MCP Server for WinDbg Crash Analysis

Name: MCP Server for WinDbg Crash Analysis
Author: svnscha

by svnschaversion 1.6.0i★ –iRuns on your computer

Registry nameio.github.svnscha/mcp-windbg

Install

Overview

Description from the maker (original English)

A Model Context Protocol server for Windows crash dump analysis using WinDbg/CDB

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio, Streamable HTTP
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: CDB_PATH, _NT_SYMBOL_PATH

You need

PyPIPython’s uv installed (for the uvx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "windbg": {
      "command": "uvx",
      "args": [
        "mcp-windbg"
      ],
      "env": {
        "CDB_PATH": "your-value",
        "_NT_SYMBOL_PATH": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add windbg --env CDB_PATH=your-value --env _NT_SYMBOL_PATH=your-value -- uvx mcp-windbg

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "windbg": {
      "command": "uvx",
      "args": [
        "mcp-windbg"
      ],
      "env": {
        "CDB_PATH": "your-value",
        "_NT_SYMBOL_PATH": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "windbg": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "mcp-windbg"
      ],
      "env": {
        "CDB_PATH": "your-value",
        "_NT_SYMBOL_PATH": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

CDB_PATH env
Custom path to cdb.exe (optional)
_NT_SYMBOL_PATH env
Symbol path for Windows debugging (optional, defaults to Microsoft symbol server)

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account svnscha, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 18349 servers in this category
Published to the registry more recently than 74% of the other 18349 servers in this category
Basic checks equal to or better than 100% of the other 18349 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is MCP Server for WinDbg Crash Analysis safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.6.0) reached the registry 15 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, arr-mcp

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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Runs on your computer★ 440MITUpdated 14 months ago

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Runs in the cloud★ 211Updated 2 days ago

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arr-mcp

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

MCP Server for WinDbg Crash Analysis

A Model Context Protocol server that bridges AI models with WinDbg for crash dump analysis, user-mode remote debugging, and kernel debugging.

[!TIP]

Looking for AI debugging built into WinDbg itself? Microsoft now ships an official

WinDbg MCP, starting with WinDbg 1.2610.1001.0. You enable it in WinDbg's MCP service

settings, and chat with your active debugging session from VS Code with GitHub Copilot or

from the GitHub Copilot CLI. If that is what you want, start there:

- Introducing WinDbg MCP (announcement)

- Set up WinDbg MCP and the overview

- Get the latest WinDbg

This project is an independent, community-built alternative. It runs cdb.exe / kd.exe

headless, so it fits when you want to use another MCP client, drive a debugger from another machine over HTTP, or script triage across many

dumps without opening the WinDbg UI.

Overview

This server drives the Windows debuggers - CDB for user mode (dumps and -remote) and KD for kernel targets (-k) - so you can debug in natural language: *"Show me the call stack and explain this access violation"* or *"Open a kernel session and tell me which driver bugchecked."*

It is not a magical auto-fix. It is a Python wrapper around cdb.exe / kd.exe that lets an LLM run real debugger commands and reason about the output.

Features

Crash dump analysis - open a .dmp/.mdmp/.hdmp and get automated triage (!analyze -v, stacks, modules, threads) in a single call.
User-mode remote debugging - attach to a live cdb/WinDbg debug server (-remote) over TCP, a named pipe, or COM, and break in on demand.
Kernel debugging - attach to a kernel target (-k, driven by kd.exe) over KDNET, a named pipe, or serial; the server waits for the target and breaks in for you.
Run any WinDbg/KD command - drive an open session with arbitrary commands (kb, !process 0 0, !heap, lm, ...) described in natural language.
Session ids - every open returns a session id; several sessions (dumps, remote, kernel) can be open at once and are addressed independently.
Resilient live sessions - per-call timeouts, and a slow live command that outruns its timeout is broken into with CTRL+BREAK and the session resynchronized instead of wedging.
Multi-dump triage - discover and compare many dumps across a directory.
Text filter hooks - a --filter-script can redact PII/secrets from tool arguments and output before they leave the machine.
stdio or HTTP - run locally over stdio, or as a streamable-HTTP service you drive from another machine.

Use cases

You have	You want to	Guide
A `.dmp` from a crash or a blue screen	Root-cause it: exception or bugcheck, faulting frame, why it happened	Analyze a crash dump
A live user-mode process (via `cdb -server`)	Break in and inspect a hang or live state	Debug a remote target
A KD-enabled machine or VM	Debug drivers, bugchecks, and boot-time issues	Debug a kernel target
A folder full of dumps	Triage the batch and find the common signature	Triage multiple dumps
A debugging host, but you work elsewhere	Drive it over HTTP from another machine	Debug from another machine
Dumps with secrets or PII	Scrub tool output before it leaves the box	Redact sensitive data

Tools

Every open_* tool returns an opaque `session_id` (e.g. cdb-1a2b3c4d); pass it to the matching run_*, close_*, send_ctrl_break, and wait_for_break calls. User-mode targets (dumps and -remote) run under cdb.exe; kernel targets and kernel dumps run under kd.exe.

Tool	Purpose
`list_dumps`	List crash dump files in a directory
`open_cdb_dump`	Open and triage a crash dump
`open_cdb_remote`	Attach to a user-mode remote debug server (`-remote`)
`open_kd_session`	Attach to a kernel target (`-k`, KDNET / named pipe / serial)
`open_kd_dump`	Open and triage a kernel crash dump (`MEMORY.DMP`, minidump)
`run_cdb_command`	Run a command on a user-mode session
`run_kd_command`	Run a command on a kernel session
`close_cdb_session`	Close a user-mode session
`close_kd_session`	Close a kernel session (resumes the target machine)
`send_ctrl_break`	Break into a running live session
`wait_for_break`	Wait for a target you resumed with `g` to stop again

Parameters, timeouts, and the built-in triage prompts are in the tools reference.

