simppassforfree
SimpPassForFree is a Fabric server mod that holds unverified players in place until they pass identity checks through the SimpPass API.
What it does
Players who have not passed verification cannot perform game actions, and their position stays locked until they do. Verification runs through the official SimpPass API, where a WeChat account's real-name authentication supplies the identity check, so players obtain their verification codes through a WeChat Mini Program. The mod is meant to stop batch registration of fake accounts and to make the verification step harder to abuse with alternate accounts.
Checks on the API side include IP inspection, geolocation and other risk control, and the mod is intended for servers that need reliable authentication before admitting players. The project ships a configurable verification session timeout, defaulting to 120 seconds, and an option to kick players whose sessions time out, which is enabled by default.
Installation requires a SimpPass developer UUID, and the mod is open source under the GNU Affero General Public License v3.0 or later. Files exist for 1.20.1 and 1.20.2, with the latest Fabric build, 1.0.0 for 1.20.2, published on 2026-01-10. It runs on the server alone, so players join without installing anything.
Key features
Position lock
Unauthenticated players stay in place and cannot move until verification is complete.
Restricted actions
Players who have not passed verification are blocked from normal game operations.
Verification commands
Unverified players use a login command for verification codes, an account binding command and a help command.
Session timeout
Verification sessions expire after a configurable number of seconds, 120 by default, with optional automatic kicks.
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: Server owners running Fabric servers on 1.20.1 or 1.20.2 who want players to pass identity verification through the SimpPass API before they can play.
How it compares
SuperAuth is server-side only, under the MIT License, for Fabric versions 1.20 – 1.21.4, and is not open source. MineAuth is also server-side only and open source under the MIT License, but its files target 1.21.11 only. Server List Password Mod runs on both client and server for 1.21.1 – 1.21.11, under the MIT License, and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| simppassforfree | Fabric | 1.20.1 – 1.20.2 | Server-side only | 2026-01-10 |
| SuperAuth | Fabric | 1.20 – 1.21.4 | Server-side only | 2024-09-09 |
| MineAuth | Fabric | 1.21.11 | Server-side only | 2026-01-06 |
| Server List Password Mod | Fabric | 1.21.1 – 1.21.11 | Client and server | 2026-07-16 |
Questions
Does SimpPassForFree need a developer UUID?
Does a player need the mod to join a server?
Can the timeout kick be turned off?
In the catalog
simppassforfree is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 12,076 mods support Minecraft 1.20.2.
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What the author says
A cross-loader Minecraft player authentication and login system that provides reliable identity verification for servers. SimpPassForFree is a player authentication mod designed for Minecraft Fabric servers. It solves scenarios requiring reliable authentication by integrating with the SimpPass API, effectively…
Official listing
- Modrinth page
- modrinth.com/mod/simppassforfree
- Owner
- xiaofanforfabric
- Published
- 2026-01-08
- Updated on Modrinth
- 2026-01-10
- Facts verified
- 2026-10-15