npm Registry vs SEO Score
Same instrument, two spec sheets — measured, not claimed.
npm Registry vs SEO Score: common questions
Which is more reliable, npm Registry or SEO Score?
Both are neck-and-neck — npm Registry and SEO Score each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.
Which is faster, npm Registry or SEO Score?
npm Registry has the lower median latency in our checks — npm Registry responds in 243 ms versus SEO Score at 634 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 SEO Score need an API key?
npm Registry needs no key, while SEO Score requires a free API key. If you want to start calling without signup, reach for npm Registry first.
Can I call npm Registry and SEO Score from the browser?
Only npm Registry is browser-friendly — it returns CORS headers over HTTPS. SEO Score needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are npm Registry and SEO Score free for commercial use?
npm Registry has unclear commercial terms, and SEO Score 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.