ITIS vs USPTO
Same instrument, two spec sheets — measured, not claimed.
ITIS vs USPTO: common questions
Which is more reliable, ITIS or USPTO?
On our scheduled checks, USPTO leads on measured uptime — ITIS at 97.1% 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, ITIS or USPTO?
USPTO has the lower median latency in our checks — ITIS responds in 1767 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 ITIS and USPTO need an API key?
Neither needs a paid key — ITIS 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 ITIS and USPTO from the browser?
Neither sends browser-friendly CORS headers reliably, so call ITIS 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 ITIS and USPTO free for commercial use?
ITIS 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.