CongressInvests vs National Bank of Poland
Same instrument, two spec sheets — measured, not claimed.
CongressInvests vs National Bank of Poland: common questions
Which is more reliable, CongressInvests or National Bank of Poland?
Both are neck-and-neck — CongressInvests and National Bank of Poland 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, CongressInvests or National Bank of Poland?
CongressInvests has the lower median latency in our checks — CongressInvests responds in 615 ms versus National Bank of Poland at 899 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 CongressInvests and National Bank of Poland need an API key?
National Bank of Poland needs no key, while CongressInvests requires a free API key. If you want to start calling without signup, reach for National Bank of Poland first.
Can I call CongressInvests and National Bank of Poland from the browser?
Yes — both CongressInvests and National Bank of Poland 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 CongressInvests and National Bank of Poland free for commercial use?
CongressInvests has unclear commercial terms, and National Bank of Poland 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.