MCP server CX Codex

windbg-mcp — Claude Code MCP server: WinDbg debugging for AI agents

Q: How do I install windbg-mcp in Claude Code?

Run `/plugin marketplace add glslang/windbg-mcp` in the Claude Code chat. The server will appear in the plugin list.

Brings WinDbg engine to AI agents: crash dumps, live user and kernel sessions, Time Travel Debugging, driver IOCTLs.

What windbg-mcp does

The server runs a DbgEng instance and exposes debugging commands over MCP. Agents get user-mode and kernel-mode sessions, can analyze dumps, record TTD traces and step through them. It serves over stdio or listens on HTTP with --listen to reach clients on other machines.

Inside: a supervisor and one engine worker per session. Supports Secure Kernel (VTL1) reads from Hyper-V checkpoints, driver IOCTL exploration, and Microsoft hypervisor attach via KDNET. Kernel attach and TTD recording need Administrator rights.

Runs on Windows x64 only. TTD covers user-mode; kernel debugging requires a stopped target for certain memory operations.

What it helps with

analyze a crash dump and locate the faulting instruction
record a Time Travel Debugging trace and replay a failure
attach to the kernel over KDNET
map a driver's IOCTL surface
read VTL1 memory from a Hyper-V checkpoint

Example prompts for the agent

Attach to dump service_crash.dmp and show the call stack of the crashing thread
Start a TTD recording of app.exe and find where it opens the registry key
Connect to kernel debug profile test-machine and list loaded drivers

How to install windbg-mcp

Install

The MCP registry has no launch command for it: see the repository README

Step by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more

Questions about windbg-mcp

How do I install windbg-mcp in Claude Code?

Run /plugin marketplace add glslang/windbg-mcp in the Claude Code chat. The server will appear in the plugin list.

What does windbg-mcp do?

It gives agents WinDbg debugger commands: dump analysis, kernel attach, Time Travel Debugging, process and kernel memory reads. The DbgEng engine runs on your Windows machine; the agent sends requests to it.

What does windbg-mcp require?

Windows x64 and DbgEng from WinDbg Preview. Kernel attach and TTD recording need Administrator; you can run it as a service with --install-service.

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