qwen-image-replicate-mcp-server by PierrunoYT - MCP Server

Qwen Image Replicate MCP Server

A Model Context Protocol (MCP) server that provides image generation capabilities using Alibaba's Qwen Image model via the Replicate platform.

Features

Qwen Image is an advanced text-to-image foundation model that excels at:

Complex text rendering with accurate text layout in generated images
Precise image editing capabilities
High-quality image generation from detailed text prompts
Multiple image sizes and aspect ratios support
Advanced guidance controls for fine-tuning results

Available Tools

`generate_image`

Generate high-quality images from text prompts using Qwen Image via Replicate.

Parameters:

prompt (required): Text description of the image to generate (supports detailed prompts)
image_size (optional): Image size/aspect ratio - one of: 1024x1024, 720x1280, 1280x720, 768x1024, 1024x768 (default: 1024x768)
num_inference_steps (optional): Number of inference steps, higher = better quality but slower (1-500, default: 50)
seed (optional): Random seed for reproducible results (0-2147483647)
guidance_scale (optional): CFG scale - how closely to follow the prompt (1-20, default: 4)
negative_prompt (optional): Specify what should NOT be in the image (default: "")

Installation

Prerequisites

Replicate API Key: Get your API key from Replicate
- Sign up for an account at https://replicate.com/
- Navigate to your account settings and copy your API token
- Keep this key secure as you'll need it for configuration
Node.js: Ensure you have Node.js installed (version 18 or higher)

Quick Setup (Recommended)

The easiest way to use this server is through npx, which automatically downloads and runs the latest version:

For Claude Desktop App

Add the server to your Claude Desktop configuration file:

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

{
  "mcpServers": {
    "qwen-image": {
      "command": "npx",
      "args": [
        "-y",
        "https://github.com/PierrunoYT/qwen-image-fal-mcp-server.git"
      ],
      "env": {
        "REPLICATE_API_TOKEN": "your_replicate_token_here"
      }
    }
  }
}

For Kilo Code MCP Settings

Add to your MCP settings file at: C:\Users\[username]\AppData\Roaming\Code\User\globalStorage\kilocode.kilo-code\settings\mcp_settings.json

{
  "mcpServers": {
    "qwen-image": {
      "command": "npx",
      "args": [
        "-y",
        "https://github.com/PierrunoYT/qwen-image-fal-mcp-server.git"
      ],
      "env": {
        "REPLICATE_API_TOKEN": "your_replicate_token_here"
      },
      "disabled": false,
      "alwaysAllow": []
    }
  }
}

Benefits of npx Configuration

✅ Universal Access: Works on any machine with Node.js ✅ No Local Installation: npx downloads and runs automatically ✅ Always Latest Version: Pulls from GitHub repository ✅ Cross-Platform: Windows, macOS, Linux compatible ✅ Settings Sync: Works everywhere you use your MCP client

Manual Installation (Alternative)

If you prefer to install locally:

Clone the repository

git clone https://github.com/PierrunoYT/qwen-image-fal-mcp-server.git
cd qwen-image-fal-mcp-server

Install dependencies
```
npm install
```
Build the server
```
npm run build
```

Use absolute path in configuration

{
  "mcpServers": {
    "qwen-image": {
      "command": "node",
      "args": ["/absolute/path/to/qwen-image-fal-mcp-server/build/index.js"],
      "env": {
        "REPLICATE_API_TOKEN": "your_replicate_token_here"
      }
    }
  }
}

Helper script to get the absolute path:

npm run get-path

Usage Examples

Once configured, you can use the server through your MCP client:

Basic Image Generation

Generate an image of a serene mountain landscape at sunset with a lake reflection

Complex Text Rendering

Create a vintage poster with the text "Welcome to AI Art" in ornate lettering, art deco style

Specific Image Size

Generate a portrait-oriented image of a futuristic cityscape (1024x768)

High-Quality Generation

Generate a photorealistic portrait with 50 inference steps and guidance scale 7.5

Advanced Parameters

Create a detailed fantasy landscape with negative prompt "blurry, low quality" and seed 12345 for reproducibility

API Response Format

The server returns detailed information about generated images:

✅ Successfully generated 1 image(s) using Qwen Image:

📝 **Generation Details:**
• Prompt: "a serene mountain landscape at sunset"
• Image Size: 1024x768
• Inference Steps: 50
• Guidance Scale: 4
• Seed Used: 1234567890
• Generation Time: 4500ms

🖼️ **Generated Images (1 total, 1 downloaded):**
• Image 1: ./images/qwen_image_mountain_landscape_0_2024-01-15T10-30-45.webp (https://replicate.delivery/...)

