HackWatch
by Hambis
HackWatch is a client-side Fabric mod that flags suspicious player behaviour in multiplayer, so a player can weigh the evidence before deciding anything.
What it does
Players who lose fights often want to know whether an opponent is cheating. HackWatch runs in the background on the client and checks other players for patterns linked to cheats, then shows warnings only to the local player. Nothing is posted publicly, so the mod never accuses anyone in chat.
Owners of servers can use the same warnings as one input when they want another view on a player. Streamers and recorders can enable an anonymous mode that scrambles player names on screen, so viewers do not see who is flagged. The mod works only on Minecraft 1.21.1 with Fabric, and it is released under the MIT License. It is not open source, and it is client-side only, so the server does not need it.
Key features
Quiet background checks
The mod watches other players while the game runs and keeps its warnings private to the local player.
Combat pattern warnings
It flags reach hits, instant aim snaps, fake critical hits, anti-knockback and auto-totem swaps that look unlike normal play.
Anonymous mode
An option scrambles player names on screen, which helps streamers and recorders keep flagged players unnamed.
Evidence before action
Warnings are meant as a prompt to check what happened, rather than as proof that a player cheated.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
PvP disputes
A player who feels beaten by impossible hits can check whether the opponent matches any of the flagged patterns.
Server moderation
Server owners can read the warnings as one input before deciding whether a player needs attention.
Streaming and recording
Anonymous mode lets a creator show a match while keeping flagged players unnamed on screen.
Who it’s for: Players in competitive multiplayer, server owners who look into suspected cheating, and streamers who record matches with other players present.
How it compares
Warn on run_command is a client-side Fabric mod for 1.21.5 under the Creative Commons Attribution 4.0 license, and it is not open source. Iustitia Anti-Cheat is a client-side Fabric mod for 1.21.11 under the MIT License and is open source. BackAlert is client-side for Fabric on 1.21.1 – 1.21.11 under the MIT License, and it is not open source. HackWatch covers only 1.21.1, so it differs from these in version range.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| HackWatch | Fabric | 1.21.1 | Client-side only | 2026-07-08 |
| Warn on run_command | Fabric | 1.21.5 | Client-side only | 2025-06-16 |
| Iustitia Anti-Cheat | Fabric | 1.21.11 | Client-side only | 2026-09-21 |
| BackAlert | Fabric | 1.21.1 – 1.21.11 | Client-side only | 2026-03-20 |
Questions
Does HackWatch need to be installed on the server?
Which loader and version does HackWatch support?
Can HackWatch accuse a player publicly?
In the catalog
HackWatch is one of 5,392 Social mods on ModsFinder, and one of 4,084 Social mods for Fabric. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
HackWatch — Client-Side Cheat Detector for Fabric 1.21.1 Tired of losing fights and not knowing if the other person is cheating? HackWatch runs quietly in the background and watches other players for signs of cheating — warning you privately so you can make up your own mind, without ever accusing anyone publicly…
Official listing
- Modrinth page
- modrinth.com/mod/hackwatch
- Owner
- Hambis
- Published
- 2026-07-08
- Updated on Modrinth
- 2026-07-08
- Facts verified
- 2026-10-15