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UK Police vs National Vulnerability Database

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

APIUK PoliceNEW—National Vulnerability DatabaseNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useyesyes
Data licenseOpen Government Licence v3.0Public domain (U.S. Government work)
Free tierFree — no key requiredFree — no key required (free key raises limits)
Rate limitUnpublished5 requests per rolling 30 seconds without an API key (50 with a free key)
In directory since2026-07-052026-07-05
operationalpartialdownno data

UK Police vs National Vulnerability Database: common questions

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

On our scheduled checks, National Vulnerability Database leads on measured uptime — UK Police at —% versus National Vulnerability Database at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do UK Police and National Vulnerability Database need an API key?

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

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

Yes — both UK Police and National Vulnerability Database send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

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

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