OpenHolidays API vs Telegraph
Same instrument, two spec sheets — measured, not claimed.
OpenHolidays API vs Telegraph: common questions
Which is more reliable, OpenHolidays API or Telegraph?
Both are neck-and-neck — OpenHolidays API and Telegraph 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, OpenHolidays API or Telegraph?
OpenHolidays API has the lower median latency in our checks — OpenHolidays API responds in 127 ms versus Telegraph at 444 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 Telegraph need an API key?
OpenHolidays API needs no key, while Telegraph requires a free API key. If you want to start calling without signup, reach for OpenHolidays API first.
Can I call OpenHolidays API and Telegraph from the browser?
Yes — both OpenHolidays API and Telegraph 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 Telegraph free for commercial use?
OpenHolidays API has unclear commercial terms, and Telegraph 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.