Cataas vs STAPI
Same instrument, two spec sheets — measured, not claimed.
Cataas vs STAPI: common questions
Which is more reliable, Cataas or STAPI?
Both are neck-and-neck — Cataas and STAPI 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, Cataas or STAPI?
Cataas has the lower median latency in our checks — Cataas responds in 601 ms versus STAPI at 1003 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 Cataas and STAPI need an API key?
Neither needs a paid key — Cataas is callable with no signup, and STAPI is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Cataas and STAPI from the browser?
Yes — both Cataas and STAPI send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are Cataas and STAPI free for commercial use?
Cataas has unclear commercial terms, and STAPI 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.