MCPBridge

MCPBridge

Connect Claude Code and Ollama to Roblox Studio and Blender via the Model Context Protocol

---

Claude Code (stdio)
      │ MCP protocol
      ▼
  MCP Server ──── HTTP :7842 ───► Roblox Studio Plugin (Lua)
      │
      ├──── HTTP :7843 ───► Blender Plugin (Python)
      │
      └── Ollama API (:11434) ──► minimax-m2.5:cloud

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⚙️ Prerequisites - Required for Everyone

These steps are required regardless of your platform or install method.

1 - Download the source

Click Code → Download ZIP at the top of this page and extract it somewhere on your machine.

Then grab the installer for your platform from the **Releases page**:

Windows Installer

macOS Installer

Place the installer in the same folder as the extracted source before continuing.

2 - Install Node.js via NVM

🪟 Windows

Download and run nvm-setup.exe from the nvm-windows releases page, then open a new terminal and run:

nvm install lts
nvm use lts

This installs the latest Node.js LTS release and sets it as your active version.

🍎 macOS

Install nvm by running the install script in your terminal:

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.3/install.sh | bash

Then restart your terminal (or run source ~/.zshrc), and run:

nvm install --lts
nvm use --lts
nvm alias default 'lts/*'

This installs the latest Node.js LTS release and sets it as your default.

3 - Install server dependencies

Navigate into the extracted folder and install dependencies:

cd MCPBridge/mcp-server
npm install

[!WARNING] Do not skip this step. Without it, the MCP server will not start and nothing will connect.

4 - Enable Studio as MCP Server

[!IMPORTANT] To enable the MCP server in Studio:

1. Open Assistant
2. Click ... → Manage MCP Servers
3. Turn on Enable Studio as MCP server

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🚀 Quick Install

🪟 Windows

1. Launch MCPBridge.exe
2. If index.js or OllamaMCP.lua weren't auto-detected, press Browse and select them manually
3. Click Apply Changes - this writes a single mcpbridge entry to your claude.json and installs the Roblox plugin automatically
4. Roblox Studio: click Launch Studio in the app, or open it manually
5. Blender: select your install from the dropdown and click Launch Blender, then install the addon once (see Blender Plugin Setup)
6. Exit MCPBridge, then launch Claude Code via Ollama:

    ollama launch claude --model minimax-m2.5:cloud

7. Start giving Claude prompts and watch it work!

🍎 macOS

[!NOTE] On first launch macOS may show a security warning. Go to System Settings → Privacy & Security and click Open Anyway to allow it.

1. Launch MCPBridge.pkg
2. If index.js or OllamaMCP.lua weren't auto-detected, press Browse and select them manually
3. Click Apply Changes - this writes a single mcpbridge entry to your claude.json and installs the Roblox plugin automatically
4. Roblox Studio: click Launch Studio in the app, or open it manually
5. Blender: select your install from the dropdown and click Launch Blender, then install the addon once (see Blender Plugin Setup)
6. Exit MCPBridge, then launch Claude Code via Ollama:

    ollama launch claude --model minimax-m2.5:cloud

7. Start giving Claude prompts and watch it work!

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🔌 Blender Plugin Setup

The Blender plugin is installed manually once directly inside Blender. You only need to do this the first time.

1. Open Blender
2. Go to Edit → Preferences → Add-ons
3. Click Install from Disk…
4. Select MCPBridge/blender-plugin/MCPBridge.py from the extracted source folder
5. Enable MCPBridge in the add-ons list

Once enabled, open any 3D Viewport, open the Sidebar (N key), go to the MCPBridge tab, and click Start Bridge. The status indicator will turn green when connected.

[!NOTE] The Blender plugin connects to localhost:7843. Make sure the MCPBridge MCP server is running (i.e. Claude Code has it active) before clicking Start Bridge.

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📦 Manual Setup

1 - Configure Claude Code

Add the MCP server to Claude Code's config. The config file lives at:

MCPBridge uses a single unified server that handles both Roblox and Blender. Add or merge one of the blocks below.

Option A - from npm (recommended). No source download or npm install is needed for the server; npx fetches and runs it:

{
  "mcpServers": {
    "mcpbridge": {
      "command": "npx",
      "args": ["-y", "@iamjrmh/mcpbridge"]
    }
  }
}

Option B - from local source. Use this if you cloned the repo and want to run your own copy (replace the path with your actual path):

{
  "mcpServers": {
    "mcpbridge": {
      "command": "node",
      "args": ["/absolute/path/to/MCPBridge/mcp-server/index.js"]
    }
  }
}

Then restart Claude Code. You should see mcpbridge in your MCP tools list with all Roblox and Blender tools available.

[!NOTE] The npm package @iamjrmh/mcpbridge contains the MCP server only. You still need the source's roblox-plugin/ and blender-plugin/ files to install the Studio and Blender plugins.

[!WARNING] If you have old roblox-ollama or blender-mcp entries in your claude.json from a previous version, remove them. Having multiple entries pointing at the same index.js will cause both to fail (port conflict on :7842). The MCPBridge app's Apply Changes button handles this migration automatically.

