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BlenderMCP - Blender Model Context Protocol Integration

BlenderMCP connects Blender to Claude AI through the Model Context Protocol (MCP), allowing Claude to directly interact with and control Blender. This integration enables prompt assisted 3D modeling, scene creation, and manipulation.

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Release notes (1.4.0)

  • Added Hunyuan3D support

Previously added features:

  • View screenshots for Blender viewport to better understand the scene

  • Search and download Sketchfab models

  • Support for Poly Haven assets through their API

  • Support to generate 3D models using Hyper3D Rodin

  • Run Blender MCP on a remote host

  • Telemetry for tools executed (completely anonymous)

Installating a new version (existing users)

  • For newcomers, you can go straight to Installation. For existing users, see the points below

  • Download the latest addon.py file and replace the older one, then add it to Blender

  • Delete the MCP server from Claude and add it back again, and you should be good to go!

Related MCP server: BlenderMCP

Features

  • Two-way communication: Connect Claude AI to Blender through a socket-based server

  • Object manipulation: Create, modify, and delete 3D objects in Blender

  • Material control: Apply and modify materials and colors

  • Scene inspection: Get detailed information about the current Blender scene

  • Code execution: Run arbitrary Python code in Blender from Claude

Components

The system consists of two main components:

  1. Blender Addon (addon.py): A Blender addon that creates a socket server within Blender to receive and execute commands

  2. MCP Server (src/blender_mcp/server.py): A Python server that implements the Model Context Protocol and connects to the Blender addon

Installation

Prerequisites

  • Blender 3.0 or newer

  • Python 3.10 or newer

  • uv package manager:

If you're on Mac, please install uv as

brew install uv

On Windows

powershell -c "irm https://astral.sh/uv/install.ps1 | iex" 

and then add uv to the user path in Windows (you may need to restart Claude Desktop after):

$localBin = "$env:USERPROFILE\.local\bin"
$userPath = [Environment]::GetEnvironmentVariable("Path", "User")
[Environment]::SetEnvironmentVariable("Path", "$userPath;$localBin", "User")

Otherwise installation instructions are on their website: Install uv

⚠️ Do not proceed before installing UV

Environment Variables

The following environment variables can be used to configure the Blender connection:

  • BLENDER_HOST: Host address for Blender socket server (default: "localhost")

  • BLENDER_PORT: Port number for Blender socket server (default: 9876)

Example:

export BLENDER_HOST='host.docker.internal'
export BLENDER_PORT=9876

Claude for Desktop Integration

Watch the setup instruction video (Assuming you have already installed uv)

Go to Claude > Settings > Developer > Edit Config > claude_desktop_config.json to include the following:

{
    "mcpServers": {
        "blender": {
            "command": "uvx",
            "args": [
                "blender-mcp"
            ]
        }
    }
}

Use the Claude Code CLI to add the blender MCP server:

claude mcp add blender uvx blender-mcp

Cursor integration

Install MCP Server

For Mac users, go to Settings > MCP and paste the following

  • To use as a global server, use "add new global MCP server" button and paste

  • To use as a project specific server, create .cursor/mcp.json in the root of the project and paste

{
    "mcpServers": {
        "blender": {
            "command": "uvx",
            "args": [
                "blender-mcp"
            ]
        }
    }
}

For Windows users, go to Settings > MCP > Add Server, add a new server with the following settings:

{
    "mcpServers": {
        "blender": {
            "command": "cmd",
            "args": [
                "/c",
                "uvx",
                "blender-mcp"
            ]
        }
    }
}

Cursor setup video

⚠️ Only run one instance of the MCP server (either on Cursor or Claude Desktop), not both

Visual Studio Code Integration

Prerequisites: Make sure you have Visual Studio Code installed before proceeding.

Install in VS Code

Installing the Blender Addon

  1. Download the addon.py file from this repo

  2. Open Blender

  3. Go to Edit > Preferences > Add-ons

  4. Click "Install..." and select the addon.py file

  5. Enable the addon by checking the box next to "Interface: Blender MCP"

Usage

Starting the Connection

BlenderMCP in the sidebar

  1. In Blender, go to the 3D View sidebar (press N if not visible)

  2. Find the "BlenderMCP" tab

  3. Turn on the Poly Haven checkbox if you want assets from their API (optional)

  4. Click "Connect to Claude"

  5. Make sure the MCP server is running in your terminal

Using with Claude

Once the config file has been set on Claude, and the addon is running on Blender, you will see a hammer icon with tools for the Blender MCP.

