Flux Cloudflare MCP

A powerful Model Context Protocol (MCP) server that provides AI assistants with the ability to generate images using Black Forest Labs' Flux model via a Cloudflare Worker API.

Installation • Features • Usage • Documentation • Contributing

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🌟 Features

- 🖼️ High-Quality Image Generation: Access to Flux, a state-of-the-art image generation model
- 🤖 Seamless AI Integration: Enable AI assistants like Claude to generate images directly
- 🎛️ Customizable Parameters: Control aspect ratio, inference steps, and more
- 🔌 MCP Compatible: Works with any MCP client (Cursor, Claude Desktop, Cline, Zed, etc.)
- 🔒 Local Processing: All requests are processed securely through the Cloudflare Worker
- 💬 Chat Completions: Get text completions using the same API

📦 Installation

Direct Usage with NPX

FLUX_API_TOKEN=your_token FLUX_API_URL=your_api_url npx -y flux-cloudflare-mcp

From Source

# Clone the repository
git clone https://github.com/Hzzy2O/flux-cloudflare-mcp.git
cd flux-cloudflare-mcp
Install dependencies
npm install
Build the project
npm run build

🚀 Setting Up Your Flux API

This MCP server requires a Flux API endpoint to function. You have two options for setting up the API:

Option 1: Deploy using snakeying/flux-api-worker (Recommended)

snakeying/flux-api-worker provides a simple and efficient Cloudflare Worker for accessing the Flux model:

1. Fork the flux-api-worker repository
2. Deploy it to Cloudflare Workers:
- Create a new Worker in your Cloudflare dashboard
- Connect it to your forked repository
- Set up the required environment variables:
- API_KEY: Your chosen API key for authentication
- CF_ACCOUNT_ID: Your Cloudflare account ID
- CF_API_TOKEN: Your Cloudflare API token with Workers AI access
- FLUX_MODEL: The Flux model to use (default: "@cf/black-forest-labs/flux-1-schnell")
3. Once deployed, your API will be available at https://your-worker-name.your-subdomain.workers.dev
4. Use this URL as your FLUX_API_URL and your chosen API key as FLUX_API_TOKEN

Option 2: Deploy using aigem/cf-flux-remix

For a more feature-rich implementation with a web UI, you can use aigem/cf-flux-remix:

1. Follow the installation instructions in the cf-flux-remix repository
2. Once deployed, your API will be available at your deployed URL
3. Use this URL as your FLUX_API_URL and your configured API key as FLUX_API_TOKEN

📚 Documentation

Available Tools

generate_image

Generates an image based on a text prompt using the Flux model.

{
  prompt: string;                // Required: Text description of the image to generate
  num_inference_steps?: number;  // Optional: Number of denoising steps (1-4) (default: 4)
  aspect_ratio?: string;         // Optional: Aspect ratio (e.g., "16:9", "4:3") (default: "1:1")
}

🔧 Usage

Cursor Integration

Method 1: Using mcp.json

1. Create or edit the .cursor/mcp.json file in your project directory:

{
  "mcpServers": {
    "flux-cloudflare-mcp": {
      "command": "env FLUX_API_TOKEN=YOUR_TOKEN FLUX_API_URL=YOUR_API_URL npx",
      "args": ["-y", "flux-cloudflare-mcp"]
    }
  }
}

2. Replace YOUR_TOKEN with your actual Flux API token and YOUR_API_URL with your API URL
3. Restart Cursor to apply the changes

Method 2: Using Cursor MCP Settings

1. Open Cursor and go to Settings
2. Navigate to the "MCP" or "Model Context Protocol" section
3. Click "Add Server" or equivalent
4. Enter the following command in the appropriate field:

env FLUX_API_TOKEN=YOUR_TOKEN FLUX_API_URL=YOUR_API_URL npx -y flux-cloudflare-mcp

5. Replace YOUR_TOKEN with your actual Flux API token and YOUR_API_URL with your API URL
6. Save the settings and restart Cursor if necessary

Claude Desktop Integration

env FLUX_API_TOKEN=YOUR_TOKEN FLUX_API_URL=YOUR_API_URL npx -y flux-cloudflare-mcp

{
  "mcpServers": {
    "flux-cloudflare-mcp": {
      "command": "npx",
      "args": ["-y", "flux-cloudflare-mcp"],
      "env": {
        "FLUX_API_TOKEN": "YOUR_TOKEN",
        "FLUX_API_URL": "YOUR_API_URL"
      }
    }
  }
}

💻 Local Development

1. Clone the repository:

git clone https://github.com/Hzzy2O/flux-cloudflare-mcp.git
cd flux-cloudflare-mcp

2. Install dependencies:

npm install

3. Build the project:

npm run build

🛠 Technical Stack

Model Context Protocol SDK - Core MCP functionality
Cloudflare Workers - Serverless API for image generation
TypeScript - Type safety and modern JavaScript features
Zod - Runtime type validation

⚙️ Configuration

The server requires the following environment variables:

- FLUX_API_TOKEN: Your API token for authentication with the Flux API
- FLUX_API_URL: The URL of your deployed Flux API (from snakeying/flux-api-worker or aigem/cf-flux-remix)

🔍 Troubleshooting

Common Issues

Authentication Error

- Ensure your FLUX_API_TOKEN is correctly set in the environment - Verify your token is valid by testing it with the Flux API directly

API Connection Issues

- Check that your Flux API (Cloudflare Worker) is running and accessible - Ensure your network allows connections to Cloudflare Workers

Safety Filter Triggered

- The model has a built-in safety filter that may block certain prompts - Try modifying your prompt to avoid potentially problematic content

🤝 Contributing

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

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🔗 Resources

- Model Context Protocol Documentation
- Cloudflare Workers Documentation
- Flux Model Documentation
- MCP TypeScript SDK
- snakeying/flux-api-worker - Simple Flux API implementation
- aigem/cf-flux-remix - Feature-rich Flux API with web UI