unreal-mcp-ue4
NPM · UNREAL-MCP-UE4
UE4.27 MCP server for controlling Unreal Editor sessions over Python Remote Execution.
Available components
Last scanned (4 hours ago)
Scores higher than 35% of npm servers
Category Developer Tools
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security81
- No malware found by supply-chain analysis.Pass
- CVE check failed: a known high-severity CVE affects zod 3.25.76, a direct dependency. A fixed version is available. View diagnostics → Fail
- No install/post-install scripts declared.Pass
- 30 of 94 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 177 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability35
- 0% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Fail
- AI-judged instruction clarity (fair).Partial
- Tool/resource definitions use about 2266 tokens (~64/item across 35 items; 34 tools + 1 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management77
- Stability observed for 23 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 99% of tool parameters carry a description.Partial
Tool Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "editor_delete_object" implies "delete" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
- An AI judge read all 35 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 5 Nov 26 −3
- Stability: pass → 0.77 functional
- 30 Oct 26 0
- Stability: 0.97 → pass security
- 29 Oct 26 0
- Stability: pass → 0.97 functional
- 24 Oct 26 −5
- CVE-2023-54404 affects this package: high ▼ security
- Known CVEs: pass → fail ▼ security
- 23 Oct 26 0
- Stability: 0.97 → pass security
- 22 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 21 Oct 26 −1
- Stability: pass → 0.93 functional
- 17 Oct 26 +3
- Stability: 0.77 → pass security
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Analysed npm/unreal-mcp-ue4@2026.4.1-2
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Vulnerabilities 1 finding
| ID | CVE | Severity | Vector | Fix available |
|---|---|---|---|---|
| GHSA-mrhx-c7xc-m3w5 | CVE-2023-54404 | high | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | yes |
Background: What a vulnerability scan can and cannot prove →
Dependencies 94 packages
| Packages resolved | 94 |
|---|---|
| Stale | 30 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
editor_create_object ~279
Create a new object/actor in the world Example output: {'success': true, 'actor_name': 'StaticMeshActor_1', 'actor_label': 'MyCube', 'class': 'StaticMeshActor', 'location': {'x': 100.0, 'y': 200.0, 'z': 0.0}, 'rotation': {'pitch': 0.0, 'yaw': 45.0, 'roll': 0.0}, 'scale': {'x': 1.0, 'y': 1.0, 'z': 1.0}} Returns created actor details with final transform values.
| Name | Type | Req | Description |
|---|---|---|---|
| location | object | – | World position coordinates |
| object_class | string | yes | Unreal class name (e.g., 'StaticMeshActor', 'DirectionalLight') |
| object_name | string | yes | Name/label for the created object |
| properties | object | – | Additional actor properties. For StaticMeshActor: use 'StaticMesh' for mesh path, 'Material' for single material path, or 'Materials' for array of material paths. Example: {"StaticMesh": "/Game/Meshe… |
| rotation | object | – | Rotation in degrees |
| scale | object | – | Scale multipliers |
No output schema declared.
No examples provided.
editor_delete_object ~114
Delete an object/actor from the world Example output: {'success': true, 'message': 'Successfully deleted actor: MyCube', 'deleted_actor': {'actor_name': 'StaticMeshActor_1', 'actor_label': 'MyCube', 'class': 'StaticMeshActor', 'location': {'x': 100.0, 'y': 200.0, 'z': 0.0}}} Returns deletion confirmation with details of the deleted actor.
| Name | Type | Req | Description |
|---|---|---|---|
| actor_names | string | yes | – |
No output schema declared.
No examples provided.
editor_update_object ~277
Update an existing object/actor in the world Example output: {'success': true, 'actor_name': 'StaticMeshActor_1', 'actor_label': 'UpdatedCube', 'class': 'StaticMeshActor', 'location': {'x': 150.0, 'y': 200.0, 'z': 50.0}, 'rotation': {'pitch': 0.0, 'yaw': 90.0, 'roll': 0.0}, 'scale': {'x': 2.0, 'y': 2.0, 'z': 2.0}} Returns updated actor details with new transform values.
| Name | Type | Req | Description |
|---|---|---|---|
| actor_name | string | yes | Name or label of the actor to update |
| location | object | – | New world position coordinates |
| new_name | string | – | New name/label for the actor |
| properties | object | – | Additional actor properties to update. For StaticMeshActor: use 'StaticMesh' for mesh path, 'Material' for single material path, or 'Materials' for array of material paths. Example: {"StaticMesh": "/… |
| rotation | object | – | New rotation in degrees |
| scale | object | – | New scale multipliers |
No output schema declared.
