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Fixer vs IBAN Validation API

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

APIFixerNEW—IBAN Validation APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
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

Fixer vs IBAN Validation API: common questions

Which is more reliable, Fixer or IBAN Validation API?

On our scheduled checks, IBAN Validation API leads on measured uptime — Fixer 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 Fixer and IBAN Validation API need an API key?

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

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

Yes — both Fixer and IBAN Validation API 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 Fixer and IBAN Validation API free for commercial use?

Fixer 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.