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apilayer aviationstack vs NHTSA

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

APIapilayer aviationstackHEALTHY96NHTSAHEALTHY90
Uptime · 30d
Uptime · 90d98.9%98.9%
Uptime · 30d100%98.3%
P50 · ms287514
P95 · ms11474902
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedPublic domain (U.S. Government work)
Free tierFree tier — API key requiredFree, no key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

apilayer aviationstack vs NHTSA: common questions

Which is more reliable, apilayer aviationstack or NHTSA?

Both are neck-and-neck — apilayer aviationstack and NHTSA each measure 98.9% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, apilayer aviationstack or NHTSA?

apilayer aviationstack has the lower median latency in our checks — apilayer aviationstack responds in 287 ms versus NHTSA at 514 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 apilayer aviationstack and NHTSA need an API key?

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

Can I call apilayer aviationstack and NHTSA from the browser?

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

Are apilayer aviationstack and NHTSA free for commercial use?

apilayer aviationstack 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.