shipapis
StarSubmit an APISubmit API

Frankfurter vs GOV.UK Pay API

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

APIFrankfurterHEALTHY—GOV.UK Pay APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licensePublic data (ECB reference rates)Unverified
Free tierUnlimited — abuse-rate-limited onlyFree tier — API key required
Rate limitUnpublished, generousUnpublished
In directory since2026-05-022026-07-05
operationalpartialdownno data

Frankfurter vs GOV.UK Pay API: common questions

Which is more reliable, Frankfurter or GOV.UK Pay API?

On our scheduled checks, GOV.UK Pay API leads on measured uptime — Frankfurter at —% versus GOV.UK Pay 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 Frankfurter and GOV.UK Pay API need an API key?

Frankfurter needs no key, while GOV.UK Pay API requires a free API key. If you want to start calling without signup, reach for Frankfurter first.

Can I call Frankfurter and GOV.UK Pay API from the browser?

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

Are Frankfurter and GOV.UK Pay API free for commercial use?

Frankfurter allows commercial use on its free tier, and GOV.UK Pay 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.