mod
StateObserverMinecraft mod for 1.21.1
A library for observing blockstate changes.
- Latest version
- 1.6.4
- Minecraft
- 1.18.2 to 1.21.1
- Java
- Java 21+
- Loaders
- Fabric, NeoForge, Forge
- Licence
- LGPL-3.0-or-later
- Downloads
- 180.3k
- Updated
- 11 mo ago
- Available on
- Modrinth
Our hostingHost StateObserver servers
One click and StateObserver is installed with the right loader, on hardware built for it.
- 1.21.1
- Fabric
- NeoForge
- Forge
- One click mod install
- Loader matched for you
- Ryzen CPUs
- NVMe SSD
Minecraft versions
Every version StateObserver declares support for, newest first, with the Java runtime that version needs.
Download
From StateObserver’s own host. Nothing is re-hosted here.
For Minecraft 1.21.1
Choose the loader you use before downloading.
- Get NeoForge
NeoForge
1.6.4 · 20 Dec 2025 · stateobserver-neoforge-1.21.1-1.6.4.jar
- Get Fabric
Fabric
1.5.3 · 9 Nov 2024 · stateobserver-fabric-1.21.1-1.5.3.jar
Most recently published release
stateobserver-neoforge-1.21.1-1.6.4.jar · 14 KB · for 1.21.1 · NeoForge
3a10dc4be863…Older versions14Hide older versions
- 1.6.322 Jun 20251.21.114 KB13.4k downloads
784707f8ee74…Get - 1.6.222 Jun 20251.21.114 KB55 downloads
6e4a5be374e1…Get - 1.6.112 May 20251.21.113 KB2.7k downloads
7dfedc994353…Get - 1.6.012 May 20251.21.113 KB58 downloads
c1436c0b6638…Get - 1.4.311 Dec 20241.20.113 KB49.1k downloads
3e9c70bb25ba…Get - 1.5.411 Dec 20241.21.112 KB4.6k downloads
78dd0b9cd957…Get - 1.5.39 Nov 20241.21.113 KB243 downloads
fcc94c2a2c33…Get - 1.5.27 Nov 20241.21.113 KB82 downloads
181d565f3ba6…Get - 1.5.17 Nov 20241.21.112 KB55 downloads
65023c8859e5…Get - 1.5.04 Nov 20241.21.113 KB70 downloads
c2148d3495c9…Get - 1.4.21 Jun 20241.20.113 KB4.2k downloads
c5460fece390…Choose file on publisher ↗ - 1.4.030 May 20241.20.111 KB106 downloads
b43298ece124…Get - 1.3.130 May 20241.19.211 KB1.6k downloads
968578799e5e…Get - 1.2.130 May 20241.18.212 KB4.2k downloads
a304be2301e1…Get
Frequently asked
Does StateObserver work on Minecraft 1.21.1?
Yes. 1.21.1 is the newest Minecraft version StateObserver declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.
Which Minecraft versions does StateObserver support?
Everything the author has declared, from 1.18.2 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.
Do I need to install StateObserver on the client or the server?
Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.
Which platform or loader does StateObserver support?
Fabric, NeoForge, Forge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.
Which Java version do I need for StateObserver?
Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.
What licence is StateObserver under?
LGPL-3.0-or-later, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.
How do I install StateObserver?
Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.
Where do I download StateObserver safely?
Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.
Works on the same versions
Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.
Used by
1 project lists StateObserver as a required dependency.
Is this information wrong or missing something? .