shipapis
StarSubmit an APISubmit API

Hebrew Calendar vs PostStack

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

APIHebrew CalendarHEALTHY93PostStackHEALTHY87
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms5331066
P95 · ms20161890
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Hebrew Calendar vs PostStack: common questions

Which is more reliable, Hebrew Calendar or PostStack?

Both are neck-and-neck — Hebrew Calendar and PostStack each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Hebrew Calendar or PostStack?

Hebrew Calendar has the lower median latency in our checks — Hebrew Calendar responds in 533 ms versus PostStack at 1066 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 Hebrew Calendar and PostStack need an API key?

Hebrew Calendar needs no key, while PostStack requires a free API key. If you want to start calling without signup, reach for Hebrew Calendar first.

Can I call Hebrew Calendar and PostStack from the browser?

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

Are Hebrew Calendar and PostStack free for commercial use?

Hebrew Calendar has unclear commercial terms, and PostStack 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.