Imagine shaping a scene in Unreal Engine and having a conversation open beside it. You describe what you want to explore, ask for help understanding what is in the project, and review a proposed change before deciding whether it belongs. With Hermes Agent connected to an Unreal Editor MCP server, that kind of chat-led workflow can be possible—while you remain the designer making the decisions.
This is less like installing a magic button inside Unreal and more like bringing a tool-using assistant into your creative process. Hermes is where the conversation happens. A community MCP server such as UEMCP can connect that conversation to selected tools in an open Unreal Editor project. It is a third-party integration, not a built-in Unreal Engine or Hermes feature, and DVARQ has not validated it as a studio workflow.
A conversation around the work
A useful session begins with a concrete question, not a broad command. You might ask the assistant to inspect the current scene, help locate an object, or explain what it can see before you make a change. The assistant can then describe a possible next step. You decide whether to try it, and you inspect the result in the editor.
The rhythm is collaborative: orient, discuss, try a small change, review, and refine. Rather than handing over an entire project, keep each request narrow. Ask for a plan first when a task could affect assets or scene structure. Make one change at a time, then check the live project yourself.
What the workflow can feel like
- Start with the open project. You work in Unreal as usual, with the project loaded in the editor.
- Ask in everyday language. In Hermes, describe a question or a small task. The assistant can use the connected tools to gather information from the editor, depending on the server’s capabilities.
- Discuss before changing. Ask what it plans to do and what parts of the project may be affected. You can narrow or correct the request before any action.
- Test a reversible step. Try a visible, limited change in a copy or source-controlled project. Avoid starting with important assets or destructive operations.
- Review in Unreal. Inspect the result in the editor and decide whether to keep, revise, or undo it. A screenshot or tool response can help, but it does not replace checking the project.
The benefit to explore is not that the assistant takes over creative judgment. It is that a natural-language conversation may make some editor interactions easier to describe, inspect, and iterate on—provided the connected tools support the task and the user reviews the outcome.
Where the assistant lives
In this setup, the chat remains in Hermes. MCP carries tool requests between Hermes and a separate local bridge, which can communicate with the open editor. The assistant is therefore not automatically a docked chat panel inside Unreal. A native in-editor panel would be a separate product feature.
UEMCP is one open-source route for this connection. Its setup uses Unreal’s editor-side Python remote-execution feature. Exact steps and engine compatibility can vary by release; the project’s setup guide, README, and release notes do not give identical version ranges. Check the specific UEMCP release against the Unreal version you plan to use rather than assuming every UE5 build is supported.
Begin carefully
Try the workflow on a disposable or source-controlled project first. Start with a connection check or another read-only request, then move to a small action you can easily inspect and reverse. Keep a person involved in changes to assets, Blueprints, saves, deletions, and other consequential operations. Ask for a clear explanation of what changed and verify it in the editor.
Security is part of the workflow
UEMCP’s security notes warn that Unreal’s remote-execution protocol has no authentication and that Python can run inside the editor without sandboxing. Treat the connection as powerful access to the open project—not as a harmless chat feature. Keep network exposure local, use a controlled workstation and source control, and do not enable remote access on a network you do not control. Review the server’s current security documentation before connecting a project.
Hermes and an Unreal MCP server can offer a conversational way to work with editor tools, but the experience depends on which tools are available, how the connection is configured, and how carefully changes are reviewed. It is best approached as an assistant to a designer’s workflow: useful to explore, bounded by the project’s safeguards, and always subject to human judgment.