City, Lviv vs Federal Register

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

Uptime · 30d
Uptime · 90d74.5%98.0%
Uptime · 30d70.0%98.3%
P50 · ms965478
P95 · ms23013165
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedUS Government work — public domain
Free tierFree — limits not publishedFree — no key or signup required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

City, Lviv vs Federal Register: common questions

Which is more reliable, City, Lviv or Federal Register?

On our scheduled checks, Federal Register leads on measured uptime — City, Lviv at 74.5% versus Federal Register at 98.0% 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, City, Lviv or Federal Register?

Federal Register has the lower median latency in our checks — City, Lviv responds in 965 ms versus Federal Register at 478 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 City, Lviv and Federal Register need an API key?

Neither needs a paid key — City, Lviv is callable with no signup, and Federal Register is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call City, Lviv and Federal Register from the browser?

Only Federal Register is browser-friendly — it returns CORS headers over HTTPS. City, Lviv needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are City, Lviv and Federal Register free for commercial use?

City, Lviv has unclear commercial terms, and Federal Register allows commercial use on its free tier. 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.