Patch Tuesday MCP

I built an open-source MCP server for Microsoft Patch Tuesday that lets AI assistants like Claude, Copilot, ChatGPT, and more answer patch questions directly from official MSRC data.

Every Patch Tuesday, security teams ask the same questions: what changed, what affects us, what is being exploited, and what needs to be patched first?

Ask things like:

“Summarize this month’s Patch Tuesday”

“Which of these CVEs are on the CISA KEV list?”

“Show me CVEs with an exploitation probability above 50%”

“What older patches does KB5094123 replace?”

“What Critical CVEs hit Windows Server 2022 this month?”

What makes it different: most vulnerability tools can look up a CVE, but they have no concept of a monthly Microsoft release, a KB article, or a product family.

This server parses the full MSRC CVRF documents, so it can answer the questions Microsoft shops actually ask on the second Tuesday of every month.

It is built around the data sources teams already trust:

• Official MSRC Security Update Guide API: Microsoft’s source for Security Update Guide and CVRF data
• EPSS scores from FIRST.org: daily-updated probability each CVE gets exploited in the next 30 days
• CISA KEV integration: confirmed-exploited CVEs with federal remediation due dates
• Supersedence chains: walks Microsoft’s “this KB replaces that KB” links so your assistant never recommends a stale patch
• Results ranked by real-world urgency: KEV/exploited → EPSS → severity → CVSS

Zero API keys, zero accounts: everything comes from public MSRC,

Remote MCP server endpoint: