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OpenHolidays API vs Telnyx API

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

APIOpenHolidays APINEW—Telnyx APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublished50, 50;w=1 req/window · 49 remaining · resets 1
In directory since2026-07-052026-07-05
operationalpartialdownno data

OpenHolidays API vs Telnyx API: common questions

Which is more reliable, OpenHolidays API or Telnyx API?

On our scheduled checks, Telnyx API leads on measured uptime — OpenHolidays API at —% versus Telnyx API 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 OpenHolidays API and Telnyx API need an API key?

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

Can I call OpenHolidays API and Telnyx API from the browser?

Yes — both OpenHolidays API and Telnyx API send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are OpenHolidays API and Telnyx API free for commercial use?

OpenHolidays API has unclear commercial terms, and Telnyx 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.