Online Watcher
by XiGua_TUT
Online Watcher tracks a list of player names on a multiplayer server and reports when each one joins or leaves.
What it does
Players add names to a watchlist, and the Fabric client then notifies the player when a listed name comes online, with a green message on joining and a message when the name leaves. Detection reads the player list that the Tab key shows, so it matches the names as they appear there, including any prefixes, suffixes or rank tags the server adds. Matching is done against the original Mojang account names.
Each monitored player's online status appears in a small panel anchored to the bottom-right corner of the screen. Detection works in any dimension the monitored player is in. The mod can be switched on and off in the config screen, and it is configured through Mod Menu when that mod is present.
The mod runs on Fabric 1.21.11 only, with Fabric Loader 0.15.11 and Fabric API as its dependency. It is client-side only, so servers do not need it and players join without installing anything. The license is Creative Commons Attribution No Derivatives 4.0, and the code is not open source.
Key features
Player watchlist
A list of player names is kept on the client, and each name can be added or removed while playing.
Join and leave notices
A green message appears when a watched player joins, and another message appears when they leave.
Corner status overlay
A small panel in the bottom-right corner lists the online status of each monitored player.
Cross-dimension detection
A watched player is detected whatever dimension they are in, so travel between worlds does not hide them.
Config and Mod Menu
The mod can be enabled or disabled from a config screen, and Mod Menu gives access to its settings.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Players on multiplayer servers who want to know when particular friends or regular players are online. The mod is client-side, so it suits players who join servers they do not control.
How it compares
MetBefore is also a Fabric client-side mod, with files for 1.21.1 – 1.21.11 under the MIT License, and it is not open source. Online Friends is Fabric and client-side only, with a single file for 1.21.4 under the Apache License 2.0, and it is not open source. Online Watcher covers only 1.21.11 and uses the Creative Commons license, so it differs from both in version range and license.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Online Watcher | Fabric | 1.21.11 | Client-side only | 2026-06-13 |
| MetBefore | Fabric | 1.21.1 – 1.21.11 | Client-side only | 2026-04-03 |
| Online Friends | Fabric | 1.21.4 | Client-side only | 2026-09-07 |
Questions
Does Online Watcher need Fabric API?
Does the server need Online Watcher installed?
Which Minecraft versions does Online Watcher support?
In the catalog
Online Watcher 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 XiGua_TUT
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What the author says
A lightweight Minecraft Fabric client-side mod that monitors specific players' online status on multiplayer servers. The mod reads player names directly from the network player list (the same data shown when pressing Tab), matching against the original Mojang account names. Server-added prefixes, suffixes, or rank…
Official listing
- Modrinth page
- modrinth.com/mod/online-watcher
- Owner
- XiGua_TUT
- Published
- 2026-05-30
- Updated on Modrinth
- 2026-06-13
- Facts verified
- 2026-10-15