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Transport for London, England vs Transport for Philadelphia, US

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

APITransport for London, EnglandHEALTHY77Transport for Philadelphia, USHEALTHY86
Uptime · 30d
Uptime · 90d68.6%100%
Uptime · 30d46.7%100%
P50 · ms316714
P95 · ms7324585
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key may be required for productionFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Transport for London, England vs Transport for Philadelphia, US: common questions

Which is more reliable, Transport for London, England or Transport for Philadelphia, US?

On our scheduled checks, Transport for Philadelphia, US leads on measured uptime — Transport for London, England at 68.6% versus Transport for Philadelphia, US 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, Transport for London, England or Transport for Philadelphia, US?

Transport for London, England has the lower median latency in our checks — Transport for London, England responds in 316 ms versus Transport for Philadelphia, US at 714 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 Transport for London, England and Transport for Philadelphia, US need an API key?

Transport for Philadelphia, US needs no key, while Transport for London, England requires a free API key. If you want to start calling without signup, reach for Transport for Philadelphia, US first.

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

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

Are Transport for London, England and Transport for Philadelphia, US free for commercial use?

Transport for London, England has unclear commercial terms, and Transport for Philadelphia, US 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.