CPFHub vs EPA
Same instrument, two spec sheets — measured, not claimed.
CPFHub vs EPA: common questions
Which is more reliable, CPFHub or EPA?
On our scheduled checks, EPA leads on measured uptime — CPFHub at —% versus EPA 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 CPFHub and EPA need an API key?
EPA needs no key, while CPFHub requires a free API key. If you want to start calling without signup, reach for EPA first.
Can I call CPFHub and EPA from the browser?
Yes — both CPFHub and EPA send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are CPFHub and EPA free for commercial use?
CPFHub has unclear commercial terms, and EPA 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.