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National Vulnerability Database vs SniffCat

Same instrument, two spec sheets — measured, not claimed.

APINational Vulnerability DatabaseHEALTHY87SniffCatREACHABLE94
Uptime · 30d
Uptime · 90d91.6%94.4%
Uptime · 30d93.1%93.3%
P50 · ms263345
P95 · ms44481504
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useyesyes
Data licensePublic domain (U.S. Government work)
Free tierFree — no key required (free key raises limits)
Rate limit5 requests per rolling 30 seconds without an API key (50 with a free key)Retry-After: 24s
In directory since2026-07-052026-08-19
operationalpartialdownno data

National Vulnerability Database vs SniffCat: common questions

Which is more reliable, National Vulnerability Database or SniffCat?

On our scheduled checks, SniffCat leads on measured uptime — National Vulnerability Database at 91.6% versus SniffCat at 94.4% 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, National Vulnerability Database or SniffCat?

National Vulnerability Database has the lower median latency in our checks — National Vulnerability Database responds in 263 ms versus SniffCat at 345 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 National Vulnerability Database and SniffCat need an API key?

National Vulnerability Database needs no key, while SniffCat requires a free API key. If you want to start calling without signup, reach for National Vulnerability Database first.

Can I call National Vulnerability Database and SniffCat from the browser?

Only National Vulnerability Database is browser-friendly — it returns CORS headers over HTTPS. SniffCat needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are National Vulnerability Database and SniffCat free for commercial use?

National Vulnerability Database allows commercial use on its free tier, and SniffCat allows commercial use on its free tier. 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.