Provides source code access through GitHub repository for direct installation.
Enables dynamic building of structures in Minecraft using JavaScript code within the buildSomething skill.
Support for macOS configuration paths for Claude Desktop integration.
Requires Node.js runtime environment for operation.
Available through npm package registry for installation.
Fundamental Labs/Minecraft Client
This library is the Client library for a Minecraft Game Skills and MCP Integration.
Fairies MCP Client (https://fairies.ai/) also supports direct connection with a single click.
Features
Full Minecraft Control: Connect AI agents to Minecraft servers and control bots
30 Verified Skills: Pre-built, tested skills for common Minecraft tasks
Flexible Connection: Connect to any Minecraft server with optional per-bot configuration
Multi-Bot Support: Manage multiple bots simultaneously
MCP Standard: Compatible with any MCP client (Claude Desktop, etc.)
Installation
Direct call via npx (Recommended)
Via npm (Recommended)
From Source
Usage
Starting the Server
You can start the MCP server with optional default connection settings:
Command Line Options
Integration with Claude Desktop or JSON configurations Locally
Add to your Claude Desktop configuration (~/Library/Application Support/Claude/claude_desktop_config.json
on macOS):
For remote installation (recommended)
If running locally from source:
Replace /path/to/minecraft-mcp
with the actual path where you cloned the repository.
Integration with Other MCP Clients
The server uses stdio transport and can be integrated with any MCP client:
Available Skills
Bot Management
joinGame - Spawn a new bot into the Minecraft game
username
(required): Bot's usernamehost
(optional): Server host (defaults to 'localhost' or command line option)port
(optional): Server port (defaults to 25565 or command line option)
leaveGame - Disconnect bot(s) from the game
username
(optional): Specific bot to disconnectdisconnectAll
(optional): Disconnect all bots if true
Movement & Navigation
goToSomeone - Navigate to another player
goToKnownLocation - Navigate to specific coordinates
runAway - Run away from threats
swimToLand - Swim to nearest land when in water
Combat & Hunting
attackSomeone - Attack players, mobs, or animals
hunt - Hunt animals or mobs
Resource Gathering
mineResource - Mine specific blocks or resources
harvestMatureCrops - Harvest mature crops from farmland
pickupItem - Pick up items from the ground
Crafting & Smelting
craftItems - Craft items using a crafting table
cookItem - Cook items in a furnace
smeltItem - Smelt items in a furnace
retrieveItemsFromNearbyFurnace - Get smelted items from furnace
Inventory Management
openInventory - Open the bot's inventory
equipItem - Equip armor, tools, or weapons
dropItem - Drop items from inventory
giveItemToSomeone - Give items to another player
Building & Farming
placeItemNearYou - Place blocks near the bot
prepareLandForFarming - Prepare land for farming
useItemOnBlockOrEntity - Use items on blocks or entities
Survival
eatFood - Eat food to restore hunger
rest - Rest to regain health
sleepInNearbyBed - Find and sleep in a bed
Storage
openNearbyChest - Open a nearby chest
Fun
dance - Make the bot dance
Vision
lookAround - Look around and observe the environment
Communication
readChat - Read recent chat messages from the server
sendChat - Send chat messages or commands to the server
Building
buildSomething - Build structures using Minecraft commands (requires cheats/operator permissions). Supports both static command arrays and dynamic JavaScript code.
buildPixelArt - Build pixel art from an image in Minecraft (requires cheats/operator permissions). Converts an image to pixel art using colored blocks. Maximum size is 256x256 blocks.
API Example
When integrated with an MCP client, you can control the bot like this:
Architecture
The MCP server:
Uses stdio transport for communication with AI clients
Dynamically loads skills from the verified skills directory
Manages multiple bot instances (currently uses the first bot for all operations)
Provides a unified interface for all bot actions
Requirements
Node.js >= 18.0.0
A Minecraft server (Java Edition) to connect to
An MCP-compatible client (like Claude Desktop)
Troubleshooting
"Skill implementation not found" Error
The MCP server needs to be run from the cloned repository with built skills. Make sure you:
Cloned the full repository
Ran
npm install
in the minecraft-client directoryRan
npm run build
in the minecraft-client directoryAre running the MCP server from the correct directory
Bot won't connect
Ensure your Minecraft server is running and accessible
Check that the port and host are correct
Verify the server allows the Minecraft version the bot uses
Skills not working
Make sure the bot has spawned successfully before using skills
Some skills require specific items or conditions
Check the bot's console output for error messages
Contributing
Contributions are welcome! Please feel free to submit a Pull Request.
License
MIT - see LICENSE file for details
Support
For issues and feature requests, please use the GitHub issue tracker.
Testing
To test with the Anthropic MPC inspector
'npx @modelcontextprotocol/inspector node ./dist/mcp-server.js'
hybrid server
The server is able to function both locally and remotely, depending on the configuration or use case.
A client library that connects AI agents to Minecraft servers, providing full game control with 30 verified skills for common tasks including movement, combat, crafting, and building.
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