Open Notify vs USPTO
Same instrument, two spec sheets — measured, not claimed.
Open Notify vs USPTO: common questions
Which is more reliable, Open Notify or USPTO?
On our scheduled checks, USPTO leads on measured uptime — Open Notify at 71.6% versus USPTO at 100% 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, Open Notify or USPTO?
Open Notify has the lower median latency in our checks — Open Notify responds in 241 ms versus USPTO at 1141 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 Open Notify and USPTO need an API key?
Neither needs a paid key — Open Notify is callable with no signup, and USPTO is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Open Notify and USPTO from the browser?
Neither sends browser-friendly CORS headers reliably, so call Open Notify and USPTO from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are Open Notify and USPTO free for commercial use?
Open Notify has unclear commercial terms, and USPTO 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.