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Coinnect vs Frankfurter

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

APICoinnectNEW—FrankfurterHEALTHY—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedPublic data (ECB reference rates)
Free tierFree tier — API key requiredUnlimited — abuse-rate-limited only
Rate limitUnpublishedUnpublished, generous
In directory since2026-07-052026-05-02
operationalpartialdownno data

Coinnect vs Frankfurter: common questions

Which is more reliable, Coinnect or Frankfurter?

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

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

Can I call Coinnect and Frankfurter from the browser?

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

Are Coinnect and Frankfurter free for commercial use?

Coinnect has unclear commercial terms, and Frankfurter allows commercial use on its free tier. 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.