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IBAN Validation API vs Polish Bank Branches

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

APIIBAN Validation APIHEALTHY90Polish Bank BranchesHEALTHY80
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms8612310
P95 · ms21514135
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

IBAN Validation API vs Polish Bank Branches: common questions

Which is more reliable, IBAN Validation API or Polish Bank Branches?

Both are neck-and-neck — IBAN Validation API and Polish Bank Branches 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, IBAN Validation API or Polish Bank Branches?

IBAN Validation API has the lower median latency in our checks — IBAN Validation API responds in 861 ms versus Polish Bank Branches at 2310 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 IBAN Validation API and Polish Bank Branches need an API key?

Neither needs a paid key — IBAN Validation API is callable with no signup, and Polish Bank Branches is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call IBAN Validation API and Polish Bank Branches from the browser?

Yes — both IBAN Validation API and Polish Bank Branches 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 IBAN Validation API and Polish Bank Branches free for commercial use?

IBAN Validation API has unclear commercial terms, and Polish Bank Branches 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.