Gemini Image MCP Server

A Model Context Protocol (MCP) server that provides image generation and manipulation capabilities using Google's Gemini API. This server integrates with Claude Desktop and other MCP-compatible clients to enable AI-powered image operations.

Features

• Image Generation: Create images from text prompts using Gemini 2.5 Flash Image Preview
• Image Modification: Modify existing images with natural language instructions
• Image Analysis: Analyze images for objects, text, colors, emotions, and comprehensive insights
• Batch Generation: Generate multiple images from different prompts in one operation
• Style Transfer: Apply artistic styles to existing images
• Rate Limiting: Built-in rate limiting to respect API quotas
• Safety Settings: Configurable content safety levels

Available Tools

1. generateImage

Generate images from text prompts with customizable options.

Parameters:

• prompt (required): Text description of the image to generate
• width (optional): Image width in pixels
• height (optional): Image height in pixels
• aspectRatio (optional): One of 1:1, 16:9, 9:16, 4:3, 3:4
• style (optional): One of realistic, artistic, cartoon, sketch, watercolor, oil-painting
• quality (optional): One of standard, high, ultra
• numberOfImages (optional): Number of images to generate (default: 1)

2. modifyImage

Modify existing images using natural language instructions.

Parameters:

• imageBase64 (required): Base64 encoded image data
• instructions (required): Text instructions for modification
• preserveStyle (optional): Whether to preserve original artistic style
• strength (optional): Modification strength from 0 to 1

3. analyzeImage

Analyze images and extract various types of information.

Parameters:

• imageBase64 (required): Base64 encoded image data
• analysisType (optional): One of description, objects, text, colors, emotions, comprehensive
• detail (optional): Analysis detail level - low, medium, high

4. batchGenerate

Generate multiple images from different prompts efficiently.

Parameters:

• prompts (required): Array of text prompts
• baseOptions (optional): Shared options to apply to all generations

5. applyStyleTransfer

Apply artistic styles to existing images.

Parameters:

• imageBase64 (required): Base64 encoded image data
• style (required): One of anime, renaissance, impressionist, cyberpunk, minimalist, vintage, futuristic
• intensity (optional): Style intensity from 0 to 100

Installation

Prerequisites

• Node.js 18 or higher
• Google Gemini API key (Get one here)

Setup

1. Clone or download the project:

git clone <repository-url>
cd gemini-image-mcp

2. Install dependencies:

npm install

3. Create environment configuration:

cp .env.example .env

4. Edit .env and add your Gemini API key:

GEMINI_API_KEY=your-gemini-api-key-here

5. Build the project:

npm run build

Usage

With Claude Desktop

Add the server to your Claude Desktop configuration file:

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

{
  "mcpServers": {
    "gemini-image": {
      "command": "node",
      "args": ["/path/to/gemini-image-mcp/dist/index.js"],
      "env": {
        "GEMINI_API_KEY": "your-gemini-api-key-here"
      }
    }
  }
}

Standalone Usage

You can also run the server directly for testing:

npm start

Configuration Options

Environment variables you can set:

• GEMINI_API_KEY (required): Your Google Gemini API key
• GEMINI_MODEL (optional): Model to use (default: gemini-2.5-flash-image-preview)
• SAFETY_LEVEL (optional): Content safety level - LOW, MEDIUM, HIGH, BLOCK_NONE (default: MEDIUM)
• MAX_REQUESTS_PER_MINUTE (optional): Rate limit (default: 10)

Examples

Once integrated with Claude Desktop, you can use natural language to interact with the tools:

Image Generation

"Generate an image of a sunset over mountains in watercolor style"

Image Modification

"Take this image and add a rainbow in the sky while preserving the original style"

Image Analysis

"Analyze this image and tell me what objects you can detect with confidence scores"

Batch Generation

"Generate 3 different versions of a futuristic cityscape: one cyberpunk style, one minimalist, and one realistic"

Style Transfer

"Apply an impressionist style to this photograph with high intensity"

Development

Running in Development Mode

npm run dev

Building

npm run build

Type Checking

npm run typecheck

Linting

npm run lint

API Limitations

• Rate limiting is enforced based on your configuration
• Image generation may take 10-30 seconds depending on complexity
• Maximum image size depends on Gemini API limits
• Content safety filters are applied based on your safety level setting

Troubleshooting

Common Issues

1. "GEMINI_API_KEY environment variable is required"

   • Ensure you've set the API key in your environment or Claude Desktop config

2. "Rate limit exceeded"

   • Wait for the rate limit window to reset or adjust MAX_REQUESTS_PER_MINUTE

3. "Image generation failed"

   • Check your prompt for potentially unsafe content
   • Verify your API key has proper permissions
   • Try adjusting the safety level settings

Debug Logging

The server logs errors to stderr. Check the Claude Desktop console or your terminal for detailed error messages.

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Run tests and linting
5. Submit a pull request

License

MIT License - see LICENSE file for details

Support

For issues and questions:

• Check the troubleshooting section above
• Review Claude Desktop MCP documentation
• Create an issue in the repository