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BuyWhere vs Registrum API

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

APIBuyWhereNEW—Registrum APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

BuyWhere vs Registrum API: common questions

Which is more reliable, BuyWhere or Registrum API?

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

Both ask you to authenticate — BuyWhere uses an API key and Registrum API uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call BuyWhere and Registrum API from the browser?

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

Are BuyWhere and Registrum API free for commercial use?

BuyWhere has unclear commercial terms, and Registrum API 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.