QR codes for developers and AI agents

Generate QR codes from any language, decode them, verify them, and wire them into agents.

• A free QR code API with no keyUseQR's REST API needs no signup, no API key and no SDK. GET /api/v1/qr?data=hello returns a PNG. The shortest form is /q/hello.png, which drops straight…
• Generate a QR code in JavaScript and ReactFor a QR code in a browser or React app, either point an <img> at the keyless API — one line, no dependency — or use a client-side library such as qrcode…
• Generate a QR code in PythonTwo options: call the keyless HTTP API with requests, which needs no dependencies beyond requests and no key, or use the qrcode library locally when you…
• Generate a QR code with curlcurl -o qr.png \"https://useqr.app/q/hello.png\" is the whole thing. No key, no auth header, no SDK. Add query parameters for size, format and…
• QR codes from an AI agent: the UseQR MCP serverUseQR runs a keyless MCP server over Streamable HTTP at /api/mcp. One command adds it to Claude; a few lines of JSON add it to Cursor or Copilot. Agents…
• Why you should verify that a QR code decodesRendering a QR code proves nothing about whether it scans. Styling, colour, logos and print all consume error-correction budget invisibly. The only…