notgate/dnspy-mcp

Developer tools

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Repository Install

Headless CLI reflection debugger for .NET assemblies with MCP server support

概要

A Model Context Protocol server for static .NET assembly analysis powered by ICSharpCode.Decompiler (dnSpyEx engine). Exposes decompilation, IL disassembly, metadata inspection, and protection analysis as MCP tools over stdio. Never executes target assemblies. - .NET 8 SDK or later - Compatible MCP client (Claude Desktop, Cursor, or any client supporting MCP stdio transport) detect_anti_debug, detect_anti_tamper, and get_protection_report perform static analysis only. The target assembly is never loaded as a .NET type, never JIT-compiled, and never executed. Analysis uses ICSharpCode.Decompiler's type system and PE reader exclusively. - P/Invoke declarations targeting known anti-debug APIs (IsDebuggerPresent, NtQueryInformationProcess, etc.) - Managed API usage (System.Diagnostics.Debugger.IsAttached, etc.

README

以下は原文 README の抜粋です。原文を見る。

dnSpy-MCP

Requirements

.NET 8 SDK or later
Compatible MCP client (Claude Desktop, Cursor, or any client supporting MCP stdio transport)

Installation

git clone https://github.com/ZeraTS/dnSpy-MCP.git
cd dnSpy-MCP
dotnet build src/DnSpyMcp/DnSpyMcp.csproj -c Release

Claude Desktop Configuration

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "dnspy-mcp": {
      "command": "dotnet",
      "args": ["/path/to/src/DnSpyMcp/bin/Release/net8.0/DnSpyMcp.dll"]
    }
  }
}

Tools

Tool	Description	Key Parameters
`get_pe_info`	Get PE/COFF header information, assembly metadata, and target framework	`assemblyPath`
`get_resources`	List all manifest resources embedded in the assembly	`assemblyPath`
`resolve_token`	Resolve a metadata token (hex, e.g. `0x02000001`) to its definition	`assemblyPath`, `tokenHex`
`list_pinvokes`	List all P/Invoke (DllImport) declarations in the assembly	`assemblyPath`
`find_attributes`	Find all types and methods decorated with a specific attribute	`assemblyPath`, `attributeName`
`get_methods_for_type`	Get all methods defined on a specific type	`assemblyPath`, `typeName`
`decompile_assembly`	Decompile the entire assembly to C# source code	`assemblyPath`
`decompile_type`	Decompile a specific type to C# source code	`assemblyPath`, `typeName`
`decompile_method`	Decompile a specific method to C# source code	`assemblyPath`, `typeName`, `methodName`
`dump_il`	Dump IL (CIL) disassembly for the whole assembly, a type, or a specific method	`assemblyPath`, `typeName?`, `methodName?`
`inspect_type`	Inspect a type’s structure: fields, methods, properties, interfaces, optionally with source	`assemblyPath`, `typeName`, `includeSource?`
`inspect_method`	Inspect a specific method: signature, parameters, decompiled source, optionally IL	`assemblyPath`, `typeName`, `methodName`, `includeSource?`, `includeIL?`
`list_types`	List all type definitions in the assembly	`assemblyPath`
`find_methods`	Find methods in the assembly, optionally filtered by name pattern	`assemblyPath`, `pattern?`
`search_strings`	Search for string literals in the assembly’s decompiled source	`assemblyPath`, `pattern`, `useRegex?`
`search_members`	Search for types, methods, fields, and properties by name pattern	`assemblyPath`, `pattern`
`set_breakpoint`	Set a virtual breakpoint on a method at a specific IL offset	`assemblyPath`, `typeName`, `methodName`, `ilOffset`
`list_breakpoints`	List all active virtual breakpoints

GitHub で README 全文を見る

インストール

This server does not publish a one-line install command.

Open the repository installation guide MCP 初心者？mcpskill.org のガイドから始めましょう →

設定

{
  "mcpServers": {
    "dnspy-mcp": {
      "command": "dotnet",
      "args": ["/path/to/src/DnSpyMcp/bin/Release/net8.0/DnSpyMcp.dll"]
    }
  }
}