Unreal_mcp MCP — Cas d'usage, Installer & Démo en direct

Pourquoi l'utiliser

Fonctionnalités clés

36 tools covering the main editor surface areas
Native C++ Automation Bridge — not a scripting hack
Supports UE 5.0 through 5.7, Windows/macOS/Linux
Optional GraphQL endpoint for custom clients

Démo en direct

Aperçu en pratique

unreal.replay ▶ prêt

0/0

Installer

Choisissez votre client

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "unreal": {
      "command": "TODO",
      "args": [
        "See README: https://github.com/ChiR24/Unreal_mcp"
      ],
      "_inferred": true
    }
  }
}

Ouvrez Claude Desktop → Settings → Developer → Edit Config. Redémarrez après avoir enregistré.

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "unreal": {
      "command": "TODO",
      "args": [
        "See README: https://github.com/ChiR24/Unreal_mcp"
      ],
      "_inferred": true
    }
  }
}

Cursor utilise le même schéma mcpServers que Claude Desktop. La config projet l'emporte sur la globale.

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "unreal": {
      "command": "TODO",
      "args": [
        "See README: https://github.com/ChiR24/Unreal_mcp"
      ],
      "_inferred": true
    }
  }
}

Cliquez sur l'icône MCP Servers dans la barre latérale Cline, puis "Edit Configuration".

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "unreal": {
      "command": "TODO",
      "args": [
        "See README: https://github.com/ChiR24/Unreal_mcp"
      ],
      "_inferred": true
    }
  }
}

Même format que Claude Desktop. Redémarrez Windsurf pour appliquer.

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "unreal",
      "command": "TODO",
      "args": [
        "See README: https://github.com/ChiR24/Unreal_mcp"
      ]
    }
  ]
}

Continue utilise un tableau d'objets serveur plutôt qu'une map.

~/.config/zed/settings.json

{
  "context_servers": {
    "unreal": {
      "command": {
        "path": "TODO",
        "args": [
          "See README: https://github.com/ChiR24/Unreal_mcp"
        ]
      }
    }
  }
}

Ajoutez dans context_servers. Zed recharge à chaud à la sauvegarde.

claude mcp add unreal -- TODO 'See README: https://github.com/ChiR24/Unreal_mcp'

Une seule ligne. Vérifiez avec claude mcp list. Supprimez avec claude mcp remove.

Cas d'usage

Usages concrets : Unreal_mcp

How to prototype an Unreal level from natural language

👤 Indie devs, level designers iterating fast ⏱ ~20 min intermediate

Quand l'utiliser : You want to rough-in a scene without clicking through content browser menus.

Prérequis

Unreal Engine 5.x project with McpAutomationBridge plugin enabled — Copy plugins/McpAutomationBridge into your project's Plugins folder, restart editor
UE_PROJECT_PATH env var — Absolute path to your .uproject file

Déroulement

Spawn the basics

Create a new empty level 'Prototype_01'. Spawn a ThirdPersonCharacter at origin, a DirectionalLight at 30° pitch, and a floor plane.✓ Copié

→ Level saved with the three actors
Populate props

Scatter 20 instances of StaticMesh_Tree in a 50m radius. Add SkySphere with a sunset preset.✓ Copié

→ Visible trees + sunset atmosphere
Enter PIE to playtest

Start Play In Editor and capture a screenshot after 3 seconds.✓ Copié

→ Screenshot showing the running scene

Résultat : A playable whitebox scene in under 10 minutes.

Pièges

Plugin version mismatch with UE version — Rebuild the plugin against your exact UE version; check UBT output
Port 8091 already in use — Set MCP_AUTOMATION_PORT to a free port in both env and plugin settings

Combiner avec : filesystem

Edit Unreal Blueprint graphs from Claude conversationally

👤 Gameplay programmers ⏱ ~15 min advanced

Quand l'utiliser : You need to add a simple node or variable without breaking flow from coding.

Déroulement

Identify the target BP

List all Blueprints under /Game/Characters. Return paths.✓ Copié

→ List
Add a node

In BP_PlayerCharacter, add a PrintString node connected to BeginPlay, text 'Hello from MCP'.✓ Copié

→ BP recompiles cleanly; PIE shows the text

Résultat : Small BP changes without alt-tabbing.

Pièges

BP compile errors silently fail — Always ask for the compile log after an edit

Automate Unreal marketing screenshots across camera angles

👤 Marketing, community managers ⏱ ~15 min intermediate

Quand l'utiliser : You need 10 beauty shots of your game for a trailer or press kit.

Déroulement

Define camera positions

Given these 10 transforms [list], move the editor camera to each and capture a 4K screenshot.✓ Copié

→ 10 PNGs in ./Saved/Screenshots
Batch rename

Rename them to <level>_<angle>_<timestamp>.png✓ Copié

→ Clean filenames

Résultat : Press-kit-ready screenshots in minutes.

Combiner avec : filesystem

Combinaisons

Associez-le à d'autres MCPs pour un effet X10

unreal + filesystem

Store procedurally generated level definitions as JSON, rebuild levels from them

Read ./levels/forest.json, create a new UE level and spawn the actors described.✓ Copié

unreal + claude-talk-to-figma

HUD mockups in Figma → Widget Blueprint in UE

Export the selected HUD frame from Figma; recreate the layout in a UMG Widget Blueprint in my UE project.✓ Copié

Outils

Ce que ce MCP expose

Outil	Entrées	Quand appeler
manage_asset	action: import\|duplicate\|delete\|rename, path, params	Asset CRUD
control_actor	action: spawn\|destroy\|move\|set_prop, class, transform	Scene composition
control_editor	action: pie_start\|pie_stop\|screenshot\|set_camera	Editor-level ops
manage_level	action: new\|save\|load\|stream, name	Level lifecycle
manage_blueprint	action: create\|add_node\|compile, bp_path	BP editing
manage_sequence	action: create\|add_track\|play, sequence	Cinematics
system_control	action: console\|build\|test, args	Project-level automation

Coût et limites

Coût d'exécution

Quota d'API: None — local
Tokens par appel: 100–2000 per tool
Monétaire: Free; requires Unreal Engine (also free up to thresholds)
Astuce: Batch operations inside a single transaction — single undo entry and faster

Sécurité

Permissions, secrets, portée

Stockage des identifiants : None

Sortie de données : Localhost only (MCP_AUTOMATION_PORT)

Dépannage

Erreurs courantes et correctifs

Plugin not found / editor crashes on load

Rebuild against current UE version: right-click .uproject → Generate Project Files → rebuild in IDE

Vérifier : Plugin shows as 'Enabled' in Edit → Plugins

Automation port refused

Ensure UE editor is running and the plugin has started its listener (check Output Log for 'MCP bridge listening')

Vérifier : telnet 127.0.0.1 8091

Asset import fails silently

Check UE's Message Log — many errors surface there but not to MCP

Alternatives

Unreal_mcp vs autres

Alternative	Quand l'utiliser	Compromis
UE Python scripting	You want direct Python control and don't need an agent layer	No MCP, no LLM-friendly surface
Blender MCP	You're in Blender not Unreal	Different engine entirely

Plus

Ressources

📖 Lire le README officiel sur GitHub

🐙 Voir les issues ouvertes

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