Online PatPat
Online PatPat is a Fabric client addon that lets players pats sync between friends on different servers, through a WebSocket relay.
What it does
The addon works alongside the original PatPat mod on the client. It reads the server address a player is connected to and places that player in a hidden room, so everyone on the same server shares pats without any extra setup. Players on different servers can instead enter a shared room ID to sync with friends who are elsewhere.
Cross-server syncing runs through a relay server, which can be the default one or a custom host and port set in the config. Pats travel over WebSocket, and the whole feature can be switched off. Proxy networks running Velocity or BungeeCord are supported. Installation requires the original PatPat mod on the server, and the addon needs Fabric API on the client. The mod is released under CC0 1.0 Universal and is open source, and its source code is public.
Key features
Cross-server syncing
Pats sent by one player reach friends on other servers in the same proxy network through a WebSocket relay.
Manual room IDs
Players can set a room ID by hand to sync with friends on an entirely different server.
Custom relay settings
Sync can be enabled or disabled, and the relay host and port can be set to a custom server.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Proxy networks
Groups on a Velocity or BungeeCord network can share pats across the servers they connect to.
Friends on separate servers
Players who meet on different servers can share a room ID and keep pats in sync.
Who it’s for: Players who use the PatPat mod on multiplayer servers, especially on a proxy network, and server owners who run Velocity or BungeeCord setups.
How it compares
PatPatFix is a Fabric client mod for 1.20 – 26.2 under the MIT License, not open source, and it does not sync pats across servers. Player Relay is open source under the GNU Affero General Public License v3.0 only, with client-side only files for 1.21.6 – 1.21.11, and it covers a different relay purpose. ChatSocket is client-side only and open source under CC0 1.0 Universal, built for 1.21.5.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Online PatPat | Fabric | 1.21.11 | Client-side only | 2026-06-18 |
| PatPatFix | Fabric | 1.20 – 26.2 | Client-side only | 2026-07-22 |
| Player Relay | Fabric | 1.21.6 – 1.21.11 | Client-side only | 2026-06-21 |
| ChatSocket | Fabric | 1.21.5 | Client-side only | 2025-05-16 |
Questions
Does Online PatPat need Fabric API?
Does the Minecraft server need a plugin for cross-server syncing?
Which game version is supported?
In the catalog
Online PatPat is one of 5,392 Social mods on ModsFinder, and one of 4,084 Social mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
A cross-server synchronization addon for the popular PatPat mod.
Official listing
- Modrinth page
- modrinth.com/mod/online-patpat
- Owner
- FlashTurbo2021
- Published
- 2026-06-14
- Updated on Modrinth
- 2026-06-18
- Facts verified
- 2026-10-15