Microsoft Security Response Center (MSRC)
LiveLast verified 24 Sept 2026
Official Microsoft security bulletin and CVE data in CVRF/CSAF format, no key needed.
Example request
curl -s 'https://api.msrc.microsoft.com/cvrf/v2.0/updates'
Free tier, in plain English
Free and keyless for reading security update data; no published usage cap was found.
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