Beta Unreal Engine 5.4–5.7 Win64 · macOS · Linux

Editor Automation RPC Gateway

An Unreal Editor plugin that runs a local MCP server for AI-assisted editor workflows — let Claude Code, Cursor, Codex and other agents drive asset inspection, Blueprint authoring, widget work, materials, tests, logs, and project automation.

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Editor-only. Loopback-only by default. Proprietary, commercial software.

What it does

Asset management

Browse, inspect, import, duplicate, rename, and delete assets.

Actors & levels

Spawn actors, edit transforms, manage levels, inspect world state.

Blueprint tooling

Create, inspect, compile, decompile, and edit Blueprint graphs.

Graph text IRs

Round-trip text IRs for Blueprint, Material, Anim BP, Control Rig, Behavior Tree, Sound Cue, MetaSound, Niagara, and PCG.

UI & widgets

Inspect and author UMG widgets; export and import widget structure.

Materials & Niagara

Inspect and edit graph-oriented assets through structured RPCs.

System operations

Read logs, run editor commands, trigger build and test helper RPCs.

Screenshots & tests

Capture viewport and widget screenshots; run editor automation tests.

How it works

  1. Install the plugin into your project (or engine) and enable it.
  2. The editor runs a local MCP server at http://127.0.0.1:19880/mcp (per-project port).
  3. Point your AI agent — Claude Code, Cursor, Codex CLI, Gemini CLI, VS Code Copilot — at that endpoint.
  4. The agent works through a single call tool over ~1,200 namespaced RPCs.

Built for developers who want scripted or AI-driven control of editor tasks. The MCP endpoint is loopback-only by default — use it with trusted local tools.

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