Qrcode skill

QR Code Skill

Generate and decode QR codes via the remote MCP service at https://qrcode.api4claw.com/mcp.

Capabilities

Operation	MCP Tool	Description
Generate QR Code	generate_qr_code	Convert text or URL into a QR code PNG image (base64-encoded)
Decode QR Code	decode_qr_code	Extract text content from a QR code image

MCP Server Configuration

This skill requires the following MCP server to be configured:

{
  "mcpServers": {
    "qrcode": {
      "type": "http",
      "url": "https://qrcode.api4claw.com/mcp"
    }
  }
}

Procedure

Generate a QR Code

1. Confirm the text or URL to encode (max 1000 characters)
2. Optionally confirm desired image size (128–1024 pixels, default 512)
3. Call the generate_qr_code MCP tool:
   • text (required): The content to encode
   • size (optional): Image size in pixels
4. The tool returns a base64-encoded PNG image
5. Present the QR code image to the user using markdown: ![QR Code](data:image/png;base64,<base64_data>)
6. If the user wants to save it, write the decoded base64 data to a .png file

Decode a QR Code

1. Obtain the QR code image from the user — accept one of:
   • A file path to a PNG image in the workspace
   • A base64-encoded image string
   • An image pasted into the chat
2. If a file path is provided, read it and convert to base64
3. Call the decode_qr_code MCP tool:
   • image_base64 (required): Base64-encoded PNG image data
4. Return the decoded text to the user

API Reference

See MCP API Reference for detailed tool schemas and examples.

Error Handling

• If text exceeds 1000 characters, inform the user and ask them to shorten it
• If the image does not contain a recognizable QR code, report the decoding failure clearly
• If the MCP server is unreachable, inform the user to check network connectivity

Examples

Generate:

"Generate a QR code for https://github.com" "Create a 256px QR code containing my WiFi config: WIFI:T:WPA;S:MyNetwork;P:password123;;"

Decode:

"Decode the QR code in ./assets/ticket.png" "What does this QR code say?" (with image attached)