EPA vs FEC
Same instrument, two spec sheets — measured, not claimed.
EPA vs FEC: common questions
Which is more reliable, EPA or FEC?
On our scheduled checks, FEC leads on measured uptime — EPA at 54.9% versus FEC at 99.02% 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, EPA or FEC?
FEC has the lower median latency in our checks — EPA responds in 3150 ms versus FEC at 1602 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 EPA and FEC need an API key?
EPA needs no key, while FEC requires a free API key. If you want to start calling without signup, reach for EPA first.
Can I call EPA and FEC from the browser?
Yes — both EPA and FEC 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 EPA and FEC free for commercial use?
EPA has unclear commercial terms, and FEC 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.