QR Code Skill

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

Capabilities

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
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)