unreal-engine-mcp

{
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "name": "io.github.ChiR24/unreal-engine-mcp",
  "description": "Automate the Unreal Editor (UE 5.0-5.8): levels, Blueprints, UI, materials, VFX and more.",
  "repository": {
    "url": "https://github.com/ChiR24/Unreal_mcp.git",
    "source": "github"
  },
  "version": "0.6.0-beta-e",
  "packages": [
    {
      "registryType": "npm",
      "registryBaseUrl": "https://registry.npmjs.org",
      "identifier": "unreal-engine-mcp-server",
      "version": "0.6.0-beta-e",
      "transport": {
        "type": "stdio"
      },
      "environmentVariables": [
        {
          "description": "Your Unreal project folder or its .uproject file. The server reads the capability token from <project>/Saved/MCP/capability-token and the WebSocket port from the project settings.",
          "isRequired": true,
          "format": "filepath",
          "placeholder": "C:/Users/YourName/Documents/Unreal Projects/MyGame",
          "name": "UE_PROJECT_PATH"
        },
        {
          "description": "Capability token to present to the editor. Only needed when the server cannot read the project folder, for example over LAN.",
          "isSecret": true,
          "name": "MCP_AUTOMATION_CAPABILITY_TOKEN"
        },
        {
          "description": "Editor WebSocket port. Default: the first Listen Ports entry in the project settings, else 8090.",
          "format": "number",
          "placeholder": "8090",
          "name": "MCP_AUTOMATION_PORT"
        },
        {
          "description": "Editor host to connect to. A LAN address also needs MCP_AUTOMATION_ALLOW_NON_LOOPBACK=true and Allow Non Loopback in the plugin settings.",
          "default": "127.0.0.1",
          "name": "MCP_AUTOMATION_HOST"
        },
        {
          "description": "SECURITY: allow a non-loopback MCP_AUTOMATION_HOST. Enable only on a trusted network.",
          "format": "boolean",
          "default": "false",
          "name": "MCP_AUTOMATION_ALLOW_NON_LOOPBACK"
        },
        {
          "description": "Connect with wss:// instead of ws://.",
          "format": "boolean",
          "default": "false",
          "name": "MCP_AUTOMATION_USE_TLS"
        },
        {
          "description": "Extra content roots to allow besides /Game, /Engine, /Script, /Temp and /Niagara, comma-separated. Example: /MyPluginContent/",
          "name": "MCP_ADDITIONAL_PATH_PREFIXES"
        },
        {
          "description": "How long to wait for the editor connection, in milliseconds.",
          "format": "number",
          "default": "5000",
          "name": "MCP_CONNECTION_TIMEOUT_MS"
        },
        {
          "description": "Overrides every per-capability request timeout, in milliseconds. Leave unset: each capability gets a budget that fits its cost.",
          "format": "number",
          "name": "MCP_REQUEST_TIMEOUT_MS"
        },
        {
          "description": "Inbound messages per minute from the editor before the server disconnects.",
          "format": "number",
          "default": "600",
          "name": "MCP_AUTOMATION_MAX_MESSAGES_PER_MINUTE"
        },
        {
          "description": "Log level. Logs go to stderr.",
          "default": "info",
          "choices": [
            "debug",
            "info",
            "warn",
            "error"
          ],
          "name": "LOG_LEVEL"
        }
      ]
    }
  ]
}