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CarAPI vs ProblemsByVin

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

APICarAPINEW—ProblemsByVinNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedCC BY 4.0
Free tierFree tier — API key may be required for productionFree (weekly-refreshed static JSON datasets)
Rate limitUnpublishedUnpublished (static JSON files)
In directory since2026-07-052026-07-05
operationalpartialdownno data

CarAPI vs ProblemsByVin: common questions

Which is more reliable, CarAPI or ProblemsByVin?

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

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

Can I call CarAPI and ProblemsByVin from the browser?

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

Are CarAPI and ProblemsByVin free for commercial use?

CarAPI has unclear commercial terms, 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.