dcc-mcp-blender 0.1.3

Blender addon for the DCC Model Context Protocol (MCP) ecosystem — embeds a Streamable HTTP MCP server directly inside Blender

dcc-mcp-blender

Blender addon for the DCC Model Context Protocol (MCP) ecosystem — embeds a Streamable HTTP MCP server directly inside Blender, letting any MCP-compatible AI client drive your 3D workflow.

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Overview

dcc-mcp-blender turns Blender into a first-class MCP server. Once the addon is enabled, any MCP client (Claude Desktop, custom agents, etc.) can call Blender tools over HTTP without any external gateway.

┌─────────────────────────────────┐
│  Blender (Python 3.10+)         │
├─────────────────────────────────┤
│  dcc_mcp_blender                │
│  ├─ BlenderMcpServer            │
│  ├─ SkillCatalog (50+ skills)   │
│  ├─ ActionRegistry              │
│  └─ HTTP Handlers               │
├─────────────────────────────────┤
│  dcc-mcp-core                   │
│  ├─ McpHttpServer               │
│  ├─ JSON-RPC 2.0                │
│  └─ SSE Streaming               │
└─────────────────────────────────┘
         ↓ http://127.0.0.1:8765/mcp
┌─────────────────────────────────┐
│  MCP Host (Claude / etc.)       │
└─────────────────────────────────┘

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Features

• Embedded MCP server — no external gateway needed; the server runs inside Blender's Python interpreter
• 50+ pre-built skills — scene management, object manipulation, materials, rendering, scripting and more
• Extensible skill system — drop new skill folders alongside built-ins or point to them via env vars
• Main-thread host adapter — BlenderHost drives dispatcher ticks through bpy.app.timers or a background loop
• Streamable HTTP transport — compatible with any MCP 2025-03-26 client
• Claude Desktop ready — ship a one-line mcpServers config and you're done

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Available MCP Tools

Category	Tools
blender-scene	new_scene, open_scene, save_scene, list_objects, get_scene_info, get_session_info
blender-objects	create_object, delete_object, duplicate_object, move_object, rotate_object, scale_object, list_objects
blender-mesh	create_mesh, apply_modifier, subdivide_mesh, extrude_faces, merge_vertices
blender-materials	create_material, assign_material, set_material_color, list_materials, delete_material
blender-render	render_scene, set_render_settings, set_camera, get_render_info
blender-scripting	execute_python, execute_script_file, get_blender_info
blender-animation	set_keyframe, delete_keyframe, set_frame_range, get_frame_range, bake_action
blender-lighting	create_light, delete_light, set_light_properties, list_lights
blender-camera	create_camera, set_active_camera, set_camera_properties, list_cameras
blender-collection	create_collection, link_to_collection, unlink_from_collection, list_collections
blender-geometry	create_sphere, save_blend, file_exists, export_fbx, export_obj

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Installation

Option 1 — Install as Blender Addon (ZIP)

1. Download the latest platform ZIP from the Releases page: dcc_mcp_blender_addon_win64_vX.Y.Z.zip, dcc_mcp_blender_addon_linux_vX.Y.Z.zip, or dcc_mcp_blender_addon_macos_vX.Y.Z.zip
2. In Blender 4.2+: Edit → Preferences → Extensions → Install from Disk… → select the ZIP
3. Enable DCC MCP Blender
4. The MCP server starts automatically on http://127.0.0.1:8765

Release ZIPs include blender_manifest.toml and the matching dcc-mcp-core wheel under wheels/, so Blender installs the Python dependency into the extension's isolated environment.

The addon ZIP is assembled by packaging/assemble_zip.py. It resolves the latest compatible dcc-mcp-core wheel, places it under wheels/, and injects that wheel into blender_manifest.toml; Blender 4.2+ then installs it through the extension wheel mechanism instead of relying on global pip packages or sys.path edits.

Option 2 — Install via pip (for scripts / CI)

pip install dcc-mcp-blender

Then in Blender's Python console:

import dcc_mcp_blender
dcc_mcp_blender.start_server()

Headless Bootstrap

For CI or automation that needs Blender's main thread dispatcher:

blender --background --python src/dcc_mcp_blender/blender_bootstrap.py

The bootstrap prints MCP_URL=..., discovers bundled skills, and drives BlenderHost in headless mode until the process is stopped.

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Quick Start

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "blender": {
      "url": "http://127.0.0.1:8765/mcp"
    }
  }
}

Make sure the Blender addon is enabled and the server is running, then restart Claude Desktop.

Python API

import dcc_mcp_blender

# Start the server (default port 8765)
dcc_mcp_blender.start_server()

# Stop the server
dcc_mcp_blender.stop_server()

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Development

git clone https://github.com/loonghao/dcc-mcp-blender
cd dcc-mcp-blender
pip install -e ".[dev]"
pytest

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License

MIT — see LICENSE for details.