegal vertical ascent and fly hacks via tick-by-tick gravity simulation.
Catches clients falsely reporting on-ground state to bypass fall damage.
Flags sustained click rates above 20 CPS over a 20-click window.
Identifies autoclickers by detecting suspiciously low timing variance.
Correlates aim snaps with block placements to detect scaffold assist.
GCD analysis on placement rotations — flags sensitivity-sized repeating steps.
Flags horizontal speed outside the predicted friction and momentum envelope.
Detects illegal vertical ascent and fly hacks via tick-by-tick gravity simulation.
Catches clients falsely reporting on-ground state to bypass fall damage.
Flags sustained click rates above 20 CPS over a 20-click window.
Identifies autoclickers by detecting suspiciously low timing variance.
Correlates aim snaps with block placements to detect scaffold assist.
GCD analysis on placement rotations — flags sensitivity-sized repeating steps.
Flags horizontal speed outside the predicted friction and momentum envelope.
Detects illegal vertical ascent and fly hacks via tick-by-tick gravity simulation.
Catches clients falsely reporting on-ground state to bypass fall damage.
Flags sustained click rates above 20 CPS over a 20-click window.
Identifies autoclickers by detecting suspiciously low timing variance.
Correlates aim snaps with block placements to detect scaffold assist.
GCD analysis on placement rotations — flags sensitivity-sized repeating steps.
Flags abnormally stable yaw and pitch across block placements.
Detects large yaw snaps immediately followed by near-zero movement.
Flags over-correlated yaw/pitch movement indicative of algorithmic aim.
Detects noclip by measuring collision box penetration into solid blocks.
Validates block placement reach via raycast — rejects beyond 6.5 blocks.
Cancels packets with pitch outside −90° to 90°.
Rejects packets with NaN or infinite yaw values.
Flags abnormally stable yaw and pitch across block placements.
Detects large yaw snaps immediately followed by near-zero movement.
Flags over-correlated yaw/pitch movement indicative of algorithmic aim.
Detects noclip by measuring collision box penetration into solid blocks.
Validates block placement reach via raycast — rejects beyond 6.5 blocks.
Cancels packets with pitch outside −90° to 90°.
Rejects packets with NaN or infinite yaw values.
Flags abnormally stable yaw and pitch across block placements.
Detects large yaw snaps immediately followed by near-zero movement.
Flags over-correlated yaw/pitch movement indicative of algorithmic aim.
Detects noclip by measuring collision box penetration into solid blocks.
Validates block placement reach via raycast — rejects beyond 6.5 blocks.
Cancels packets with pitch outside −90° to 90°.
Rejects packets with NaN or infinite yaw values.
Flags abnormally stable yaw and pitch across block placements.
Detects large yaw snaps immediately followed by near-zero movement.
Flags over-correlated yaw/pitch movement indicative of algorithmic aim.
Detects noclip by measuring collision box penetration into solid blocks.
Validates block placement reach via raycast — rejects beyond 6.5 blocks.
Cancels packets with pitch outside −90° to 90°.
Rejects packets with NaN or infinite yaw values.
Features
Built to catch everything
Sophisticated detection that runs so cheaters can't.
xX_l33th4x_Xx
spd.h · vl/8
ScaffoldKing
scaffold · vl/10
AimBotUser99
rot.snap · vl/9
NoFallMaster
vel.y · vl/7
KillAuraGod
cps · vl/6
PhaseWallGlitch
phase · vl/4
SpeedRunnerFake
spd.h · vl/9
xX_l33th4x_Xx
spd.h · vl/8
ScaffoldKing
scaffold · vl/10
AimBotUser99
rot.snap · vl/9
NoFallMaster
vel.y · vl/7
KillAuraGod
cps · vl/6
PhaseWallGlitch
phase · vl/4
SpeedRunnerFake
spd.h · vl/9
xX_l33th4x_Xx
spd.h · vl/8
ScaffoldKing
scaffold · vl/10
AimBotUser99
rot.snap · vl/9
NoFallMaster
vel.y · vl/7
KillAuraGod
cps · vl/6
PhaseWallGlitch
phase · vl/4
SpeedRunnerFake
spd.h · vl/9
xX_l33th4x_Xx
spd.h · vl/8
ScaffoldKing
scaffold · vl/10
AimBotUser99
rot.snap · vl/9
NoFallMaster
vel.y · vl/7
KillAuraGod
cps · vl/6
PhaseWallGlitch
phase · vl/4
SpeedRunnerFake
spd.h · vl/9
Real-Time Alerts
Violations are dispatched to staff instantly with check name, VL, and ping context. Verbose mode streams full packet-level detail.
14+ Detection Checks
Speed, flight, scaffold, aimbot rotation patterns, autoclicker variance, block phase, invalid packets — comprehensive coverage in a single plugin.
Physics Simulation Engine
Every packet is validated against a multithreaded prediction engine that models gravity, friction, ice, slime, honeyblock, and more — flags only what falls outside the legal motion envelope.
All Versions Supported
Version-aware block shapes and collision physics from 1.8.9 through 1.21+, including Folia support.
How it works
Running in under 2 minutes
Drop it in your plugins folder
Add Kotka.jar and ProtocolLib to your PandaSpigot server. No database, no config required — it works out of the box on 1.8.9 through 1.21+.
plugins/Kotka.jarAssign staff permissions
Grant kotka.notify to receive real-time alerts, kotka.command for /kotka diagnostics, and kotka.bypass to exempt trusted players from all checks.
kotka.notify kotka.commandWatch cheaters get caught
Violations stream to staff in real time with check name, VL, and ping. When a player hits max VL, Kotka kicks or bans automatically.
[Kotka] xX_l33th4x_Xx failed spd.h (8/10)Pricing
Simple, honest pricing
No surprise fees. Cancel anytime.
Community
For small servers getting started.
- Basic movement heuristics
- Basic combat heuristics
- Packet validation
- Local violation storage
- Staff alerts via chat
- No uptime guarantee
- Support via Discord
Server
For competitive and survival servers.
- Everything in Community
- Full movement prediction engine
- Advanced on-premises combat heuristics
- Cloud-assisted combat heuristics
- Uptime guarantee
- Priority Discord support
Network
For large networks with unique needs.
- Everything in Server
- Custom check tuning
- Dedicated support channel
- Source code access
- SLA & uptime guarantee
- Co-development options
Stop letting cheaters ruin your server
Drop Kotka in your plugins folder and have real detection running in under 2 minutes.