CDNJS vs QR code

cdnjs mirrors thousands of open-source JavaScript, CSS, and font libraries on Cloudflare's edge network, and its free `/libraries` and `/libraries/:library` endpoints expose the same catalogue as JSON — name, latest version, file list, SRI hashes, and linked GitHub metadata — backed by Algolia search. No key or signup is required for either the asset CDN or the metadata API, and responses cache for six hours server-side.

goQR.me's QR code API, served from api.qrserver.com rather than the marketing domain, offers two commands: create-qr-code renders a PNG, SVG, or EPS QR image from a data string, while read-qr-code decodes an existing QR image (by URL or upload) and returns the result as JSON. Run by Foundata GmbH, it imposes no request limit beyond reserving the right to reject abusive traffic, and it logs only the requesting referrer/IP, never the QR content itself.