npm Registry vs serpstack
Same instrument, two spec sheets — measured, not claimed.
npm Registry vs serpstack: common questions
Which is more reliable, npm Registry or serpstack?
On our scheduled checks, npm Registry leads on measured uptime — npm Registry at 100% versus serpstack at 99.02% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, npm Registry or serpstack?
npm Registry has the lower median latency in our checks — npm Registry responds in 243 ms versus serpstack at 492 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.
Do npm Registry and serpstack need an API key?
npm Registry needs no key, while serpstack requires a free API key. If you want to start calling without signup, reach for npm Registry first.
Can I call npm Registry and serpstack from the browser?
Only npm Registry is browser-friendly — it returns CORS headers over HTTPS. serpstack needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are npm Registry and serpstack free for commercial use?
npm Registry has unclear commercial terms, and serpstack 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.