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FastDOL vs FEC

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

APIFastDOLNEW—FECREACHABLE—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

FastDOL vs FEC: common questions

Which is more reliable, FastDOL or FEC?

On our scheduled checks, FEC leads on measured uptime — FastDOL at —% versus FEC 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 FastDOL and FEC need an API key?

Both ask you to authenticate — FastDOL uses an API key and FEC uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call FastDOL and FEC from the browser?

Only FEC 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 FastDOL and FEC free for commercial use?

FastDOL 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.