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Municipal Finance API vs National Bank of Poland

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

APIMunicipal Finance APINEW—National Bank of PolandNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Municipal Finance API vs National Bank of Poland: common questions

Which is more reliable, Municipal Finance API or National Bank of Poland?

On our scheduled checks, National Bank of Poland leads on measured uptime — Municipal Finance API at —% versus National Bank of Poland at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Municipal Finance API and National Bank of Poland need an API key?

Neither needs a paid key — Municipal Finance API is callable with no signup, and National Bank of Poland is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Municipal Finance API and National Bank of Poland from the browser?

Yes — both Municipal Finance API 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 Municipal Finance API and National Bank of Poland free for commercial use?

Municipal Finance API 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.