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OkSurf vs Registrum API

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

APIOkSurfHEALTHY91Registrum APIHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms624246
P95 · ms18701553
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

OkSurf vs Registrum API: common questions

Which is more reliable, OkSurf or Registrum API?

Both are neck-and-neck — OkSurf and Registrum API each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, OkSurf or Registrum API?

Registrum API has the lower median latency in our checks — OkSurf responds in 624 ms versus Registrum API at 246 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 OkSurf and Registrum API need an API key?

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

Can I call OkSurf and Registrum API from the browser?

Neither sends browser-friendly CORS headers reliably, so call OkSurf 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 OkSurf and Registrum API free for commercial use?

OkSurf 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.