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Complete Criminal Checks vs National Vulnerability Database

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

APIComplete Criminal ChecksDEAD0National Vulnerability DatabaseDYING78
Uptime · 30d
Uptime · 90d0.0%86.3%
Uptime · 30d0.0%83.3%
P50 · ms—974
P95 · ms—4777
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedPublic domain (U.S. Government work)
Free tierFree tier — API 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

Complete Criminal Checks vs National Vulnerability Database: common questions

Which is more reliable, Complete Criminal Checks or National Vulnerability Database?

On our scheduled checks, National Vulnerability Database leads on measured uptime — Complete Criminal Checks at 0.0% versus National Vulnerability Database at 86.3% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Complete Criminal Checks and National Vulnerability Database need an API key?

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

Can I call Complete Criminal Checks and National Vulnerability Database from the browser?

Only Complete Criminal Checks 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 Complete Criminal Checks and National Vulnerability Database free for commercial use?

Complete Criminal Checks has unclear commercial terms, 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.