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Currencylayer vs IBAN Validation API

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

APICurrencylayerNEW—IBAN Validation APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Currencylayer vs IBAN Validation API: common questions

Which is more reliable, Currencylayer or IBAN Validation API?

On our scheduled checks, IBAN Validation API leads on measured uptime — Currencylayer at —% versus IBAN Validation API 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 Currencylayer and IBAN Validation API need an API key?

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

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

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

Are Currencylayer and IBAN Validation API free for commercial use?

Currencylayer has unclear commercial terms, and IBAN Validation API 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.