nova3d-mcp 0.1.2

Nova3D MCP server — structured, part-aware 3D generation for AI agents

nova3d-mcp

Structured, part-aware 3D generation for AI agents.

nova3d-mcp is an MCP server that exposes Nova3D's generation pipeline as a callable tool inside Claude Code, Cursor, and any MCP-compatible agent.

One tool call. A washing machine comes back with named drum, door, control panel, and hose connectors — separately editable, not fused into a blob.

---

Why Nova3D

Every major AI 3D generator today produces mesh blobs — a single fused object that looks plausible in a render and collapses the moment you try to edit, rig, or pipeline it.

Nova3D is different. Instead of diffusion → mesh, it runs:

prompt / image
      ↓
LLM writes Blender Python construction code
      ↓
headless Blender executes + validates + repairs
      ↓
structured GLB — named parts, intact hierarchy, real joints

The result is a 3D asset that survives contact with real workflows: game engines, configurators, robotics simulations, AR scenes. Parts have names. Hierarchy is intact. Joints are real. You can change one component without regenerating everything.

---

Quickstart

1. Get an API key

Sign in at nova3d.xyz, go to Settings → API Keys, and create a key.

export NOVA3D_TOKEN="n3d_your-api-key-here"

API keys never expire unless revoked. The MCP server validates your key on startup and prints a clear error if it's missing or invalid.

2. Configure Your Agent

You can run nova3d-mcp directly using uvx (recommended) or by installing from source.

Option A: Running via PyPI (Recommended)

Add this to your agent's configuration file (e.g., claude_desktop_config.json):

{
  "mcpServers": {
    "nova3d": {
      "command": "uvx",
      "args": ["nova3d-mcp"],
      "env": {
        "NOVA3D_TOKEN": "n3d_your-api-key-here"
      }
    }
  }
}

Option B: Installing from Source

Clone the repository and install the package locally:

git clone https://github.com/RareSense/nova3d-mcp.git
cd nova3d-mcp
python3.10 -m venv .venv && source .venv/bin/activate
pip install .

Then add this to your agent's configuration file:

{
  "mcpServers": {
    "nova3d": {
      "command": "nova3d-mcp",
      "env": {
        "NOVA3D_TOKEN": "n3d_your-api-key-here"
      }
    }
  }
}

3. Generate

Pass a prompt like this to your AI agent:

Generate a vending machine with separate door, glass panel, coin slot,
button grid, frame, and interior shelving. Use Google Gemini with my
API key AIza...

The agent calls generate_3d. You get back:

{
  "glb_url": "https://nova3d.xyz/assets/abc123.glb",
  "preview_url": "https://nova3d.xyz/preview/state-...",
  "parts": ["door", "glass_panel", "coin_slot", "button_grid", "frame", "shelf_1", "shelf_2"],
  "joint_count": 1,
  "code_artifact": { ... },
  "workflow_id": "state-..."
}

Open preview_url in your browser — interactive Three.js viewer, named parts, orbit controls, part explosion. No Blender required to preview.

---

Tools

generate_3d

Generate a structured 3D asset from text (and optional reference image).

Parameter	Type	Required	Description
prompt	string	✓	Asset description. Be specific about parts.
provider	string	✓	"google" · "anthropic" · "openai"
api_key	string	✓	Your BYOK key for the provider
llm	string		Model ID. Defaults to recommended per provider.
image_base64	string		Reference image as plain base64
image_mime	string		e.g. "image/jpeg"

---

regenerate_part

Regenerate one named part without rebuilding the whole asset.

Parameter	Type	Required	Description
code_artifact	object	✓	From prior generate_3d result
part_type	string	✓	Part name e.g. "door", "handle"
description	string	✓	What the new part should look like
provider	string	✓	LLM provider
api_key	string	✓	BYOK key
llm	string		Model ID

Finding part names: Open the preview_url from your generation — each mesh is labeled. Use that exact name as part_type.

---

add_part

Add a new component to an existing asset.

Parameter	Type	Required	Description
code_artifact	object	✓	From prior generation result
description	string	✓	Description of the new part and where it goes
provider	string	✓	LLM provider
api_key	string	✓	BYOK key
llm	string		Model ID

---

articulate_model

Add joints, hinges, or rotational articulation to an existing asset.

Parameter	Type	Required	Description
code_artifact	object	✓	From prior generation result
model_url	string	✓	glb_url from prior generation
articulation_request	string	✓	What should move and how
provider	string	✓	LLM provider
api_key	string	✓	BYOK key
llm	string		Model ID
selected_meshes	list		Specific mesh names to articulate

---

get_generation_status

Check the status of a running workflow by ID.

Parameter	Type	Required	Description
workflow_id	string	✓	From any prior generation tool

---

Typical workflow

1. generate_3d("robot dog with four legs, head, torso, and tail")
   → glb_url, preview_url, parts, code_artifact

2. Open preview_url in browser
   → see named parts, identify what needs changing

3. regenerate_part(code_artifact, part_type="head", description="...")
   → updated glb_url, new preview_url

4. articulate_model(code_artifact, model_url, "make legs rotate at hip joints")
   → glb_url with working joints

---

Provider reference

Provider	provider	Default llm	Notes
Google Gemini	google	gemini-2.0-flash	Recommended
Anthropic	anthropic	claude-sonnet-4-20250514	Strong reasoning
OpenAI	openai	gpt-4o	Widely available

---

Environment variables

Variable	Required	Description
NOVA3D_TOKEN	✓	API key from nova3d.xyz → Settings → API Keys (recommended) or session JWT
NOVA3D_API_URL		Override API base URL (default: https://nova3d.xyz/api)

---

How it differs from blender-mcp

blender-mcp (21.9k ★) gives AI agents a remote control for a locally running Blender instance. It requires Blender installed, produces unstructured output, and inherits all the bpy hallucination problems of raw LLM → Blender code generation.

nova3d-mcp is different in kind:

	blender-mcp	nova3d-mcp
Blender required	Yes	No
Output	Unstructured scene	Named, hierarchical GLB
Validation	None	Server-side repair loop
Part awareness	No	Yes — named, addressable
Joints	Manual scripting	First-class output
Hosted backend	No	Yes

---

Contributing

Issues, PRs, and workflow feedback welcome. github.com/RareSense/nova3d-mcp

Community Discord: discord.gg/QEH8mzcwdR

---

License

MIT — see LICENSE