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CarsXE vs Transport for London, England

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

APICarsXENEW—Transport for London, EnglandNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key may be required for production
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

CarsXE vs Transport for London, England: common questions

Which is more reliable, CarsXE or Transport for London, England?

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

Both ask you to authenticate — CarsXE uses an API key and Transport for London, England uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call CarsXE and Transport for London, England from the browser?

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

Are CarsXE and Transport for London, England free for commercial use?

CarsXE has unclear commercial terms, and Transport for London, England 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.