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Authentication vs Microsoft Security Response Center (MSRC)

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

APIAuthenticationNEW—Microsoft Security Response Center (MSRC)NEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — no key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Authentication vs Microsoft Security Response Center (MSRC): common questions

Which is more reliable, Authentication or Microsoft Security Response Center (MSRC)?

On our scheduled checks, Microsoft Security Response Center (MSRC) leads on measured uptime — Authentication at —% versus Microsoft Security Response Center (MSRC) 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 Authentication and Microsoft Security Response Center (MSRC) need an API key?

Neither needs a paid key — Authentication is callable with no signup, and Microsoft Security Response Center (MSRC) is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Authentication and Microsoft Security Response Center (MSRC) from the browser?

Neither sends browser-friendly CORS headers reliably, so call Authentication and Microsoft Security Response Center (MSRC) from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Authentication and Microsoft Security Response Center (MSRC) free for commercial use?

Authentication has unclear commercial terms, and Microsoft Security Response Center (MSRC) 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.