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Frankfurter vs ValueRay

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

APIFrankfurterHEALTHY—ValueRayNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licensePublic data (ECB reference rates)Unverified
Free tierUnlimited — abuse-rate-limited onlyFree — limits not published
Rate limitUnpublished, generous50 req/window · 49 remaining
In directory since2026-05-022026-07-05
operationalpartialdownno data

Frankfurter vs ValueRay: common questions

Which is more reliable, Frankfurter or ValueRay?

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

Neither needs a paid key — Frankfurter is callable with no signup, and ValueRay is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Frankfurter and ValueRay from the browser?

Yes — both Frankfurter and ValueRay 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 Frankfurter and ValueRay free for commercial use?

Frankfurter allows commercial use on its free tier, and ValueRay 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.