EPA vs FastDOL
Same instrument, two spec sheets — measured, not claimed.
EPA vs FastDOL: common questions
Which is more reliable, EPA or FastDOL?
On our scheduled checks, FastDOL leads on measured uptime — EPA at 54.9% versus FastDOL 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, EPA or FastDOL?
FastDOL has the lower median latency in our checks — EPA responds in 3150 ms versus FastDOL at 680 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 FastDOL need an API key?
EPA needs no key, while FastDOL requires a free API key. If you want to start calling without signup, reach for EPA first.
Can I call EPA and FastDOL from the browser?
Only EPA is browser-friendly — it returns CORS headers over HTTPS. FastDOL needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are EPA and FastDOL free for commercial use?
EPA has unclear commercial terms, and FastDOL 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.