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Microsoft Security Response Center (MSRC) vs SniffCat

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

APIMicrosoft Security Response Center (MSRC)HEALTHY92SniffCatREACHABLE83
Uptime · 30d
Uptime · 90d100%83.3%
Uptime · 30d100%83.3%
P50 · ms538290
P95 · ms1107598
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverified
Free tierFree — no key required
Rate limitUnpublishedRetry-After: 24s
In directory since2026-07-052026-08-19
operationalpartialdownno data

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

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

On our scheduled checks, Microsoft Security Response Center (MSRC) leads on measured uptime — Microsoft Security Response Center (MSRC) at 100% versus SniffCat at 83.3% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Microsoft Security Response Center (MSRC) or SniffCat?

SniffCat has the lower median latency in our checks — Microsoft Security Response Center (MSRC) responds in 538 ms versus SniffCat at 290 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 Microsoft Security Response Center (MSRC) and SniffCat need an API key?

Microsoft Security Response Center (MSRC) needs no key, while SniffCat requires a free API key. If you want to start calling without signup, reach for Microsoft Security Response Center (MSRC) first.

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

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

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

Microsoft Security Response Center (MSRC) has unclear commercial terms, and SniffCat allows commercial use on its free tier. 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.