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Coinnect vs Frankfurter

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

APICoinnectHEALTHY79FrankfurterHEALTHY86
Uptime · 30d
Uptime · 90d98.0%88.2%
Uptime · 30d98.3%86.7%
P50 · ms1419370
P95 · ms37274986
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, Coinnect leads on measured uptime — Coinnect at 98.0% versus Frankfurter at 88.2% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Coinnect or Frankfurter?

Frankfurter has the lower median latency in our checks — Coinnect responds in 1419 ms versus Frankfurter at 370 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 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.