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Ntropy Transaction API v1 vs Tumblr

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

APINtropy Transaction API v1NEW—TumblrREACHABLE—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnoneoauth
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedOAuth — some read routes may be public
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Ntropy Transaction API v1 vs Tumblr: common questions

Which is more reliable, Ntropy Transaction API v1 or Tumblr?

On our scheduled checks, Tumblr leads on measured uptime — Ntropy Transaction API v1 at —% versus Tumblr 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 Ntropy Transaction API v1 and Tumblr need an API key?

Ntropy Transaction API v1 needs no key, while Tumblr requires OAuth. If you want to start calling without signup, reach for Ntropy Transaction API v1 first.

Can I call Ntropy Transaction API v1 and Tumblr from the browser?

Only Tumblr 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 Ntropy Transaction API v1 and Tumblr free for commercial use?

Ntropy Transaction API v1 has unclear commercial terms, and Tumblr 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.