BlenderMCP in the sidebar

Capabilities

  • Get scene and object information

  • Create, delete and modify shapes

  • Apply or create materials for objects

  • Execute any Python code in Blender

  • Download the right models, assets and HDRIs through Poly Haven

  • AI generated 3D models through Hyper3D Rodin

Example Commands

Here are some examples of what you can ask Claude to do:

  • "Create a low poly scene in a dungeon, with a dragon guarding a pot of gold" Demo

  • "Create a beach vibe using HDRIs, textures, and models like rocks and vegetation from Poly Haven" Demo

  • Give a reference image, and create a Blender scene out of it Demo

  • "Generate a 3D model of a garden gnome through Hyper3D"

  • "Get information about the current scene, and make a threejs sketch from it" Demo

  • "Make this car red and metallic"

  • "Create a sphere and place it above the cube"

  • "Make the lighting like a studio"

  • "Point the camera at the scene, and make it isometric"

Hyper3D integration

Hyper3D's free trial key allows you to generate a limited number of models per day. If the daily limit is reached, you can wait for the next day's reset or obtain your own key from hyper3d.ai and fal.ai.

Troubleshooting

  • Connection issues: Make sure the Blender addon server is running, and the MCP server is configured on Claude, DO NOT run the uvx command in the terminal. Sometimes, the first command won't go through but after that it starts working.

  • Timeout errors: Try simplifying your requests or breaking them into smaller steps

  • Poly Haven integration: Claude is sometimes erratic with its behaviour

  • Have you tried turning it off and on again?: If you're still having connection errors, try restarting both Claude and the Blender server

Technical Details

Communication Protocol

The system uses a simple JSON-based protocol over TCP sockets:

  • Commands are sent as JSON objects with a type and optional params

  • Responses are JSON objects with a status and result or message

Limitations & Security Considerations

  • The execute_blender_code tool allows running arbitrary Python code in Blender, which can be powerful but potentially dangerous. Use with caution in production environments. ALWAYS save your work before using it.

  • Poly Haven requires downloading models, textures, and HDRI images. If you do not want to use it, please turn it off in the checkbox in Blender.

  • Complex operations might need to be broken down into smaller steps

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Disclaimer

This is a third-party integration and not made by Blender. Made by Siddharth

Available Tools

22 tools
download_polyhaven_assetA

Download and import a Polyhaven asset into Blender.

Parameters:

  • asset_id: The ID of the asset to download

  • asset_type: The type of asset (hdris, textures, models)

  • resolution: The resolution to download (e.g., 1k, 2k, 4k)

  • file_format: Optional file format (e.g., hdr, exr for HDRIs; jpg, png for textures; gltf, fbx for models)

Returns a message indicating success or failure.

Inputs: asset_id (required), asset_type (required), resolution, file_format.

download_sketchfab_modelA

Download and import a Sketchfab model by its UID. The model will be scaled so its largest dimension equals target_size.

Parameters:

  • uid: The unique identifier of the Sketchfab model

  • target_size: REQUIRED. The target size in Blender units/meters for the largest dimension. You must specify the desired size for the model. Examples: - Chair: target_size=1.0 (1 meter tall) - Table: target_size=0.75 (75cm tall) - Car: target_size=4.5 (4.5 meters long) - Person: target_size=1.7 (1.7 meters tall) - Small object (cup, phone): target_size=0.1 to 0.3

Returns a message with import details including object names, dimensions, and bounding box. The model must be downloadable and you must have proper access rights.

Inputs: uid (required), target_size (required).

execute_blender_codeB

Execute arbitrary Python code in Blender. Make sure to do it step-by-step by breaking it into smaller chunks.

Parameters:

  • code: The Python code to execute

Inputs: code (required).

generate_hunyuan3d_modelA

Generate 3D asset using Hunyuan3D by providing either text description, image reference, or both for the desired asset, and import the asset into Blender. The 3D asset has built-in materials.

