OpenForge MCP

Talk to your AI. It controls Unity and Blender. Free.

What makes this different

The AI can see what it built

Existing tools return text like "success". OpenForge lets the AI take a screenshot, evaluate the result, and fix problems on its own.

You: "Build a city scene"
  -> AI: Places buildings
  -> AI: Takes screenshot, reviews it
  -> AI: "The buildings are too close together. Adjusting spacing."
  -> AI: Fixes it automatically

Blender and Unity in one conversation

Model in Blender, optimize, import to Unity, place in scene. All in a single conversation. No manual export/import, no switching apps.

"Make a shield model in Blender, optimize the mesh,
 import it into Unity, and attach it to the Player's left hand"

"Save" and "Undo" without knowing Git

Version control that feels like save points in a game.

"Save the project"        -> auto Git commit
"It broke, go back"       -> instant restore
"Show me my save history" -> formatted changelog

AI plays your game and finds bugs

The AI enters Play Mode, simulates input, and reports errors and performance issues.

"Playtest the game and tell me what's wrong"
  -> AI: Runs the game, simulates input
  -> AI: "NullReferenceException on landing.
         FPS drops below 30 near x:100."

| Unity | Blender | |-------|---------| | Unity demo | Blender demo |

Core features

Free forever -- MIT license. No subscriptions. No paywalls.
350+ tools -- Scene, GameObject, Material, Script, Mesh, Animation, Physics, UI, Lighting, Camera, Terrain, VFX, Rendering, and more.
One command to get started -- auto-detects your AI client and writes the config. No JSON editing.
Stays efficient in long sessions -- loads tool details on demand, so context stays clean.
Supported AI clients -- Claude Desktop / Cursor / VS Code / Claude Code CLI / Gemini CLI / LM Studio / Ollama

Getting Started

1. Install

npx openforge-mcp setup

2. Add the plugin

Unity: Import the package, open Tools > OpenForge > Setup.

Blender: Edit > Preferences > Add-ons > Install, select the zip, enable it.

3. Talk to your AI

"Set up ragdoll physics on the character"

See the Getting Started guide for full details.

Say this, get that

| What you want | What you say | |---------------|-------------| | Build a scene | "Create a ruined city with 5 damaged buildings" | | Cross-app | "Make a chair in Blender and place it in the Unity room" | | Materials | "Create a neon glow material and apply it to the sign" | | Physics | "Add rigidbodies to the crates and stack them up" | | AI fix loop | "Adjust the lighting. Keep checking the screenshot until it looks right" | | Version control | "Save the project" / "Go back 3 saves" | | Script generation | "Write an AI script that makes enemies chase the player" | | Playtesting | "Run the game and check for bugs" |

Docs

Documentation site: https://hirorogo.github.io/openforge-mcp/

| Guide | Description | |-------|-------------| | Introduction | Overview and unique features | | Installation | From Node.js to first connection | | First Steps | Your first AI command | | Scene Building | Build an old bookshop alley from scratch | | Blender Modeling | Create a street lamp and export it | | Blender to Unity | Cross-app pipeline tutorial | | Save and Restore | Version control without Git knowledge | | VRChat World | Build a seaside cafe terrace | | Tool Reference | All Unity / Blender / Godot tools | | Game Studios Integration | Integration with Claude Code Game Studios | | Contributing | How to submit PRs and add tools |

Roadmap

v0.1.0 (current)

[x] 350+ tools (Unity + Blender)
[x] AI sees the scene and self-corrects (Visual Feedback)
[x] "Save" / "Restore" with automatic version control
[x] Blender-to-Unity pipeline
[x] Works with all major AI clients

v1.0.0

[ ] AI playtesting (run the game, find bugs)
[ ] Recipe system (complex workflows in one shareable command)
[ ] Plugin API for community tool extensions

Future

[ ] AI asset generation (text-to-3D, text-to-texture)
[ ] Web dashboard for remote monitoring
[ ] Godot Engine support

Build from source

git clone https://github.com/hirorogo/openforge-mcp.git
cd openforge-mcp
pnpm install && pnpm build

License

MIT

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