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National Vulnerability Database vs UK Police

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

APINational Vulnerability DatabaseDYING78UK PoliceHEALTHY91
Uptime · 30d
Uptime · 90d86.3%100%
Uptime · 30d83.3%100%
P50 · ms974787
P95 · ms47772547
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useyesyes
Data licensePublic domain (U.S. Government work)Open Government Licence v3.0
Free tierFree — no key required (free key raises limits)Free — no key required
Rate limit5 requests per rolling 30 seconds without an API key (50 with a free key)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

National Vulnerability Database vs UK Police: common questions

Which is more reliable, National Vulnerability Database or UK Police?

On our scheduled checks, UK Police leads on measured uptime — National Vulnerability Database at 86.3% versus UK Police at 100% 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 UK Police?

UK Police has the lower median latency in our checks — National Vulnerability Database responds in 974 ms versus UK Police at 787 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 UK Police need an API key?

Neither needs a paid key — National Vulnerability Database is callable with no signup, and UK Police is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call National Vulnerability Database and UK Police from the browser?

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

Are National Vulnerability Database and UK Police free for commercial use?

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