Unreal_mcp

Package (npm 0.6.0-beta-a)

npx -y unreal-engine-mcp-server@0.6.0-beta-a

Or add to your MCP client config:

{
  "mcpServers": {
    "unreal_mcp": {
      "command": "npx",
      "args": [
        "-y",
        "unreal-engine-mcp-server@0.6.0-beta-a"
      ],
      "env": {
        "LOG_LEVEL": "<YOUR_VALUE>",
        "MCP_ROUTE_STDOUT_LOGS": "<YOUR_VALUE>",
        "UE_PROJECT_PATH": "<YOUR_VALUE>",
        "UE_EDITOR_EXE": "<YOUR_VALUE>",
        "UE_SCREENSHOT_DIR": "<YOUR_VALUE>",
        "MCP_AUTOMATION_PORT": "<YOUR_VALUE>",
        "MCP_AUTOMATION_HOST": "<YOUR_VALUE>",
        "MCP_AUTOMATION_ALLOW_NON_LOOPBACK": "<YOUR_VALUE>",
        "MCP_AUTOMATION_CLIENT_MODE": "<YOUR_VALUE>",
        "MCP_AUTOMATION_USE_TLS": "<YOUR_VALUE>",
        "MCP_CONNECTION_TIMEOUT_MS": "<YOUR_VALUE>",
        "MCP_REQUEST_TIMEOUT_MS": "<YOUR_VALUE>",
        "MCP_AUTOMATION_MAX_MESSAGES_PER_MINUTE": "<YOUR_VALUE>",
        "MCP_AUTOMATION_MAX_AUTOMATION_REQUESTS_PER_MINUTE": "<YOUR_VALUE>"
      }
    }
  }
}

• LOG_LEVEL — Logging level: debug, info, warn, error (default: info)
• MCP_ROUTE_STDOUT_LOGS — Route standard output to standard error to avoid protocol corruption (default: true)
• UE_PROJECT_PATH — Absolute path to your Unreal .uproject file
• UE_EDITOR_EXE — Path to UnrealEditor-Cmd.exe (optional)
• UE_SCREENSHOT_DIR — Directory to save screenshots (optional)
• MCP_AUTOMATION_PORT — Automation bridge WebSocket port (default: 8091)
• MCP_AUTOMATION_HOST — Automation bridge WebSocket host (default: 127.0.0.1). Set to 0.0.0.0 for LAN access (requires MCP_AUTOMATION_ALLOW_NON_LOOPBACK=true)
• MCP_AUTOMATION_ALLOW_NON_LOOPBACK — SECURITY: Allow binding to non-loopback addresses (e.g., 0.0.0.0) for LAN access. Only enable if you understand the security implications. (default: false)
• MCP_AUTOMATION_CLIENT_MODE — Run as client connecting to UE (false) or server listening for UE (true) (default: false)
• MCP_AUTOMATION_USE_TLS — Use wss:// for the automation bridge client connection (default: false)
• MCP_CONNECTION_TIMEOUT_MS — Connection timeout in milliseconds (default: 5000)
• MCP_REQUEST_TIMEOUT_MS — Request timeout in milliseconds (default: 30000)
• MCP_AUTOMATION_MAX_MESSAGES_PER_MINUTE — Max inbound automation bridge messages per minute before disconnect (default: 600)
• MCP_AUTOMATION_MAX_AUTOMATION_REQUESTS_PER_MINUTE — Max inbound automation request messages per minute before disconnect (default: 120)