QUIC-MC
by nemiwastaken
QUIC-MC adds a QUIC transport for Minecraft game traffic, carried over UDP instead of the usual TCP connection, for players and servers that both run it.
What it does
The client side is a Fabric mod that reroutes gameplay connections through a local QUIC tunnel to a Velocity proxy. It is installed on the player's side alone, so servers need nothing. On the server side, a Velocity proxy plugin opens a UDP port that takes game connections from players who run the mod, and then hands them to a regular TCP proxy. Only the Velocity plugin is needed on the server, and it works only on Linux x86_64. Windows and macOS builds are not available.
Because QUIC runs over UDP, a lost packet does not stall the other data streams, so lost data is recovered and connections can reconnect faster. The mod aims to reduce latency and disconnects on unstable networks, but only when both the server and the client use QUIC-MC. A server without the plugin gets no benefit, and players with the mod cannot connect to it through QUIC. Regular servers keep using TCP as usual. QUIC-enabled servers are marked with an icon in the server list. Connections use an access key tied to one specific server, requested once after connecting, and this happens automatically.
The project is published for Fabric across 10 release versions, 1.21.2 – 1.21.11, with 0.9b for 1.21.11 as the latest beta file. It requires Java 21. The code is open source under the GNU Affero General Public License v3.0 only, and the source code and issue tracker are public.
Key features
QUIC transport for game traffic
Game connections travel over a QUIC link on UDP rather than the standard TCP path used by regular servers.
Local tunnel on the client
The client reroutes gameplay connections through a local QUIC tunnel, without changes to how the player joins a server.
Velocity proxy plugin
The server plugin accepts QUIC connections on a separate UDP port and bridges them back to a standard TCP proxy.
Automatic access keys
An access key tied to one specific server is requested once after connecting, with no manual step from the player.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
QuicProtocolSupport is a client and server Fabric mod for 1.20.1, released under the GNU Lesser General Public License v3.0 or later. Mirage Sync is a Fabric mod for 1.21.11 that is server required, with client installation optional, under the MIT License. Proxy Server is a client-side only Fabric mod for 1.20 – 1.21.8, released under the MIT License, so it changes nothing on the server side.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| QUIC-MC | Fabric | 1.21.2 – 1.21.11 | Client-side only | 2026-08-10 |
| QuicProtocolSupport | Fabric | 1.20.1 | Client and server | 2025-06-28 |
| Mirage Sync | Fabric | 1.21.11 | Server required, client optional | 2026-04-25 |
| Proxy Server | Fabric | 1.20 – 1.21.8 | Client-side only | 2025-10-27 |
Questions
Does QUIC-MC need Velocity on the server?
Can QUIC-MC run on Windows or macOS servers?
Which game versions does QUIC-MC support?
In the catalog
QUIC-MC is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
A mod and plugin that add QUIC (UDP) transport for Minecraft game traffic instead of the usual TCP connection. QUIC runs over UDP and, unlike TCP, doesn't stall all data streams when a single packet is lost, and recovers connections faster. This can reduce latency and disconnects on unstable networks — provided both…
Official listing
- Modrinth page
- modrinth.com/mod/quic-mc
- Owner
- nemiwastaken
- Published
- 2026-08-07
- Updated on Modrinth
- 2026-08-10
- Facts verified
- 2026-10-15