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Footer Year Update vs OpenHolidays API

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

APIFooter Year UpdateHEALTHY100OpenHolidays APIHEALTHY94
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms131533
P95 · ms3293920
Authnonenone
CORSnoyes
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

Footer Year Update vs OpenHolidays API: common questions

Which is more reliable, Footer Year Update or OpenHolidays API?

Both are neck-and-neck — Footer Year Update and OpenHolidays API 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, Footer Year Update or OpenHolidays API?

Footer Year Update has the lower median latency in our checks — Footer Year Update responds in 131 ms versus OpenHolidays API at 533 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 Footer Year Update and OpenHolidays API need an API key?

Neither needs a paid key — Footer Year Update is callable with no signup, and OpenHolidays API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Footer Year Update and OpenHolidays API from the browser?

Only OpenHolidays API is browser-friendly — it returns CORS headers over HTTPS. Footer Year Update needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Footer Year Update and OpenHolidays API free for commercial use?

Footer Year Update has unclear commercial terms, and OpenHolidays API 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.