Always Online
Always Online keeps a Fabric server reachable while Mojang's authentication servers are unavailable, by caching player profiles.
What it does
When the authentication service is down, the server keeps accepting players who have joined before, using profile data it stored earlier. Pairing the mod with the online-mode setting and authlib-injector lets a server keep its authentication benefits during an outage. Only the server runs the mod, so players join without installing anything. It requires Fabric API and oωo (owo-lib), and is licensed under the GNU Affero General Public License v3.0 only, making it open source.
Key features
Login during outages
Returning players can still connect when Mojang's authentication servers cannot be reached.
Cached player profiles
Profile data is stored on the server so that known players can be verified without a live lookup.
Online mode support
Servers set to online-mode true with authlib-injector keep those benefits while the service is down.
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 2
How it compares
Packet Auth is a client and server mod under All rights reserved, published for Fabric and Quilt across 1.18 – 1.21.5 and not open source. Connecto is server-side only, open source under the MIT License, and covers 1.20.2 – 26.2 on Fabric.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Always Online | Fabric | 1.20.4 | Server-side only | 2024-04-21 |
| Packet Auth | Fabric and Quilt | 1.18 – 1.21.5 | Client and server | 2025-05-15 |
| Connecto | Fabric | 1.20.2 – 26.2 | Server-side only | 2026-08-12 |
Questions
Does Always Online need Fabric API?
Does a player need the mod to join?
In the catalog
Always Online is one of 7,555 Cursed mods on ModsFinder, and one of 4,235 Cursed mods for Fabric. 13,907 mods support Minecraft 1.20.4.
More from Undefined_0721
Similar mods
What the author says
This server-side mod keeps your server still can be entered by caching player profiles if Mojang's auth server is down. Your server is set online-mode to true (authlib-injector can also get benefits from this mod)
Official listing
- Modrinth page
- modrinth.com/mod/alwaysonline
- Owner
- Undefined_0721
- Published
- 2024-04-21
- Updated on Modrinth
- 2024-04-21
- Facts verified
- 2026-10-15