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CarVector vs NHTSA

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

APICarVectorNEW—NHTSANEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedPublic domain (U.S. Government work)
Free tierFree tier — key may be requiredFree, no key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

CarVector vs NHTSA: common questions

Which is more reliable, CarVector or NHTSA?

On our scheduled checks, NHTSA leads on measured uptime — CarVector at —% versus NHTSA 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 CarVector and NHTSA need an API key?

NHTSA needs no key, while CarVector requires a free API key. If you want to start calling without signup, reach for NHTSA first.

Can I call CarVector and NHTSA from the browser?

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

Are CarVector and NHTSA free for commercial use?

CarVector has unclear commercial terms, and NHTSA 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.