💾 Images have been downloaded to the local 'images' directory.

Development

Local Testing

# Test the server directly
echo '{"jsonrpc": "2.0", "id": 1, "method": "tools/list"}' | node build/index.js

Watch Mode

npm run watch

Run Test Server

npm run test:server

Health Check

npm run health-check

Inspector Tool

npm run inspector

Environment Variables

Required

REPLICATE_API_TOKEN: Your Replicate API key (required for image generation)

Optional

NODE_ENV: Environment mode (development, production, test) - default: production
LOG_LEVEL: Logging level (error, warn, info, debug) - default: info
MAX_CONCURRENT_REQUESTS: Maximum concurrent requests (1-10) - default: 3
REQUEST_TIMEOUT: Request timeout in milliseconds (30000-600000) - default: 300000

Troubleshooting

Common Issues

"REPLICATE_API_TOKEN environment variable is required"
- The server will continue running and show this helpful error message
- Ensure your Replicate API key is properly set in the MCP configuration
- Verify the key is valid and has sufficient credits
- Note: The server no longer crashes when the API key is missing
"Server not showing up in Claude"
- If using npx configuration, ensure you have Node.js installed (v18+)
- For manual installation, check that the absolute path is correct
- Restart Claude Desktop after configuration changes
- Verify the JSON configuration syntax is valid
"Generation failed"
- Check your Replicate account has sufficient credits
- Verify your API key has the necessary permissions
- Try with a simpler prompt to test connectivity
- Check if the image size and parameters are valid
"npx command not found"
- Ensure Node.js is properly installed
- Try running node --version and npm --version to verify installation

Server Stability Improvements

✅ Robust Error Handling: Server continues running even without API key ✅ Graceful Shutdown: Proper handling of SIGINT and SIGTERM signals ✅ User-Friendly Messages: Clear error messages with setup instructions ✅ No More Crashes: Eliminated process.exit() calls that caused connection drops ✅ Local Image Storage: Downloads generated images for offline access

Debug Logging

The server outputs debug information to stderr, which can help diagnose issues:

Generation progress updates
Error messages with helpful instructions
API call details
Graceful shutdown notifications

Performance Tips

Lower num_inference_steps for faster generation (try 20-25)
Cache results using the seed parameter for reproducibility

Pricing

Image generation costs are determined by Replicate's pricing structure. Check Replicate Pricing for current rates.

License

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

Contributing

Fork the repository
Create a feature branch
Make your changes
Add tests if applicable
Submit a pull request

Support

For issues related to:

This MCP server: Open an issue in this repository
Replicate API: Contact Replicate support
Qwen Image model: Refer to Replicate documentation

Changelog

v1.1.0 (Latest)

🚀 Switched to Replicate: Migrated from fal.ai to Replicate for image generation.
🔧 Updated Dependencies: Replaced @fal-ai/client with replicate.
⚙️ Simplified Parameters: Removed fal.ai-specific parameters like sync_mode, acceleration, output_format, etc.
📝 Updated Documentation: All documentation now reflects Replicate usage.

v1.0.0

🎨 Qwen Image Integration: Full implementation of Qwen Image model via fal.ai
🔧 Fixed connection drops: Removed process.exit() calls that caused server crashes
🛡️ Improved error handling: Server continues running even without API key
🌍 Added portability: npx configuration works on any machine
📦 Enhanced stability: Graceful shutdown handlers and null safety checks
💬 Better user experience: Clear error messages with setup instructions
🔄 Auto-updating: npx pulls latest version from GitHub automatically
📁 Local image storage: Downloads generated images to local directory
🎯 Advanced parameters: Support for all Qwen Image parameters including LoRAs
⚡ Performance optimization: Configurable acceleration levels
🛡️ Safety features: Built-in content safety checking

PierrunoYT/qwen-image-replicate-mcp-server