KingAC

Anti-cheat with a sus list for Paper 1.21.11. Cheaters get flagged, not kicked, and blatant ones get a temporary ban.

Features

📋 Sus list

Every failed check adds a flag and puts the player on the sus list. Run /sus to see everyone flagged, most flagged first, with how many times each player has been flagged. Click a name for the full breakdown.

🛡️ Checks

• Fly, Speed, NoFall
• Reach, Aim (hit something that wasn't under the crosshair), Multi-target
• AutoClicker
• Anti X-Ray: flags players who keep uncovering hidden ores far faster than natural ore density allows

Each check has its own on/off switch and thresholds. Checks have to build up violation points before they flag, and a check can only flag a player once per cooldown, so one hacking session doesn't inflate the count.

🔨 Bans

• Blatant cheaters: at 70 flags a player is kicked and banned for 10 days (the maximum). Uses the server's own ban list by default, or your ban plugin's temp-ban command.
• Gone for a week: sus-listed players who stay offline for 7+ days are banned automatically.
• Everyone else just stays on the list.

🔒 Immunity

Players with kingac.immune are never checked and never flagged. Nobody has it by default, not even OPs.

Commands

| Command | What it does | Permission |
|---|---|---|
| /sus [page] | Show the sus list | kingac.view |
| /sus info | Flags per check, last flag, location, ban countdowns | kingac.view |
| /sus clear | Take a player off the list | kingac.manage |
| /sus reload | Reload the config | kingac.manage |

kingac.alerts gives live flag messages when alerts are turned on in the config.

Configuration

Edit plugins/KingAC/config.yml, then run /sus reload. Sections:

• Checks: on/off and thresholds for each check
• Flags: cooldown between flags, alerts, list page size
• Blatant ban: flag count, days (max 10), optional ban-plugin command
• Auto-ban: days offline, minimum flags, ban command
• X-Ray: ore list, window and ratio

Blatant bans are also logged to plugins/KingAC/bans.log.

Requirements

Paper 1.21.11 and Java 21. No other plugins needed. Server-side only.

FAQ

Will it ban legit players?
No single flag bans anyone, and 70 flags is a lot. Behavioural checks can still false-flag on lag spikes or other plugins' movement tricks, so consider raising auto-ban.min-flags (for example to 5) so one stray flag can never lead to a ban.

I use LiteBans / EssentialsX.
Set blatant-ban.command to your temp-ban command, for example tempban {player} {days}d {reason}.

Does it replace Paper's anti-xray?
No. KingAC's anti-xray is behavioural. For packet-level ore hiding, also enable Paper's built-in anti-xray.

Creative and spectator players?
They're skipped.

Early release. Tell me what breaks.