patch-tuesday

Query Microsoft Patch Tuesday security updates (MSRC) with EPSS and CISA KEV enrichment

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What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    Query Microsoft Patch Tuesday security updates (MSRC) with EPSS and CISA KEV enrichment

    How to connect

    How to connect patch-tuesday to Claude

    The server address to paste into Claude settings:

    https://patch-tuesday-mcp.agreeabledesert-d0b8e491.eastus2.azurecontainerapps.io/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect patch-tuesday to ChatGPT

    The server address to paste into ChatGPT settings:

    https://patch-tuesday-mcp.agreeabledesert-d0b8e491.eastus2.azurecontainerapps.io/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect patch-tuesday to Cursor

    The server address to paste into Cursor settings:

    https://patch-tuesday-mcp.agreeabledesert-d0b8e491.eastus2.azurecontainerapps.io/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (1)

    Raw names from tools/list. Only developers need these.

    msrc_searchSearch Microsoft security updates (Patch Tuesday) from the official MSRC API. Combines keyword search, CVE/KB lookup, and product/severity/exploitation filtering into a single flexible tool. All filter parameters are optional and can be combined. When no filters are provided, returns the most urgent vulnerabilities from the most recent *released* Patch Tuesday (CISA-KEV- listed or exploited first, then by EPSS exploitation probability, severity, and CVSS score). The upcoming month's document exists before its Patch Tuesday but only holds early Chromium/third-party and out-of-band entries; it is skipped by default and served only when requested via month=. Results are enriched with EPSS scores (FIRST.org daily exploit prediction, 0-1) and CISA KEV (Known Exploited Vulnerabilities) catalog data when available. Use this tool to: - Get the latest Patch Tuesday overview (include_stats=True, limit=0) - Browse the most urgent fixes this month (no filters) - Look up a specific CVE with full detail (cve="CVE-2026-41108") -- works across all months, returns KBs, affected products, CVSS, description, FAQs, EPSS score, and KEV status - Find which CVEs a KB article fixes (kb="5094123" or kb="KB5094123") -- scans recent months, or a specific month when combined with month= - Look up many KBs in one call (kb=["5094123", "KB5094127", ...], up to 30) -- e.g. a machine's installed-update list; returns one grouped per-KB result entry each, with per-KB found/not-found status - Check whether a KB has been superseded by newer patches (kb="5087538", include_chain=True) -- walks Microsoft-stated supersedence links - See what Microsoft has confirmed an update breaks (kb=..., include_known_issues=True) -- known issues from the KB's public support page: symptoms, workarounds, and the resolving update when stated - See what an update changes (kb=..., include_update_summary=True) -- the KB support page's summary and improvements highlights, beyond the security fixes alread