Keen IO vs USPTO
Same instrument, two spec sheets — measured, not claimed.
Keen IO vs USPTO: common questions
Which is more reliable, Keen IO or USPTO?
Both are neck-and-neck — Keen IO and USPTO 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, Keen IO or USPTO?
Keen IO has the lower median latency in our checks — Keen IO responds in 667 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 Keen IO and USPTO need an API key?
USPTO needs no key, while Keen IO requires a free API key. If you want to start calling without signup, reach for USPTO first.
Can I call Keen IO and USPTO from the browser?
Neither sends browser-friendly CORS headers reliably, so call Keen IO 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 Keen IO and USPTO free for commercial use?
Keen IO 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.