Quick start

[!NOTE]

Claude Code in enterprise environments: when managed settings define allowedMcpServers,

plugin-bundled MCP servers may be silently skipped (Claude Code issue #32882).

I recommend installing and registering the server manually,

then optionally adding the skills or agents plugin.

The server must still be permitted by your organization's MCP policy.

Prerequisites

Windows with Debugging Tools for Windows or WinDbg from the Microsoft Store, which ship cdb.exe and kd.exe (auto-detected).
Any MCP-compatible client (Claude Code, GitHub Copilot, Claude Desktop, Cursor, Windsurf, Cline, ...).

Python is not a prerequisite in itself. Each route below states what it needs.

Install in Claude Code

Install the server plugin if needed, then optionally add skills, agents, or both:

Plugin	Server	Included workflows
`mcp-windbg-uvx`	Launched by the plugin with uvx	MCP tools only
`mcp-windbg-skills`	Uses the uvx plugin or your own MCP connection	Four optional skills
`mcp-windbg-agents`	Uses the uvx plugin or your own MCP connection	Optional `crash-analyst` agent

Server with uvx

The shortest path: two lines, no pip install, no MCP configuration to edit. Adds the eleven tools, with symbols preconfigured. Skills and agents are installed separately.

/plugin marketplace add svnscha/mcp-windbg

/plugin install mcp-windbg-uvx@mcp-windbg

Needs uv, which supplies uvx: winget install astral-sh.uv. The plugin uses it to fetch the pinned server from PyPI on first use, so there is nothing else to install. See the plugin README for symbols and options.

Registering the server yourself

If you would rather not use the plugin, or you already run the package:

pip install mcp-windbg

claude mcp add mcp-windbg -s user -e _NT_SYMBOL_PATH="SRV*C:\Symbols*https://msdl.microsoft.com/download/symbols" -- python -m mcp_windbg

Needs Python 3.10 or higher. Add either optional plugin below for guided workflows or an agent.

Skills for an existing server

After installing the uvx plugin or registering mcp-windbg yourself, optionally add the four skills:

/plugin marketplace add svnscha/mcp-windbg

/plugin install mcp-windbg-skills@mcp-windbg

Invoke /mcp-windbg-skills:analyze-dump, /mcp-windbg-skills:debug-remote, /mcp-windbg-skills:kernel-debug, or /mcp-windbg-skills:windbg-doctor. This plugin uses your configured MCP connection and adds no server, runtime, symbol settings, or crash-analyst agent. It works with a native executable, Python installation, or HTTP service exposing the mcp-windbg tools. Install this plugin alongside uvx for the server and skills together, or omit it to use just the tools. When upgrading from a version that bundled skills, install this plugin to keep the workflows; their invocation prefix changes from /mcp-windbg: to /mcp-windbg-skills:. The server's built-in MCP prompts remain available independently of these plugins. See the plugin guide for updating or switching plugins.

Agents for an existing server

/plugin marketplace add svnscha/mcp-windbg

/plugin install mcp-windbg-agents@mcp-windbg

Ask: *"Use the mcp-windbg-agents:crash-analyst agent on C:\dumps\app.dmp"*. It investigates the dump and returns a verdict, evidence, and next steps through your existing MCP connection. It requires neither uvx nor the skills plugin. When upgrading from a version that bundled the agent, install this plugin to keep it.

Install without Python

Every release attaches mcp-windbg.exe: one signed executable carrying its own interpreter and every dependency. cdb.exe is still required. Point your client's command at the file and give it no args.

The release also publishes SHA256SUMS, and the binary is code signed, so both are checkable:

(Get-FileHash .\mcp-windbg.exe -Algorithm SHA256).Hash

Get-AuthenticodeSignature .\mcp-windbg.exe | Format-List Status, SignerCertificate

Status should read Valid. The signer is Liasoft GmbH, which sponsors the signing certificate; the project is written by Sven Scharmentke.

Install in another client

pip install mcp-windbg

Needs Python 3.10 or higher. Then point the client at python -m mcp_windbg. For VS Code (GitHub Copilot), press F1 and select MCP: Open User Configuration to enable it in every workspace:

"servers": { "mcp_windbg": { "type": "stdio", "command": "python", "args": ["-m", "mcp_windbg"], "env": { "_NT_SYMBOL_PATH": "SRV*C:\\Symbols*https://msdl.microsoft.com/download/symbols" } } } }

See the client configuration guide for Claude Desktop, Copilot CLI, Autohand Code, HTTP, and from-source setups.

Start debugging

Restart your client, then ask for what you want:

Analyze the crash dump at C:\dumps\app.dmp

Connect to tcp:Port=5005,Server=192.168.0.100 and show me the current thread state Open a kernel session on net:port=50000,key=1.2.3.4, run !analyze -v, and tell me which driver bugchecked

Server options (--cdb-path, --kd-path, --symbols-path, --filter-script, --transport, ...) are documented in the [command-line reference](

Only the beginning is shown; read the rest in the repo

MCP Server for WinDbg Crash Analysis

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

arr-mcp

README from the maker

MCP Server for WinDbg Crash Analysis

Overview

Features

Use cases

Tools

Quick start

Install in Claude Code

Server with uvx

Registering the server yourself

Skills for an existing server

Agents for an existing server

Install without Python

Install in another client

Start debugging