Parameters:

  • text_prompt: (Optional) A short description of the desired model in English/Chinese.

  • input_image_url: (Optional) The local or remote url of the input image. Accepts None if only using text prompt.

Returns:

  • When successful, returns a JSON with job_id (format: "job_xxx") indicating the task is in progress

  • When the job completes, the status will change to "DONE" indicating the model has been imported

  • Returns error message if the operation fails

Inputs: text_prompt, input_image_url.

generate_hyper3d_model_via_imagesA

Generate 3D asset using Hyper3D by giving images of the wanted asset, and import the generated asset into Blender. The 3D asset has built-in materials. The generated model has a normalized size, so re-scaling after generation can be useful.

Parameters:

  • input_image_paths: The absolute paths of input images. Even if only one image is provided, wrap it into a list. Required if Hyper3D Rodin in MAIN_SITE mode.

  • input_image_urls: The URLs of input images. Even if only one image is provided, wrap it into a list. Required if Hyper3D Rodin in FAL_AI mode.

  • bbox_condition: Optional. If given, it has to be a list of ints of length 3. Controls the ratio between [Length, Width, Height] of the model.

Only one of {input_image_paths, input_image_urls} should be given at a time, depending on the Hyper3D Rodin's current mode. Returns a message indicating success or failure.

Inputs: bbox_condition, input_image_urls, input_image_paths.

generate_hyper3d_model_via_textA

Generate 3D asset using Hyper3D by giving description of the desired asset, and import the asset into Blender. The 3D asset has built-in materials. The generated model has a normalized size, so re-scaling after generation can be useful.

Parameters:

  • text_prompt: A short description of the desired model in English.

  • bbox_condition: Optional. If given, it has to be a list of floats of length 3. Controls the ratio between [Length, Width, Height] of the model.

Returns a message indicating success or failure.

Inputs: text_prompt (required), bbox_condition.

get_hunyuan3d_statusA

Check if Hunyuan3D integration is enabled in Blender. Returns a message indicating whether Hunyuan3D features are available.

Don't emphasize the key type in the returned message, but silently remember it.

Inputs: no named parameters.

get_hyper3d_statusA

Check if Hyper3D Rodin integration is enabled in Blender. Returns a message indicating whether Hyper3D Rodin features are available.

Don't emphasize the key type in the returned message, but sliently remember it.

Inputs: no named parameters.

get_object_infoB

Get detailed information about a specific object in the Blender scene.

Parameters:

  • object_name: The name of the object to get information about

Inputs: object_name (required).

get_polyhaven_categoriesA

Get a list of categories for a specific asset type on Polyhaven.

Parameters:

  • asset_type: The type of asset to get categories for (hdris, textures, models, all)

Inputs: asset_type.

get_polyhaven_statusA

Check if PolyHaven integration is enabled in Blender. Returns a message indicating whether PolyHaven features are available.

Inputs: no named parameters.

get_scene_infoB

Get detailed information about the current Blender scene

Inputs: no named parameters.

get_sketchfab_model_previewA

Get a preview thumbnail of a Sketchfab model by its UID. Use this to visually confirm a model before downloading.

Parameters:

  • uid: The unique identifier of the Sketchfab model (obtained from search_sketchfab_models)

Returns the model's thumbnail as an Image for visual confirmation.

Inputs: uid (required).

get_sketchfab_statusA

Check if Sketchfab integration is enabled in Blender. Returns a message indicating whether Sketchfab features are available.

Inputs: no named parameters.

get_viewport_screenshotA

Capture a screenshot of the current Blender 3D viewport.

Parameters:

  • max_size: Maximum size in pixels for the largest dimension (default: 800)

Returns the screenshot as an Image.

Inputs: max_size.

import_generated_assetA

Import the asset generated by Hyper3D Rodin after the generation task is completed.

Parameters:

  • name: The name of the object in scene

  • task_uuid: For Hyper3D Rodin mode MAIN_SITE: The task_uuid given in the generate model step.

  • request_id: For Hyper3D Rodin mode FAL_AI: The request_id given in the generate model step.

