Brazil Receita WS vs ONS
Same instrument, two spec sheets — measured, not claimed.
Brazil Receita WS vs ONS: common questions
Which is more reliable, Brazil Receita WS or ONS?
On our scheduled checks, ONS leads on measured uptime — Brazil Receita WS at 70.6% versus ONS 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, Brazil Receita WS or ONS?
Brazil Receita WS has the lower median latency in our checks — Brazil Receita WS responds in 539 ms versus ONS at 732 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 Brazil Receita WS and ONS need an API key?
Neither needs a paid key — Brazil Receita WS is callable with no signup, and ONS is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Brazil Receita WS and ONS from the browser?
Only ONS is browser-friendly — it returns CORS headers over HTTPS. Brazil Receita WS needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Brazil Receita WS and ONS free for commercial use?
Brazil Receita WS has unclear commercial terms, and ONS 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.