OpenSky Network vs Transport for Philadelphia, US
Same instrument, two spec sheets — measured, not claimed.
OpenSky Network vs Transport for Philadelphia, US: common questions
Which is more reliable, OpenSky Network or Transport for Philadelphia, US?
On our scheduled checks, Transport for Philadelphia, US leads on measured uptime — OpenSky Network at —% versus Transport for Philadelphia, US 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 OpenSky Network and Transport for Philadelphia, US need an API key?
Neither needs a paid key — OpenSky Network is callable with no signup, and Transport for Philadelphia, US is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call OpenSky Network and Transport for Philadelphia, US from the browser?
Neither sends browser-friendly CORS headers reliably, so call OpenSky Network and Transport for Philadelphia, US from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are OpenSky Network and Transport for Philadelphia, US free for commercial use?
OpenSky Network is personal/non-commercial only, 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.