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CarAPI vs ProblemsByVin

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

APICarAPIHEALTHY70ProblemsByVinHEALTHY88
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms1223738
P95 · ms22872512
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?

Both are neck-and-neck — CarAPI and ProblemsByVin each measure 100% 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, CarAPI or ProblemsByVin?

ProblemsByVin has the lower median latency in our checks — CarAPI responds in 1223 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 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.