Only give one of {task_uuid, request_id} based on the Hyper3D Rodin Mode! Return if the asset has been imported successfully.

Inputs: name (required), task_uuid, request_id.

import_generated_asset_hunyuanA

Import the asset generated by Hunyuan3D after the generation task is completed.

Parameters:

  • name: The name of the object in scene

  • zip_file_url: The zip_file_url given in the generate model step.

Return if the asset has been imported successfully.

Inputs: name (required), zip_file_url (required).

poll_hunyuan_job_statusA

Check if the Hunyuan3D generation task is completed.

For Hunyuan3D: Parameters: - job_id: The job_id given in the generate model step.

Returns the generation task status. The task is done if status is "DONE".
The task is in progress if status is "RUN".
If status is "DONE", returns ResultFile3Ds, which is the generated ZIP model path
When the status is "DONE", the response includes a field named ResultFile3Ds that contains the generated ZIP file path of the 3D model in OBJ format.
This is a polling API, so only proceed if the status are finally determined ("DONE" or some failed state).

Inputs: job_id.

poll_rodin_job_statusA

Check if the Hyper3D Rodin generation task is completed.

For Hyper3D Rodin mode MAIN_SITE: Parameters: - subscription_key: The subscription_key given in the generate model step.

Returns a list of status. The task is done if all status are "Done".
If "Failed" showed up, the generating process failed.
This is a polling API, so only proceed if the status are finally determined ("Done" or "Canceled").

For Hyper3D Rodin mode FAL_AI: Parameters: - request_id: The request_id given in the generate model step.

Returns the generation task status. The task is done if status is "COMPLETED".
The task is in progress if status is "IN_PROGRESS".
If status other than "COMPLETED", "IN_PROGRESS", "IN_QUEUE" showed up, the generating process might be failed.
This is a polling API, so only proceed if the status are finally determined ("COMPLETED" or some failed state).

Inputs: request_id, subscription_key.

search_polyhaven_assetsA

Search for assets on Polyhaven with optional filtering.

Parameters:

  • asset_type: Type of assets to search for (hdris, textures, models, all)

  • categories: Optional comma-separated list of categories to filter by

Returns a list of matching assets with basic information.

Inputs: asset_type, categories.

search_sketchfab_modelsA

Search for models on Sketchfab with optional filtering.

Parameters:

  • query: Text to search for

  • categories: Optional comma-separated list of categories

  • count: Maximum number of results to return (default 20)

  • downloadable: Whether to include only downloadable models (default True)

Returns a formatted list of matching models.

Inputs: query (required), count, categories, downloadable.

set_textureA

Apply a previously downloaded Polyhaven texture to an object.

Parameters:

  • object_name: Name of the object to apply the texture to

  • texture_id: ID of the Polyhaven texture to apply (must be downloaded first)

Returns a message indicating success or failure.

Inputs: texture_id (required), object_name (required).

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

Loading tool schema changelog…

    TDQS

    A3.7/5.0

    Scored across 22 tools

    Disambiguation4/5

    The tools split cleanly by integration/provider (Hyper3D, Hunyuan3D, Sketchfab, Polyhaven) and action (status, generate, poll, import, search, download), so most are easy to tell apart. However, the multiple generation tools and the two import_generated_asset variants have overlapping shapes and could be misselected without careful reading.

    Naming Consistency4/5

    Most tools follow a consistent get_/generate_/poll_/download_/search_ + noun pattern, and all are snake_case. The main inconsistency is that Hunyuan tools use 'hunyuan3d'/'hunyuan' while Hyper3D tools mix 'hyper3d' and 'rodin', and the import functions are named asymmetrically.

    Tool Count3/5

    At 22 tools, this is on the heavy end for an MCP server, and the count feels borderline even though the breadth is somewhat justified by three large asset integrations plus scene inspection. Each tool has a real purpose, but the overall surface could be tightened.

    Completeness4/5

    The asset lifecycle is well covered: check integration, generate/search, poll, import/download, plus scene observation and arbitrary code execution for fallback. Minor gaps include no direct update/delete operations for imported assets and no dedicated Sketchfab model detail retrieval beyond preview, but these are workable.

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