Qrcode Skill

QR code generation and decoding skill. Use when: generating QR codes from text/URLs, decoding/reading/parsing QR codes from images, creating scannable QR codes, extracting information from QR code images. Calls remote MCP service for QR code operations.

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:

json

{
  "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)