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ProblemsByVin vs Transport for Spain

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

APIProblemsByVinNEW—Transport for SpainNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseCC BY 4.0Unverified
Free tierFree (weekly-refreshed static JSON datasets)Free — no key required
Rate limitUnpublished (static JSON files)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ProblemsByVin vs Transport for Spain: common questions

Which is more reliable, ProblemsByVin or Transport for Spain?

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

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

Can I call ProblemsByVin and Transport for Spain from the browser?

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

Are ProblemsByVin and Transport for Spain free for commercial use?

ProblemsByVin allows commercial use on its free tier, and Transport for Spain 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.