MCP Unreal Server: Zero-Lag Remote Control for Unreal Devs

MCP Unreal Server bridges Python & Unreal Engine, letting devs remotely control instances with zero lag – perfect for stress-testing or live prototyping without messy workarounds." )

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About MCP Unreal Server

What is MCP Unreal Server: Zero-Lag Remote Control for Unreal Devs?

MCP Unreal Server is a powerhouse tool designed to give Unreal Engine developers seamless, lag-free remote control over their projects. Think of it as a Swiss Army knife for distributed development, enabling you to execute Python scripts, monitor node health, and manage instances without leaving your IDE. Its core magic lies in real-time multicast discovery and LSP-integrated resource tracking—perfect for teams juggling complex game engine workflows.

How to Use MCP Unreal Server: Step-by-Step Guide

Installation Setup

      
        # Clone the repo & install essentials
        git clone https://github.com/your-org/mcp-unreal-server.git
        pip install -r requirements.txt

Configuration Tweaks

Adjust multicast settings in server.py to your network's vibe:

      
        config.multicast_group_endpoint = ("239.0.0.1", 6766)  # Your secret sauce here

Launch & Connect

      
        # Boot the server
        python -m src.mcp_server_unreal.server
        
        # Example JSON payload for code execution
        {
          "node_id": "your_engine_instance",
          "code": "print('Debugging made easy!')",
          "unattended": true
        }

MCP Unreal Server Features

Key Features of MCP Unreal Server

Instance Management

Automagically spots all Unreal nodes in your network, tracks resource usage via LSP, and keeps a heartbeat on their health status. Perfect for distributed dev setups.

Remote Execution Flexibility

Switch between "attended" (interactive) and "unattended" (fire-and-forget) modes. Whether you're running full scripts or quick evals, it handles it with zero delay.

Logging Nirvana

Granular control over debug levels, dual logging to console/file, and health monitoring that keeps your dev sanity intact. Every hiccup gets logged in mcp_unreal.log.

Use Cases of MCP Unreal Server

Real-Time Collaboration: Let artists/programmers tweak scripts simultaneously without passing around .uproject files.
Automated Testing: Run headless tests across multiple Unreal instances to stress-test physics systems or AI behaviors.
Remote Debugging: Diagnose issues on distant servers without SSH-ing into your render farm.
CI/CD Pipelines: Integrate with your favorite DevOps tools for lightning-fast build validation.

MCP Unreal Server FAQ

FAQ: Troubleshooting & Tips

Why no nodes show up?

Double-check the MCP plugin is enabled in your Unreal projects. Multicast might also be blocked by overly-protective firewalls.

Execution timing out?

90% of the time, it's a firewall issue. Check port 6766 isn't being throttled. Also verify JSON syntax—those pesky commas matter!

How to boost performance?

Lower the log verbosity to INFO unless debugging. For large projects, consider using the MODE_EVAL_STATEMENT for lightweight checks.

Content

MCP Unreal Server

A server implementation for interacting with Unreal Engine instances through remote Python execution.

Features

🚀 Unreal Instance Management
- Automatic discovery of Unreal nodes via multicast
- Real-time node status monitoring
- Resource listing through LSP-compatible clients
💻 Remote Execution
- Execute Python code in Unreal Engine environments
- Support for both attended and unattended execution modes
- File execution and statement evaluation modes
📊 Logging & Monitoring
- Detailed logging to file (mcp_unreal.log)
- Console logging with different verbosity levels
- Node connection health monitoring

Installation

# Clone repository
git clone https://github.com/your-org/mcp-unreal-server.git
cd mcp-unreal-server

# Install dependencies
pip install -r requirements.txt

Configuration

Network Settings

Configure multicast parameters in RemoteExecutionConfig:

# Default multicast settings (modify in server.py)
config.multicast_group_endpoint = ("239.0.0.1", 6766)

Logging

Modify logging configuration in server.py:

# Adjust log levels
file_handler.setLevel(logging.DEBUG)  # File logging
console_handler.setLevel(logging.INFO)  # Console logging

Usage

Starting the Server

python -m src.mcp_server_unreal.server

Supported Tools

Connect to Unreal Instance

{
  "host": "239.0.0.1",
  "port": 6766
}

Execute Python Code

{
  "node_id": "<unreal-node-id>",
  "code": "print('Hello Unreal')",
  "unattended": true
}

API Documentation

Resource Format

types.Resource(
    uri="unreal://<node_id>",
    name=f"Unreal Instance: {node_id}",
    description="Unreal Engine instance",
    mimeType="application/x-unreal"
)

Execution Modes

Mode	Description
MODE_EXEC_FILE	Execute Python file
MODE_EXEC_STATEMENT	Execute Python statement
MODE_EVAL_STATEMENT	Evaluate Python expression

Troubleshooting

Common Issues:

No nodes discovered: Verify Unreal instances are running with MCP plugin
Execution timeout: Check firewall settings for multicast traffic
Connection drops: Monitor mcp_unreal.log for node status changes

License

Apache-2.0 License

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