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Microsoft Security Response Center (MSRC) vs URLScan.io

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

APIMicrosoft Security Response Center (MSRC)NEW—URLScan.ioNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no key requiredFree tier — key may be required
Rate limitUnpublished30 req/window · 29 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

Microsoft Security Response Center (MSRC) vs URLScan.io: common questions

Which is more reliable, Microsoft Security Response Center (MSRC) or URLScan.io?

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

Microsoft Security Response Center (MSRC) needs no key, while URLScan.io 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 URLScan.io from the browser?

Neither sends browser-friendly CORS headers reliably, so call Microsoft Security Response Center (MSRC) and URLScan.io 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 URLScan.io free for commercial use?

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