QR Code Generation MCP Server

A QR code generation MCP server implemented using FastMCP, supporting text-to-QR code conversion with base64 encoding output.

Features

Support for any text to QR code conversion (including Chinese characters)
Customizable colors and styles
Base64 encoding
Support for STDIO, HTTP, and SSE transport modes

Installation

uv sync
# or
pip install qrcode Pillow mcp

Usage

0. Docker Usage

Build Image

docker build -t qrcode-mcp .

Run Container

# Default SSE mode
docker run -p 8008:8008 qrcode-mcp

# HTTP mode
docker run -p 8008:8008 -e TRANSPORT_MODE=http qrcode-mcp

# STDIO mode (for testing)
docker run -e TRANSPORT_MODE=stdio qrcode-mcp

# Custom host and port
docker run -p 9000:9000 -e TRANSPORT_MODE=http -e HOST=0.0.0.0 -e PORT=9000 qrcode-mcp

Environment Variables

TRANSPORT_MODE: Transport mode (sse, http, stdio), default: sse
HOST: Host address to bind, default: 0.0.0.0
PORT: Port to bind, default: 8008

Docker Compose

version: '3.8'
services:
  qrcode-mcp:
    build: .
    ports:
      - "8008:8008"
    environment:
      - TRANSPORT_MODE=sse
      - HOST=0.0.0.0
      - PORT=8008

1. MCP Server Mode

Start Server

# STDIO mode (for Claude Desktop)
python qrcode_mcp_server.py

# HTTP mode
python qrcode_mcp_server.py --http --host 127.0.0.1 --port 8008

# SSE mode (Server-Sent Events) Deprecated
python qrcode_mcp_server.py --sse --host 127.0.0.1 --port 8008

Configure Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

STDIO Mode (Local Use):

{
  "mcpServers": {
    "qrcode-mcp": {
      "command": "python",
      "args": ["/ABSOLUTE/PATH/TO/qrcode_mcp/qrcode_mcp_server.py"],
      "cwd": "/ABSOLUTE/PATH/TO/qrcode_mcp"
    }
  }
}

HTTP Mode (Network Deployment):

{
  "mcpServers": {
    "qrcode-mcp": {
      "transport": "http",
      "url": "http://127.0.0.1:8008/mcp/"
    }
  }
}

SSE Mode (Server-Sent Events):

{
  "mcpServers": {
    "qrcode-mcp": {
      "serverUrl": "http://127.0.0.1:8008/sse"
    }
  }
}

2. Direct Python API Usage

from qrcode_utils import text_to_qr_base64

# Basic usage
base64_result = text_to_qr_base64("Hello, World!")

# Custom styling
base64_result = text_to_qr_base64(
    "Custom QR Code",
    box_size=15,
    fill_color="darkblue",
    back_color="lightgray"
)

MCP Tools

`generate_qr_code`

Generate QR code and return base64 encoding.

Parameters:

text (required): Text content to convert
box_size (optional): Pixel size of each box, default 10
border (optional): Number of border boxes, default 4
fill_color (optional): Foreground color, default "black"
back_color (optional): Background color, default "white"
return_data_url (optional): Whether to return Data URL format, default false

Testing

python test_mcp_client.py

License

MIT License