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Microlink.io vs Registrum API

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

APIMicrolink.ioNEW—Registrum APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseN/A — returns metadata extracted from the URL you passUnverified
Free tierFree tier — no key required (Pro plans need a key)Free tier — API key required
Rate limitFree tier is rate-limited per day (see pricing)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Microlink.io vs Registrum API: common questions

Which is more reliable, Microlink.io or Registrum API?

On our scheduled checks, Registrum API leads on measured uptime — Microlink.io 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 Microlink.io and Registrum API need an API key?

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

Can I call Microlink.io and Registrum API from the browser?

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

Are Microlink.io and Registrum API free for commercial use?

Microlink.io 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.