UE_MCP Plugins

Ported Unreal Engine MCP from 5.8 to 5.7 (eventually will do earlier versions too) along with most toolkists.

Engine: UE 5.7. Several plugins are backports of UE 5.8 APIs so the suite runs on 5.7. See BlueprintGraphEditorPort and JsonUtilitiesSchema.

Repository layout

This repository's root is an Unreal Plugins/ directory. Drop it into a project (or engine) Plugins/ folder, or clone it directly as YourProject/Plugins/UE_MCP.

Core plugins

Plugin	Description
ModelContextProtocol	Anthropic MCP server implementation for Unreal Engine. The entry point for the suite.
ToolsetRegistry	Editor-only registry that discovers and exposes toolsets to the MCP server. Depends on PythonScriptPlugin, EditorScriptingUtilities, and FileSandbox.
FileSandbox	Core functionality for sandboxing file access in the editor.
Terminal	Native Slate terminal emulator.
SemanticSearch	Early work-in-progress semantic search system for assets. Currently disabled on 5.7 — see Not yet ported.

UE 5.8 backports (for running on 5.7)

Plugin	Description
BlueprintGraphEditorPort	Backport of UE 5.8's UBlueprintGraphEditor / FBlueprintGraphPin graph-authoring API. Exposes unreal.BlueprintGraphEditor / unreal.BlueprintGraphPin used by EditorToolset's blueprint.py.
JsonUtilitiesSchema	Backport of UE 5.8's JSON Schema generator (FJsonSchemaGenerator / FJsonSchemaGeneratorEditor) used across the MCP/Toolset suite.

Toolsets

The Toolsets directory holds the individual tool-call packages. AllToolsets is an aggregator plugin that depends on every toolset below.

Status legend: ✅ ported & enabled · ⚠️ enabled, but some advanced tools require 5.8 and no-op on 5.7 · ❌ not ported (disabled on 5.7) — see Not yet ported.

Toolset	Area	Status
AIModuleToolset	AI / behavior	✅
AnimationAssistantToolset	Animation	✅
AutomationTestToolset	Automation tests	✅
ChaosClothAssetToolset	Chaos Cloth	⚠️ 3 cloth-conversion tools require 5.8
ConfigSettingsToolset	Config / settings	✅
ConversationToolset	Conversation flow	✅
DataRegistryToolset	Data Registry	✅
DataflowAgent	Dataflow	⚠️ node add/remove, asset-create & template-list require 5.8
EditorToolset	Editor & core types (Blueprints, Actors, Properties, …)	✅ ¹
GASToolsets	Gameplay Ability System	✅
GameFeaturesToolset	Game Features	✅
GameplayTagsToolset	Gameplay Tags	✅
LiveCodingToolset	Live Coding	✅
MCPClientToolset	MCP client	✅
MVVMToolset	MVVM / data binding	✅
MetaHumanGenerator	MetaHuman	✅ (asset-dependent)
NiagaraToolsets	Niagara VFX	❌ not ported
PCGToolset	Procedural Content Generation	⚠️ 2 tools require 5.8 (DataView, instant-graph execution)
PhysicsToolsets	Physics	✅
PluginToolset	Plugin management	✅
SemanticSearchToolset	Semantic search	❌ not ported
SequencerAnimMixerToolset	Sequencer anim mixing	❌ not ported
SlateInspectorToolset	Slate inspection	✅
StateTreeToolset	StateTree	✅
UMGToolSet	UMG / Slate UI	✅ (5.8 FWidgetBlueprintOperationUtils reimplemented as a compat layer)
WorldConditionsToolset	World Conditions	✅

¹ EditorToolset: 13 tools that referenced 5.8-only Python types (StringTable, SimpleCurveKey, K2Node_CreateDelegate) are restored on 5.7 via C++ shims in BlueprintGraphEditorPort. CurveTable set_keys / get_keys use a small CurveKey ustruct in place of 5.8's SimpleCurveKey (an Array-of-Map signature isn't a valid reflected type on 5.7).

