CurseForge · Minecraft mod
BlockBrain
BlockBrain is a context-aware AI companion mod built for Minecraft Fabric. It acts as an intelligent assistant that lives directly inside your game's HUD, providing real-time help without interrupting your gameplay.
Quick answer
Which BlockBrain release matches 1.21?
BlockBrain-v1.0.0-1.21-1.21.1.jar targets 1.21, 1.21.1-Snapshot, 1.21.1 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. All 1 required mods have matching files.
Where it goes
Is BlockBrain required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does BlockBrain-v1.0.0-1.21-1.21.1.jar need?
BlockBrain-v1.0.0-1.21-1.21.1.jar on 1.21. Every mod below is checked against that same setup.
Install Fabric API first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
1 extra mod was pulled in by another dependency. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add BlockBrain without breaking your instance.
Built for BlockBrain-v1.0.0-1.21-1.21.1.jar on 1.21. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use BlockBrain-v1.0.0-1.21-1.21.1.jar. It targets 1.21, 1.21.1-Snapshot, 1.21.1 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Fabric API first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside BlockBrain-v1.0.0-1.21-1.21.1.jar. It opens that exact file at the source.
About this project
What does BlockBrain add?
BlockBrain
Overview
BlockBrain is a premium, seamlessly integrated AI companion built specifically for the Fabric ecosystem. Instead of relying on external browsers to query game mechanics, recipe sequences, or modification documentation, players can interface directly with an advanced AI framework native to the client runtime. Utilizing dynamic state injection, the engine actively reads environmental metrics to generate highly contextualized output without interrupting gameplay flow.
Key Features
- Context-Aware Intelligence — Continuously monitors and injects live game states (including current dimension, active gamemode, biome, and loaded modifications) into query payloads to ensure maximum accuracy and relevance.
- Asynchronous Engine Architecture — Operates on a non-blocking asynchronous networking layer, guaranteeing zero frame-time degradation or micro-stuttering during active query resolution.
- Native Modularity — Includes complimentary access to the BlockBrain Cloud infrastructure out-of-the-box, while fully supporting Custom API Key integration (BYOK) for OpenAI, Groq, and OpenRouter for power users.
- Dynamic Interface Design — Features a custom charcoal-and-blue minimalist aesthetic, complete with hardware-accelerated transition animations, a native markdown text renderer, and integrated toast notifications.
Installation Guide
- Dependency Verification: Ensure the target environment has the correct iteration of the Fabric API installed.
- Deployment: Place the compiled
BlockBrainbinary payload directly into your localmodsdirectory. - Initialization: Launch the runtime client (supported for versions 1.21 through 1.21.11).
- Interface Access: Press the
Right Shiftkey or execute the/blockbraincommand in chat to initialize the dashboard overlay.
Available exclusively for the Fabric Mod Loader ecosystem.
Project description from CurseForge.
Pick your setup
BlockBrain by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.11-snapshot
1 loader build1.21.11
1 loader build1.21.10
1 loader build1.21.9-snapshot
1 loader build1.21.9
1 loader build1.21.8
1 loader build1.21.7
1 loader build1.21.6-snapshot
1 loader build1.21.6
1 loader build1.21.5-Snapshot
1 loader build1.21.5
1 loader build1.21.4-Snapshot
1 loader buildShowing the newest 12 of 20 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
BlockBrain versions and loaders
BlockBrain-v1.0.0-1.21-1.21.1.jar
1 Jul 2026
Looking for an older file? The official CurseForge project page is in Resources.