shipapis
StarSubmit an APISubmit API

NHTSA vs Apimetro

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

APINHTSANEW—ApimetroNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licensePublic domain (U.S. Government work)Unverified
Free tierFree, no keyFree — no key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

NHTSA vs Apimetro: common questions

Which is more reliable, NHTSA or Apimetro?

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

Neither needs a paid key — NHTSA is callable with no signup, and Apimetro is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call NHTSA and Apimetro from the browser?

Yes — both NHTSA and Apimetro 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 NHTSA and Apimetro free for commercial use?

NHTSA allows commercial use on its free tier, and Apimetro has unclear commercial terms. 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.