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IBAN Validation API vs TaxID

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

APIIBAN Validation APIHEALTHY90TaxIDHEALTHY89
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms861729
P95 · ms21511556
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

IBAN Validation API vs TaxID: common questions

Which is more reliable, IBAN Validation API or TaxID?

Both are neck-and-neck — IBAN Validation API and TaxID 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 TaxID?

TaxID has the lower median latency in our checks — IBAN Validation API responds in 861 ms versus TaxID at 729 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 TaxID need an API key?

IBAN Validation API needs no key, while TaxID requires a free API key. If you want to start calling without signup, reach for IBAN Validation API first.

Can I call IBAN Validation API and TaxID from the browser?

Only IBAN Validation API is browser-friendly — it returns CORS headers over HTTPS. TaxID needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are IBAN Validation API and TaxID free for commercial use?

IBAN Validation API has unclear commercial terms, and TaxID 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.