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Currencylayer vs Fed Treasury

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

APICurrencylayerNEW—Fed TreasuryNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedOpen U.S. Government data (public domain)
Free tierFree tier — key may be requiredFree — no API key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Currencylayer vs Fed Treasury: common questions

Which is more reliable, Currencylayer or Fed Treasury?

On our scheduled checks, Fed Treasury leads on measured uptime — Currencylayer at —% versus Fed Treasury 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 Currencylayer and Fed Treasury need an API key?

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

Can I call Currencylayer and Fed Treasury from the browser?

Neither sends browser-friendly CORS headers reliably, so call Currencylayer and Fed Treasury from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Currencylayer and Fed Treasury free for commercial use?

Currencylayer has unclear commercial terms, and Fed Treasury 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.