Seamless - Serverless Multiplayer
by Ecentrix
The mod lets a player open a singleplayer world to friends through a 6-digit invite code, without port forwarding or a dedicated server.
What it does
A host opens the game menu and starts a session, and friends join by entering the code in the join menu. Before connecting, a player can see warnings about mismatched mods, and the host's client detects mods automatically. Live player counts and session status are shown, and the session is cleaned up after one hour of inactivity.
Players who disconnect can rejoin the same session, and the session is restored afterward. The mod needs Fabric API on Fabric, and it is published for Fabric, NeoForge and Quilt across three game versions, 1.21.1 – 1.21.11, under All rights reserved. Client and server both need the mod, so every player who joins a session runs it too.
Key features
Instant invite codes
A host gets a 6-digit code from the game menu, and friends enter it in the join menu to connect.
Pre-join mod checks
Warnings about mod differences appear before a player connects, and clear requirement lists help with troubleshooting.
Live session status
Player counts and session status update while a session is open, so the host can see who is connected.
Session restoration
Players who disconnect can rejoin the session, with the session restored and inactive sessions cleaned up after an hour.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Hosting a singleplayer world
A player opens a singleplayer world and shares a code so friends can join without setting up a server.
Who it’s for: Players who want to play with friends without router configuration or a dedicated server. Server owners who run modded worlds may also use it to check mod requirements before players connect.
Questions
Does this mod need Fabric API?
Do both the host and the players need the mod?
Which game versions does this mod support?
In the catalog
Seamless - Serverless Multiplayer 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.
More from Ecentrix
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What the author says
Tired of complicated server setups? Seamless transforms multiplayer gaming by eliminating the technical headaches. No port forwarding nightmares, no router configuration struggles – just pure gaming fun with your friends! Seamless revolutionizes how you play Minecraft with friends by bringing server hosting directly…
Official listing
- Modrinth page
- modrinth.com/mod/seamless-serverless-multiplayer
- Owner
- Ecentrix
- Published
- 2026-02-05
- Updated on Modrinth
- 2026-03-03
- Facts verified
- 2026-10-15