MCP Server

qr3.app exposes an MCP server for AI tools like Claude and Cursor. The current server uses a standard HTTP transport and bearer authentication.

Setup

Claude Desktop
Cursor

Edit ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "qr3": {
      "url": "https://mcp.qr3.app/mcp",
      "headers": {
        "Authorization": "Bearer qr3_sk_your_key"
      }
    }
  }
}

Edit .cursor/mcp.json in your project root:

{
  "mcpServers": {
    "qr3": {
      "url": "https://mcp.qr3.app/mcp",
      "headers": {
        "Authorization": "Bearer qr3_sk_your_key"
      }
    }
  }
}

Available tools

Core tools

Tool	Description
`create_qr`	Create a URL, vCard, WiFi, email, SMS, location, event, social, or WhatsApp QR code
`update_qr`	Update an existing QR code’s target URL, status, tags, or expiry
`list_qrs`	List QR codes with filtering and pagination
`get_qr_stats`	Get aggregated scan stats for a QR code
`create_batch`	Create multiple QR codes in one request
`create_vcard_qr`	Create a vCard QR code
`create_wifi_qr`	Create a WiFi QR code
`get_image`	Get a QR image URL or base64 data
`shorten_url`	Shorten a URL and optionally create a QR code

DPP resources

The server also exposes static resources for the DPP contract:

URI	Content
`qr3://qr-types`	Supported QR code and DPP payload types
`qr3://error-codes`	Error types and handling guidance
`qr3://rate-limits`	Plan-based rate limits
`qr3://quickstart`	Quickstart guide
`qr3://dpp-schema`	Battery-first DPP contract
`qr3://gs1-test-vectors`	GS1 resolver examples
`qr3://dpp-content-negotiation-examples`	Resolver response examples

Example prompts

Create a QR code for https://example.com

Show me the scan stats for qr_abc123

Create a battery DPP with GTIN 04012345678901 and the required battery data