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FastDOL vs FEC

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

APIFastDOLHEALTHY85FECREACHABLE99
Uptime · 30d
Uptime · 90d100%99.02%
Uptime · 30d100%98.3%
P50 · ms6801602
P95 · ms17253334
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, FastDOL leads on measured uptime — FastDOL at 100% 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, FastDOL or FEC?

FastDOL has the lower median latency in our checks — FastDOL responds in 680 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 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.