CurseForge · Minecraft mod
Captcha
Adds Captcha's to Minecraft
Quick answer
Which Captcha release matches 1.21 Fabric?
Captcha 9.0.0 targets 1.21 with Fabric. Installation on the client is optional. Installation on the dedicated server is optional. All 2 required mods have matching files.
Where it goes
Is Captcha required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Captcha 9.0.0 need?
9.0.0 on 1.21 Fabric. Every mod below is checked against that same setup.
Install Cloth Config API, Fabric API first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Captcha without breaking your instance.
Built for Captcha 9.0.0 on 1.21 Fabric. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 9.0.0. It targets 1.21 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Cloth Config API, Fabric API first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 9.0.0. It opens that exact file at the source.
About this project
What does Captcha add?
If you've been around the internet you know all about Captcha's. This mod adds them to Minecraft!
By default the mod will require the user to finish a Captcha to continue doing what they were doing. The default cooldown between Captcha requests is 15 minutes.
Currently you can experience the following Captcha types using the mod:
- I'm not a monster (Where you have to prove you're not a monster by clicking the checkbox)
- Math question (Where you have to answer a math question)
But that's not all! The latest update brings even more excitement with new additions:
- Text Captcha: Transcribe distorted or obscured text to prove your observation skills.
- Image Captcha: Identify and select correct objects or patterns in images to demonstrate your visual perception.
The "Captcha" mod also provides config options for fine-tuning the gameplay experience. With options such as:
- gracePeriod - Set the duration of uninterrupted gameplay before Captcha challenges begin.
- captchaTime - Adjust the time limit for solving each Captcha challenge.
- captchaCooldown - Define the interval between successive Captcha requests.

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Project description from CurseForge.
Pick your setup
Captcha by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.2
2 loader builds26.1.2
2 loader builds26.1.1
2 loader builds1.21.11
2 loader builds1.21.10
2 loader builds1.21.8
2 loader builds1.21.5
2 loader builds1.21.4
2 loader builds1.21.1
2 loader builds1.21
2 loader builds1.20.6
2 loader builds1.20.4
2 loader buildsShowing the newest 12 of 22 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Captcha versions and loaders
9.0.0
Captcha-fabric-1.21-9.0.0.jar
30 Jun 2024
Captcha-fabric-1.21-9.0.0.jar
30 Jun 2024
Looking for an older file? The official CurseForge project page is in Resources.
