Build and inspect Mutable Customizable Object graphs through Unreal Editor’s native Model Context Protocol (MCP) server. Mutable Graph Toolset lets AI assistants create assets, edit graphs, compile, configure instances and inspect rendered results.

What it does

• Create and save Customizable Objects and instances.

• Discover Mutable node classes; add, remove, inspect, refresh, import and export graph nodes.

• Connect pins using Mutable’s graph compatibility rules and read or set supported node properties.

• Configure child objects as selectable clothing, hair or body options.

• Compile with returned warnings and errors; list parameters and set instance values.

• Capture lit object and instance previews; inspect a texture’s R, G, B and A channels.

Requirements

Unreal Engine 5.8 on Windows. Enable Mutable, Toolset Registry and Model Context Protocol. Connect an HTTP MCP-compatible assistant to the native MCP server. This is an editor-only plugin. C++ source and detailed setup and usage documentation are included.

Documentation and setup guide

https://github.com/ITemre/MutableGraphToolset#readme

Validation

Built with UE 5.8 on Windows. 62 automation tests passed, including tests with expected diagnostic warnings. An end-to-end MCP workflow created an outfit group and child object, compiled it, created an instance, selected an option and rendered a preview.

Version 1.0 limitations

Mutable macro-library graphs and multidimensional parameters are not supported.