Our grade: 4 checks
Based on public data, not a full audit. See how we grade. Something changed? Request a re-grade.
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Write a reviewWhy it got a C
This is Epic's own server, not a community project: the Unreal MCP plugin ships inside Unreal Editor and the Epic repo here is the Claude Code plugin (skills and a session hook) that drives it. Enable the Unreal MCP and All Toolsets plugins, and it serves Streamable HTTP on 127.0.0.1:8000/mcp with hundreds of tools across actors, Blueprints, materials, Niagara, Sequencer and automation tests. Epic's docs label it Experimental. Biggest deduction: there is no authentication, so any local process can call the editor's tools, and execute_tool_script runs arbitrary Python in the editor with full project access; Epic leaves tool approval to the client, so keep approvals on, don't use --dangerously-skip-permissions, and commit your project first. The engine source is not public, so only the plugin repo's maintenance could be checked.
How to connect
/plugin install unreal-engine-skills-for-claude-code@claude-plugins-officialIs Unreal MCP (Epic Games, in Unreal Editor) safe?
Is Unreal MCP (Epic Games, in Unreal Editor) safe to use?
Unreal MCP (Epic Games, in Unreal Editor) grades C (usable with care). There is no login: anything that can start or reach it gets its full access. Upkeep is hard to verify (closed source or a single maintainer), so pin the version you tested. It runs locally over stdio, so it acts with your machine's access.
Does Unreal MCP (Epic Games, in Unreal Editor) have known vulnerabilities?
Not in our current data: it has no open CVEs or advisories. We re-check as new ones are published.
Does Unreal MCP (Epic Games, in Unreal Editor) support authentication?
No. It has no login of its own, so limit who and what can start it.
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