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Registrum API vs Sofiaplan

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

APIRegistrum APINEW—SofiaplanNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Registrum API vs Sofiaplan: common questions

Which is more reliable, Registrum API or Sofiaplan?

On our scheduled checks, Sofiaplan leads on measured uptime — Registrum API at —% versus Sofiaplan 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 Registrum API and Sofiaplan need an API key?

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

Can I call Registrum API and Sofiaplan from the browser?

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

Are Registrum API and Sofiaplan free for commercial use?

Registrum API has unclear commercial terms, and Sofiaplan 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.