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Hebrew Calendar vs Lobsters

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

APIHebrew CalendarNEW—LobstersNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Hebrew Calendar vs Lobsters: common questions

Which is more reliable, Hebrew Calendar or Lobsters?

On our scheduled checks, Lobsters leads on measured uptime — Hebrew Calendar at —% versus Lobsters 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 Hebrew Calendar and Lobsters need an API key?

Neither needs a paid key — Hebrew Calendar is callable with no signup, and Lobsters is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Hebrew Calendar and Lobsters from the browser?

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

Are Hebrew Calendar and Lobsters free for commercial use?

Hebrew Calendar has unclear commercial terms, and Lobsters 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.