jsDelivr vs npm Registry
Same instrument, two spec sheets — measured, not claimed.
jsDelivr vs npm Registry: common questions
Which is more reliable, jsDelivr or npm Registry?
On our scheduled checks, npm Registry leads on measured uptime — jsDelivr at —% versus npm Registry at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Do jsDelivr and npm Registry need an API key?
Neither needs a paid key — jsDelivr is callable with no signup, and npm Registry is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call jsDelivr and npm Registry from the browser?
Yes — both jsDelivr and npm Registry send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are jsDelivr and npm Registry free for commercial use?
jsDelivr has unclear commercial terms, and npm Registry has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.