No examples provided.
get_unreal_engine_path ~24
Get the active Unreal Engine root path from the connected editor session
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
get_unreal_project_path ~24
Get the active Unreal project file path from the connected editor session
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
get_unreal_version ~23
Get the active Unreal Engine version string from the connected editor session
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
manage_actor ~53
Actor tool namespace for listing, searching, spawning, deleting, transforming, and inspecting level actors.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_actor |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_animation_physics ~58
Animation-and-physics tool namespace for physics Blueprint spawning, Blueprint physics settings, and Blueprint compilation actions.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_animation_physics |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_asset ~52
Asset tool namespace for list, search, info, references, export, and validation actions.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_asset |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_audio ~52
Audio tool namespace for importing audio files, searching audio assets, and inspecting their asset metadata.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_audio |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_behavior_tree ~51
Behavior-tree tool namespace for creating, searching, and inspecting BehaviorTree assets.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_behavior_tree |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_blueprint ~54
Blueprint tool namespace for Blueprint creation, component editing, compilation, and basic Blueprint summary actions.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_blueprint |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_data ~53
Data tool namespace for searching data assets, creating common data containers, and inspecting their asset metadata.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_data |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_editor ~59
Editor tool namespace for Python execution, console commands, project inspection, map inspection, PIE control, screenshots, and camera control.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_editor |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_effect ~55
Effects tool namespace for spawning debug-shape actors, assigning materials, tinting them, and deleting them.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_effect |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_environment ~53
Environment-building tool namespace for preset town, arch, staircase, pyramid, and maze generation actions.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_environment |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_gas ~52
GAS tool namespace for searching gameplay-ability-related assets and inspecting their asset metadata.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_gas |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_geometry ~50
Geometry tool namespace for wall, arch, staircase, and pyramid preset construction actions.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_geometry |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_input ~45
Input tool namespace for creating classic UE4 input mappings.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_input |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_inspection ~52
Inspection tool namespace for asset, actor, map, and basic Blueprint summary actions.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_inspection |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_level ~55
Level tool namespace for map inspection, actor listing, world outliner inspection, and preset structure creation actions.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_level |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_level_structure ~60
Level-structure tool namespace for preset town, house, mansion, tower, wall, bridge, and fortress construction actions.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_level_structure |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_lighting ~54
Lighting tool namespace for spawning common light actors, transforming them, and inspecting level lighting state.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_lighting |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_material ~57
Material tool namespace for listing materials, applying them to actors or Blueprints, and tinting them with material instances.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_material |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_navigation ~49
Navigation tool namespace for spawning navigation volumes and proxies plus basic map inspection actions.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_navigation |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_sequence ~48
Sequence tool namespace for creating, searching, and inspecting LevelSequence assets.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_sequence |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_skeleton ~52
Skeleton tool namespace for searching Skeleton and SkeletalMesh assets and inspecting their metadata.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_skeleton |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_source_control ~51
Source-control tool namespace for provider inspection and file or package source-control operations.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_source_control |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_splines ~57
Spline tool namespace for spawning a spline-host actor or Blueprint and then transforming or deleting it.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_splines |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_system ~45
System tool namespace for console commands and asset validation actions.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_system |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_texture ~54
Texture tool namespace for searching texture assets, importing image files as textures, and reading their asset metadata.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_texture |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_tools ~62
Tool-namespace registry for listing registered tool namespaces and describing supported actions. Use this as the discovery entry point for the namespace-first MCP surface.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_tools |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_volumes ~51
Volume tool namespace for spawning common engine volumes and applying delete or transform actions.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_volumes |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
manage_widget ~87
Widget tool namespace for UMG Blueprint creation, widget-tree edits, and viewport spawning actions. Use add_child_widget for typical nested layout work under an existing root such as CanvasPanel_0; add_widget without parent_widget_name is only for assigning a new root widget.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | Action to execute inside tool namespace manage_widget |
| params | object | – | Optional action parameter object |
No output schema declared.
No examples provided.
How do I install the unreal-mcp-ue4 server?
unreal-mcp-ue4 runs locally as an npm package, launched with npx -y unreal-mcp-ue4. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · unreal-mcp-ue4
claude mcp add conaman-unreal-mcp-ue4 -- npx -y unreal-mcp-ue4
What is the unreal-mcp-ue4 server?
unreal-mcp-ue4 is listed in the public MCP registry as io.github.conaman/unreal-mcp-ue4. UE4.27 MCP server for controlling Unreal Editor sessions over Python Remote Execution. This page covers its npm package (unreal-mcp-ue4).
Is the unreal-mcp-ue4 server safe to use?
unreal-mcp-ue4 scores 67 out of 100 on VerifyMCP. We recorded 1 known advisory against it as of 5 November 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the unreal-mcp-ue4 server expose?
unreal-mcp-ue4 exposes 34 tools: get_unreal_engine_path, get_unreal_project_path, get_unreal_version, editor_create_object, editor_update_object, and 29 more. Their descriptions and schemas cost roughly 2,262 tokens of context every time the server is loaded.
Is the unreal-mcp-ue4 server still maintained?
unreal-mcp-ue4 is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the unreal-mcp-ue4 server under?
unreal-mcp-ue4 declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.