NHTSA vs ProblemsByVin
Same instrument, two spec sheets — measured, not claimed.
NHTSA vs ProblemsByVin: common questions
Which is more reliable, NHTSA or ProblemsByVin?
On our scheduled checks, ProblemsByVin leads on measured uptime — NHTSA at 99.02% versus ProblemsByVin at 100% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, NHTSA or ProblemsByVin?
ProblemsByVin has the lower median latency in our checks — NHTSA responds in 760 ms versus ProblemsByVin at 738 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 NHTSA and ProblemsByVin need an API key?
Neither needs a paid key — NHTSA is callable with no signup, and ProblemsByVin is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call NHTSA and ProblemsByVin from the browser?
Yes — both NHTSA and ProblemsByVin 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 ProblemsByVin free for commercial use?
NHTSA allows commercial use on its free tier, and ProblemsByVin 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.