arcsecond.io vs USPTO
Same instrument, two spec sheets — measured, not claimed.
arcsecond.io vs USPTO: common questions
Which is more reliable, arcsecond.io or USPTO?
Both are neck-and-neck — arcsecond.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, arcsecond.io or USPTO?
arcsecond.io has the lower median latency in our checks — arcsecond.io responds in 587 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 arcsecond.io and USPTO need an API key?
Neither needs a paid key — arcsecond.io 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 arcsecond.io and USPTO from the browser?
Only arcsecond.io is browser-friendly — it returns CORS headers over HTTPS. USPTO needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are arcsecond.io and USPTO free for commercial use?
arcsecond.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.