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OpenHolidays API vs TwitterApi.IO

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

APIOpenHolidays APIHEALTHY94TwitterApi.IOREACHABLE98
Uptime · 30d
Uptime · 90d100%98.0%
Uptime · 30d100%96.7%
P50 · ms533242
P95 · ms39202593
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

OpenHolidays API vs TwitterApi.IO: common questions

Which is more reliable, OpenHolidays API or TwitterApi.IO?

On our scheduled checks, OpenHolidays API leads on measured uptime — OpenHolidays API at 100% versus TwitterApi.IO 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, OpenHolidays API or TwitterApi.IO?

TwitterApi.IO has the lower median latency in our checks — OpenHolidays API responds in 533 ms versus TwitterApi.IO at 242 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 OpenHolidays API and TwitterApi.IO need an API key?

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

Can I call OpenHolidays API and TwitterApi.IO from the browser?

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

Are OpenHolidays API and TwitterApi.IO free for commercial use?

OpenHolidays API has unclear commercial terms, and TwitterApi.IO 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.