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Mcp Minecraft

Mcp Minecraft

Created by arjunkmrm•2 days ago
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Other / Misc

Minecraft MCP Integration

A Model Context Protocol (MCP) integration for Minecraft that enables AI assistants to interact with a Minecraft server. This integration allows AI models to observe and interact with the Minecraft world through a bot.

Prerequisites

  1. Minecraft Launcher
  2. Node.js 18 or higher
  3. Claude Desktop App
  4. Java 21.0.5 (recommended)

⚠️ Note: Currently only tested on macOS/Linux. Windows compatibility is not guaranteed.

Important Note

  1. Use the F3+P Shortcut: Press F3 + P together. This toggles the “Pause on Lost Focus” feature. Once turned off, you can switch to claude desktop and Minecraft will continue running without pausing.

  1. Connection Issues on Claude Restart: If you restart Claude while the Minecraft server is running, you may experience MCP connection issues on the next claude launch due to lingering java process. See Troubleshooting: MCP Connection Failed for resolution steps.

Installation Steps

  1. Download and Setup Minecraft Server

    • Download Minecraft server v1.21 from mcversions.net/1.21
    • Install Java 21.0.5 if not already installed (other versions are untested)
    • Create a dedicated directory (e.g., ~/minecraft-server/)
    • Place the downloaded server.jar file in this directory
    • Note down the absolute path to your server.jar file
  2. Install and Configure MCP Integration

    Quick Install (Recommended):

    npx -y @smithery/cli install mcp-minecraft --client claude
    

    Follow the CLI prompts to complete the setup.

    Or Manual Setup:

    • Navigate to ~/Library/Application Support/Claude/claude_desktop_config.json
    • Add the MCP server configuration:
    {
      "mcpServers": {
        "mcp-minecraft": {
          "command": "npx",
          "args": [
            "-y",
            "mcp-minecraft@latest",
            "--server-jar",
            "/absolute/path/to/minecraft-server/server.jar"
          ]
        }
      }
    }   
    

    ⚠️ Replace /absolute/path/to/minecraft-server/server.jar with your actual server.jar path

  3. Launch Claude Desktop

    • Start Claude Desktop after completing the configuration
  4. Connect to Server

    • Open Minecraft Launcher
    • Install and launch Minecraft Java Edition v1.21
    • Click “Play” and Select “Multiplayer”
    • Click “Add Server”
    • Enter server details:
      • Server Name: Minecraft Server
      • Server Address: localhost:25565
    • Click “Done”

Features

Resources

The integration exposes these MCP resources:

  • minecraft://bot/location - Current bot position in the world
  • minecraft://bot/status - Bot connection status

Tools

Available MCP tools:

  • chat - Send chat messages to the server
  • jump - Make the bot jump
  • moveForward - Make the bot move forward
  • moveBack - Make the bot move backward
  • turnLeft - Make the bot turn left
  • turnRight - Make the bot turn right
  • placeBlock - Place a block at specified coordinates
  • digBlock - Break a block at specified coordinates
  • getBlockInfo - Get information about a block at specified coordinates
  • selectSlot - Select a hotbar slot (0-8)
  • getInventory - Get contents of bot’s inventory
  • equipItem - Equip an item by name to specified destination
  • getStatus - Get bot’s current status (health, food, position, etc.)
  • getNearbyEntities - Get list of nearby entities within range
  • attack - Attack a nearby entity by name
  • useItem - Use/activate the currently held item
  • stopUsingItem - Stop using/deactivate the current item
  • lookAt - Make the bot look at specific coordinates
  • followPlayer - Follow a specific player
  • stopFollowing - Stop following current target
  • goToPosition - Navigate to specific coordinates

Technical Details

  • Server runs in offline mode for local development
  • Default memory allocation: 2GB
  • Default port: 25565
  • Bot username: MCPBot

Troubleshooting

Common Issues

  1. MCP Connection Failed

    • Look for lingering Java processes
    • Terminate them manually:
      • Windows: Use Task Manager (untested)
      • Mac/Linux:
        • Go to ‘Activity Monitor’ and ‘Force Quit’ java
    • Restart computer if process termination fails
    • Note: Latest version should auto-resolve these issues
  2. Server Won’t Start

    • Verify Java is installed
    • Check server.jar path is correct
    • Ensure port 25565 is available
  3. Can’t Connect to Server

    • Verify server is running (check logs)
    • Confirm you’re using “localhost” as server address
    • Check firewall settings

Logs Location

  • Minecraft Server logs: Check the minecraft-server directory
  • Claude Desktop logs: ~/Library/Logs/Claude/mcp*.log

Contributing

Contributions, big or small, are welcome!

License

This project is licensed under the MIT License - see the LICENSE{:target=“_blank”} file for details.

Prerequisites

  • •Familiarity with the server domain
  • •Basic understanding of related technologies
  • •Knowledge of Other / Misc

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Details

Created

June 17, 2025

Last Updated

June 17, 2025

Category

Other / Misc

Author

arjunkmrm

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