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Fed Treasury vs Frankfurter

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

APIFed TreasuryNEW—FrankfurterHEALTHY—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useyesyes
Data licenseOpen U.S. Government data (public domain)Public data (ECB reference rates)
Free tierFree — no API keyUnlimited — abuse-rate-limited only
Rate limitUnpublishedUnpublished, generous
In directory since2026-07-052026-05-02
operationalpartialdownno data

Fed Treasury vs Frankfurter: common questions

Which is more reliable, Fed Treasury or Frankfurter?

On our scheduled checks, Frankfurter leads on measured uptime — Fed Treasury 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 Fed Treasury and Frankfurter need an API key?

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

Can I call Fed Treasury and Frankfurter from the browser?

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

Are Fed Treasury and Frankfurter free for commercial use?

Fed Treasury allows commercial use on its free tier, 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.