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Billplz vs Frankfurter

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

APIBillplzDEAD0FrankfurterHEALTHY86
Uptime · 30d
Uptime · 90d0.0%88.2%
Uptime · 30d0.0%86.7%
P50 · ms—370
P95 · ms—4986
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

Billplz vs Frankfurter: common questions

Which is more reliable, Billplz or Frankfurter?

On our scheduled checks, Frankfurter leads on measured uptime — Billplz at 0.0% 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.

Do Billplz and Frankfurter need an API key?

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

Can I call Billplz and Frankfurter from the browser?

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

Are Billplz and Frankfurter free for commercial use?

Billplz 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.