Image Generation (Flux) MCP server

This MCP server provides image generation capabilities through the Replicate Flux model. It allows Claude to create images from text descriptions using a simple API interface.

Installation

Via Smithery

The easiest installation method is through Smithery:

npx -y @smithery/cli install @GongRzhe/Image-Generation-MCP-Server --client claude

NPX Method (No Local Setup)

You can use the package directly from npm without installing it locally.

Local Installation

If you prefer a local installation:

# Global installation
npm install -g @gongrzhe/image-gen-server

# Or local installation
npm install @gongrzhe/image-gen-server

Configuration

Configure Claude Desktop

Edit your Claude Desktop configuration file:

• On MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• On Windows: %APPDATA%/Claude/claude_desktop_config.json

NPX Configuration (Recommended)

This method runs the server directly from npm without needing local files:

{
  "mcpServers": {
    "image-gen": {
      "command": "npx",
      "args": ["@gongrzhe/image-gen-server"],
      "env": {
        "REPLICATE_API_TOKEN": "your-replicate-api-token",
        "MODEL": "alternative-model-name"
      },
      "disabled": false,
      "autoApprove": []
    }
  }
}

Local Installation Configuration

If you installed the package locally:

{
  "mcpServers": {
    "image-gen": {
      "command": "node",
      "args": ["/path/to/image-gen-server/build/index.js"],
      "env": {
        "REPLICATE_API_TOKEN": "your-replicate-api-token",
        "MODEL": "alternative-model-name"
      },
      "disabled": false,
      "autoApprove": []
    }
  }
}

Setting Up Your Replicate API Token

1. Sign up/login at https://replicate.com
2. Go to https://replicate.com/account/api-tokens
3. Create a new API token
4. Copy the token and replace your-replicate-api-token in the MCP settings

Environment Variables

• REPLICATE_API_TOKEN (required): Your Replicate API token for authentication
• MODEL (optional): The Replicate model to use for image generation. Defaults to "black-forest-labs/flux-schnell"

Configuration Parameters

• disabled: Controls whether the server is enabled (false) or disabled (true)
• autoApprove: Array of tool names that can be executed without user confirmation. Empty array means all tool calls require confirmation.

Using the Image Generation Tool

generate_image

This tool generates images using the Flux model based on text prompts.

Parameters

• prompt (required): Text description of the image to generate
• seed (optional): Random seed for reproducible generation
• aspect_ratio (optional): Image aspect ratio (default: "1:1")
• output_format (optional): Output format - "webp", "jpg", or "png" (default: "webp")
• num_outputs (optional): Number of images to generate (1-4, default: 1)

Example Usage

const result = await use_mcp_tool({
  server_name: "image-gen",
  tool_name: "generate_image",
  arguments: {
    prompt: "A beautiful sunset over mountains",
    aspect_ratio: "16:9",
    output_format: "png",
    num_outputs: 1
  }
});

The tool returns an array of URLs to the generated images.

How to add this MCP server to Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > MCP and click "Add new global MCP server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "cursor-rules-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "cursor-rules-mcp"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explictly ask the agent to use the tool by mentioning the tool name and describing what the function does.