
ChatPatcher
yep, it's paint.
ChatPatcher is a Velocity plugin that removes the signed chat messages feature introduced in Minecraft 1.19+ If you’ve encountered errors such as:
- “A plugin tried to cancel a signed chat message”
- “A proxy plugin caused an illegal protocol state”
you're likely to require this one!
for reference
Why Use ChatPatcher?
With the release of Minecraft 1.19.1, Mojang introduced mandatory signed chat messages to enhance security and message integrity. While this change aims to reduce abuse and ensure authenticity, it has inadvertently caused compatibility issues for networks relying on Velocity's chat manipulation features. ChatPatcher removes these restrictions, restoring the classic chat handling that many servers have long depended on.
Learn more about signed chat messages and their implications
Usage
ChatPatcher requires no setup and no dependencies.
Beware! ChatPatcher DOES NOT replace Paper side plugins such as NoPopup, NoChatReports, ...
Actually, we don't do any packet modification, we're just tweaking Velocity using reflections (ik, i also hate that, but better than having to maintain a fork).
Contributing
To contribute:
- Fork the repository.
- Create a new branch for your feature or bugfix:
git checkout -b feature-name - Make your changes and commit them with clear, descriptive messages:
git commit -m "Add new feature" - Push your changes to your fork:
git push origin feature-name - Create a pull request with a detailed description of your changes.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.5
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as ChatPatcher-1.0.6.jar — drop this file into the mods folder
- Download size: 21 KB
- Download link checked 6 Sept 2026 — working
These come from our own check of the pack file, not from the source page.