ITIS vs Open Notify
Same instrument, two spec sheets — measured, not claimed.
ITIS vs Open Notify: common questions
Which is more reliable, ITIS or Open Notify?
On our scheduled checks, ITIS leads on measured uptime — ITIS at 97.1% versus Open Notify at 71.6% 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, ITIS or Open Notify?
Open Notify has the lower median latency in our checks — ITIS responds in 1767 ms versus Open Notify at 241 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 ITIS and Open Notify need an API key?
Neither needs a paid key — ITIS is callable with no signup, and Open Notify is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call ITIS and Open Notify from the browser?
Neither sends browser-friendly CORS headers reliably, so call ITIS and Open Notify from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are ITIS and Open Notify free for commercial use?
ITIS has unclear commercial terms, and Open Notify 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.