{"message":"x402 QR Code Generator API","endpoints":{"/":"API information","/health":"Health check","/protected-route":"Protected content example (GET, $0.001)","/generate-qr":"Generate QR code image (POST, $0.001)","/generate-qr/dataurl":"Generate QR code as data URL (POST, $0.001)"},"documentation":"Send POST requests to /generate-qr with JSON body containing 'data' field and optional styling parameters"}