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National Vulnerability Database vs SniffCat

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

APINational Vulnerability DatabaseDYING78SniffCatREACHABLE83
Uptime · 30d
Uptime · 90d86.3%83.3%
Uptime · 30d83.3%83.3%
P50 · ms974290
P95 · ms4777598
AuthnoneapiKey
CORSnono
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, National Vulnerability Database leads on measured uptime — National Vulnerability Database at 86.3% versus SniffCat at 83.3% 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?

SniffCat has the lower median latency in our checks — National Vulnerability Database responds in 974 ms versus SniffCat at 290 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?

Neither sends browser-friendly CORS headers reliably, so call National Vulnerability Database and SniffCat from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

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.