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SentinelAC

Free#29 of 57 in Minecraft Anti-Cheat Plugins

SentinelAC: A free, open-source Fabric 1.21.6 mod with configurable checks, alerts and enforcement. Ranked #29 of 57 in Minecraft Anti-Cheat Plugins by our editors (5.7/10); pricing: Free plan; best for fabric 1.21.6 servers needing configurable checks.

5.7/10Editor score

View SentinelAC

SentinelAC5.7 View SentinelAC

At a glance

Editor score
5.7 / 10
Pricing
Free plan
Best for
Fabric 1.21.6 servers needing configurable checks
Free plan
Yes
Paid from
Free
Server platforms
Fabric
Facts checked
23 Sep 2026

Where it wins
- Sixteen checks cover movement, combat, world interaction and packet behavior
- Staff alerts, suspicion scores and configurable kick, ban or command actions
- Persistent statistics, JSONL event logs and optional Discord notifications
Where it doesn't
- Limited to Fabric servers running Minecraft 1.21.6
- Punishments are off by default and require configuration
- No replay analysis; enforcement depends on live checks and event logs

Our verdict on SentinelAC

SentinelAC is a server-side anti-cheat and administration mod for Fabric servers running Minecraft 1.21.6. It is suited to solo operators and small server teams who want configurable detection and moderation tools in one self-hosted package. The MIT-licensed project is open source and available at no cost. A client installation can also show an observer HUD with local alerts, while server staff can use administration commands and a clickable chat menu.

Its sixteen checks span movement, combat, world interaction and packet behavior, including Speed, Fly, KillAura, Reach, Scaffold and BadPackets. Operators can tune detection thresholds and staff alerts, with per-player suspicion scoring to support moderation decisions. Punishment options include no action, kick, ban or a custom command, but they are configurable and off by default. Persistent player statistics and rotating JSONL event logs provide records for review; there is no replay analysis. This makes SentinelAC a fit for teams that want to adjust checks and examine logged events, rather than review recorded gameplay.

Deployment and compatibility define the main trade-off: SentinelAC is limited to Fabric and Minecraft 1.21.6, so servers using another platform or version should look elsewhere. It is self-hosted, and optional Discord webhook notifications are its stated external integration. The client HUD is an additional observer aid, not a substitute for server-side checks. Choose SentinelAC if your server matches its narrow platform target and you want open-source controls over detection and punishment; choose another option if you need broader version coverage, replay analysis or a different server platform.

Your product? Our editors can test SentinelAC in depth and publish a review, labelled as paid · from $149/mo →

SentinelAC pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on github.com

SentinelAC fact sheet

Free plan	Yes
Paid from	Free
Server platforms	Fabric
Minecraft versions	1.21.6
Detection coverage	Movement: Speed, Fly, NoFall, Jesus, Step, Timer, Elytra exploits; Combat: KillAura, Reach, AutoClicker, Criticals, Velocity; World: Scaffold, FastBreak, InventoryMove; Packets: BadPackets
Enforcement actions	None, kick, ban, or custom command (configurable; punishments off by default)
Licensed servers	Not verified
Replay analysis	No
Deployment	Self-hosted
Platforms	Linux, Windows, macOS
Support	Community
Built for	Solo, Small business (editorial estimate)
Integrations	1 integrations: Discord webhook
Pricing	Free plan
Website	github.com
Facts checked	23 Sep 2026

SentinelAC integrations

SentinelAC lists 1 integrations on its own site.

Discord webhook

Alternatives to SentinelAC

See all SentinelAC alternatives →

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used SentinelAC for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

SentinelAC is listed in our Minecraft Anti-Cheat Plugins directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update