RSQ API vs User Agent Lookup API
Same instrument, two spec sheets — measured, not claimed.
RSQ API vs User Agent Lookup API: common questions
Which is more reliable, RSQ API or User Agent Lookup API?
Both are neck-and-neck — RSQ API and User Agent Lookup API 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, RSQ API or User Agent Lookup API?
User Agent Lookup API has the lower median latency in our checks — RSQ API responds in 783 ms versus User Agent Lookup API at 426 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 RSQ API and User Agent Lookup API need an API key?
Neither needs a paid key — RSQ API is callable with no signup, and User Agent Lookup API is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call RSQ API and User Agent Lookup API from the browser?
Neither sends browser-friendly CORS headers reliably, so call RSQ API and User Agent Lookup API from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are RSQ API and User Agent Lookup API free for commercial use?
RSQ API has unclear commercial terms, and User Agent Lookup API 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.