MetalpriceAPI vs National Bank of Poland

Same instrument, two spec sheets — measured, not claimed.

Uptime · 30d
Uptime · 90d98.0%100%
Uptime · 30d96.7%100%
P50 · ms208899
P95 · ms26952087
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

MetalpriceAPI vs National Bank of Poland: common questions

Which is more reliable, MetalpriceAPI or National Bank of Poland?

On our scheduled checks, National Bank of Poland leads on measured uptime — MetalpriceAPI at 98.0% versus National Bank of Poland 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, MetalpriceAPI or National Bank of Poland?

MetalpriceAPI has the lower median latency in our checks — MetalpriceAPI responds in 208 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 MetalpriceAPI and National Bank of Poland need an API key?

National Bank of Poland needs no key, while MetalpriceAPI requires a free API key. If you want to start calling without signup, reach for National Bank of Poland first.

Can I call MetalpriceAPI and National Bank of Poland from the browser?

Yes — both MetalpriceAPI 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 MetalpriceAPI and National Bank of Poland free for commercial use?

MetalpriceAPI 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.