Not yet ported (disabled on 5.7)

These three are disabled in the .uproject and cannot be enabled on a stock (launcher / binary) UE 5.7 install. Each is blocked by engine-internal code — not plugin code — so a plugin-level backport can't reach it. Re-enabling any of them requires a source-built engine (or the specific engine pieces below).

Toolset	Why it's blocked	What it needs
NiagaraToolsets	Built entirely on the 5.8-only NiagaraExternalSystemEditorUtilities, which depends on NiagaraEditor Internal/ headers (NiagaraStackQuery.h, NiagaraStackEntryEnumerable.h) and on symbols not exported by 5.7's prebuilt NiagaraEditor (e.g. FNiagaraScriptMergeManager, several FNiagaraStackGraphUtilities methods). No subset is salvageable — see NiagaraToolsets/PORT_NOTES_5_7.md.	A from-source UE engine so Niagara can be recompiled with the needed headers public and symbols exported.
SequencerAnimMixerToolset	5.7's shipped MovieSceneAnimMixer plugin lacks the 5.8 MovieSceneAnimMixerScripting module and the …Layer / …TransitionSection / …DecorationContainer UClasses the tools annotate, so the Python package can't even import.	The full 5.8 MovieSceneAnimMixer plugin + its AnimNext / MovieScene-runtime dependencies (trends toward full 5.8 engine source).
SemanticSearch + SemanticSearchToolset	The core depends on the engine-level FAISS ThirdParty module (FAISS + OpenBLAS libs), which is not present anywhere reachable (only a 5.8 engine install ships it). The 5.8 ContentBrowser search-override API is also absent in 5.7 (editor-UI only; the MCP query tools don't need it).	Either Engine/Source/ThirdParty/FAISS/ from a 5.8 install, or a from-scratch FAISS-free vector index (Flat L2). Embeddings already use an OpenAI HTTP API, so no local model is needed.

Engine rebuild constraint: if the engine cannot be rebuilt, NiagaraToolsets and SequencerAnimMixerToolset are not achievable on 5.7 by any plugin-level means. SemanticSearch is the only one of the three that could be made to work without an engine rebuild (by replacing FAISS with an in-engine index).

Licensing: this suite is a backport of Epic's NoRedist engine code. It is fine for local / private use, but the ported Epic code must not be redistributed (publicly or privately, free or paid) — that violates the UE EULA. Only your own original shims + a patch that each recipient applies to their own legitimately-obtained engine source is shareable.

How to install

Download the zip, extract it, and copy all of the plugin folders into a Plugins/ directory in one of these two locations:

• Per project — copy the folders into your project's Plugins/ folder (next to your .uproject), so each plugin lives at:

  YourProject/Plugins/<PluginName>/...
  

  If your project doesn't have a Plugins/ folder yet, create one. Existing plugins in that folder are left untouched.

• Per engine — copy the folders into your engine install's Engine/Plugins/ folder, so each plugin lives at:

  <UE install>/Engine/Plugins/<PluginName>/...
  

  (e.g. C:\Program Files\Epic Games\UE_5.7\Engine\Plugins\). Installing here makes the suite available to every project that uses that engine.

Use the per-project location if you only want these plugins in one project; use the per-engine location to share them across all of your projects.

After copying the files:

1. Enable the ModelContextProtocol plugin (and AllToolsets, or the specific toolsets you need) in your project's plugin settings.
2. Ensure PythonScriptPlugin is enabled — toolsets are Python-backed.
3. Regenerate project files and build the editor target.

Prefer Git? You can instead clone this repository directly into your project's Plugins/ directory:

git clone https://github.com/thecodebrozilla/UE_MCP.git Plugins/UE_MCP

Requirements

• Unreal Engine 5.7
• PythonScriptPlugin and EditorScriptingUtilities enabled

Notes

• Build artifacts (Binaries/, Intermediate/, Saved/, DerivedDataCache/, __pycache__/) are ignored via .gitignore. Because the repo root is the Plugins/ folder, the ignore rules use **/-anchored patterns to catch artifacts inside each plugin subdirectory.
• Several plugins are marked experimental / NoRedist.