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Nager.Date vs Ntropy Transaction API v1

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

APINager.DateHEALTHY100Ntropy Transaction API v1HEALTHY79
Uptime · 30d
Uptime · 90d100%98.0%
Uptime · 30d100%96.7%
P50 · ms561223
P95 · ms5534484
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree, no keyFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Nager.Date vs Ntropy Transaction API v1: common questions

Which is more reliable, Nager.Date or Ntropy Transaction API v1?

On our scheduled checks, Nager.Date leads on measured uptime — Nager.Date at 100% versus Ntropy Transaction API v1 at 98.0% 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, Nager.Date or Ntropy Transaction API v1?

Nager.Date has the lower median latency in our checks — Nager.Date responds in 56 ms versus Ntropy Transaction API v1 at 1223 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 Nager.Date and Ntropy Transaction API v1 need an API key?

Neither needs a paid key — Nager.Date is callable with no signup, and Ntropy Transaction API v1 is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Nager.Date and Ntropy Transaction API v1 from the browser?

Only Nager.Date is browser-friendly — it returns CORS headers over HTTPS. Ntropy Transaction API v1 needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Nager.Date and Ntropy Transaction API v1 free for commercial use?

Nager.Date has unclear commercial terms, and Ntropy Transaction API v1 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.