2 - Install the Roblox Studio Plugin

1. Open Roblox Studio
2. Go to Plugins → Plugin Folder (opens a folder in your file explorer)
3. Copy roblox-plugin/OllamaMCP.lua into that folder
4. Restart Roblox Studio
5. The "MCP Bridge" button appears in the Plugins toolbar

[!IMPORTANT] To enable the MCP server in Studio:

1. Open Assistant
2. Click ... → Manage MCP Servers
3. Turn on Enable Studio as MCP server

3 - Install the Blender Plugin

See Blender Plugin Setup above.

4 - Start Ollama

Pick a model and launch it with Ollama. The bridge calls the REST API at http://localhost:11434 automatically.

Recommended models:

# Balanced cloud model (default)
ollama launch claude --model minimax-m2.5:cloud

# Newer cloud model
ollama launch claude --model minimax-m2.7:cloud

# General purpose
ollama launch claude --model qwen3.5

# Coding focused
ollama launch claude --model qwen3-coder

# Lightweight / fast
ollama launch claude --model gemma4

5 - Connect everything

1. In Roblox Studio, click "MCP Bridge" in the toolbar - widget shows 🟢 Connected
2. In Blender, open the MCPBridge sidebar tab and click Start Bridge - status shows 🟢 Connected
3. Open Claude Code in your terminal
4. Start asking Claude to work on your Roblox scripts or Blender scene!

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🛠 Available MCP Tools

Studio Tools (Roblox)

Blender Tools

Ollama Tools

Prompts

Reusable, parameterised workflows exposed over MCP - invoke them from any MCP client.

Resources

Readable context data exposed over MCP - attach them to a conversation for live state.

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💬 Example Prompts

Roblox Studio:

"List all scripts in my Roblox game"

"Read the source of game.ServerScriptService.GameManager"

"Generate a Roblox Lua leaderboard system and write it to game.ServerScriptService.Leaderboard"

"Review game.StarterPlayer.StarterCharacterScripts.Movement for performance issues"

"Create a new LocalScript called 'UIHandler' in game.StarterPlayer.StarterPlayerScripts"

Blender:

"What objects are in my Blender scene?"

"Add a subdivided cube at the origin with 3 levels of subdivision"

"Generate a Python script to create a low-poly tree and execute it in Blender"

"Select all mesh objects in the scene and apply a smooth shading modifier"

"What is the current render engine and frame range?"

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🔧 Troubleshooting

Roblox plugin shows 🔴 Disconnected

• Make sure the MCP server is running (Claude Code must have it active)
• Confirm HTTP requests are enabled in Studio Settings
• Check that port 7842 isn't blocked by a firewall

Blender plugin shows 🔴 Disconnected

• Make sure the MCP server is running (Claude Code must have it active)
• Check that port 7843 isn't blocked by a firewall
• Confirm the MCPBridge addon is enabled in Edit → Preferences → Add-ons
• Try clicking Stop Bridge then Start Bridge again in the sidebar

Both plugins disconnected / MCP server won't start

This is almost always caused by having duplicate entries in claude.json (e.g. old roblox-ollama and blender-mcp entries both pointing at index.js). Two Node processes fighting over port 7842 causes both to fail.

Fix: Open MCPBridge, click Apply Changes. This replaces any old entries with a single mcpbridge entry. Then restart Claude Code.

Ollama errors

• Confirm Ollama is running: curl http://localhost:11434/api/tags
• Make sure minimax-m2.5:cloud is available in your Ollama setup

"Command timed out"

• The plugin may have been deactivated - click the toolbar/sidebar button again
• Check the plugin widget for error messages

🍎 macOS - "App can't be opened" security warning

macOS may block the installer on first launch since it isn't notarized. To allow it:

1. Go to System Settings → Privacy & Security
2. Scroll down and click Open Anyway next to MCPBridge
3. Confirm in the dialog that appears

Alternatively, right-click the .pkg and choose Open to bypass the warning directly.

🍎 macOS - mcp-server or roblox-plugin folder not found

On first launch, MCPBridge automatically extracts these folders next to the .pkg. If auto-detection still fails, use the Browse button in the app to point to them manually. The folders will be located next to MCPBridge.pkg in the same directory.

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📁 File Structure

MCPBridge/
├── mcp-server/
│   ├── index.js               ← Unified MCP + HTTP bridge server (Roblox :7842, Blender :7843)
│   └── package.json
├── roblox-plugin/
│   └── OllamaMCP.lua          ← Roblox Studio plugin (auto-installed by MCPBridge app)
├── blender-plugin/
│   └── MCPBridge.py           ← Blender addon (install manually via Edit → Preferences)
├── MCPBridge.exe              ← Windows installer (double-click to run)
├── MCPBridge.pkg              ← macOS installer (double-click to run)
├── claude_mcp_config.json     ← Example Claude Code config snippet
├── server.json                ← Official MCP Registry manifest
├── skills.md                  ← Agent skill guide (also served as the mcpbridge://guide resource)
├── start.sh                   ← Helper startup script
├── LICENSE                    ← MIT license
└── README.md

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📄 License

MCPBridge is released under the MIT License.