# ILSpy Mcp

> 🔓 UNLEASH ILSpy'S POWER. Reverse-engineer DOTNET code at GOD SPEED. AI-assisted debugging that THINKS with you. Decompile ANYTHING. 🚀

- **Type:** MCP server
- **Install:** `agentstack add mcp-bivex-ilspy-mcp`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [bivex](https://agentstack.voostack.com/s/bivex)
- **Installs:** 0
- **Category:** [Integrations](https://agentstack.voostack.com/c/integrations)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [bivex](https://github.com/bivex)
- **Source:** https://github.com/bivex/ILSpy-Mcp

## Install

```sh
agentstack add mcp-bivex-ilspy-mcp
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# ILSpy MCP Server

A Model Context Protocol (MCP) server that provides .NET assembly decompilation and analysis capabilities.

## What is this?

ILSpy MCP Server enables AI assistants (like Claude Code, Cursor) to decompile and analyze .NET assemblies directly through natural language commands. It integrates [ILSpy](https://github.com/icsharpcode/ILSpy) to provide powerful reverse-engineering capabilities.

## Quick Start

### Prerequisites

- .NET 9.0 SDK or higher
- MCP-compatible client (Claude Code, Cursor, Claude Desktop, etc.)

### Installation

Install as a global dotnet tool from NuGet:

```bash
dotnet tool install -g ILSpyMcp.Server
```

To update to the latest version:

```bash
dotnet tool update -g ILSpyMcp.Server
```

### Configure MCP Client

For **Claude Code**, register the MCP server:

```bash
claude mcp add ilspy-mcp --command "ilspy-mcp" --scope user
```

Or create/update `.mcp.json` in your project root:

```json
{
  "mcpServers": {
    "ilspy-mcp": {
      "type": "stdio",
      "command": "ilspy-mcp",
      "args": []
    }
  }
}
```

For **Cursor**, add to your MCP settings:

```json
{
  "mcpServers": {
    "ilspy-mcp": {
      "command": "ilspy-mcp",
      "args": []
    }
  }
}
```

For **Claude Desktop**, add to `claude_desktop_config.json`:

```json
{
  "mcpServers": {
    "ilspy-mcp": {
      "command": "ilspy-mcp",
      "args": []
    }
  }
}
```

## Usage Examples

### Decompile a Type
```
Decompile the String class from /path/to/System.Runtime.dll
```

### List All Types
```
List all types in the assembly /path/to/MyLibrary.dll
```

### Find a Specific Method
```
Find the CalculateTotal method in /path/to/Calculator.dll
```

### Analyze Type Hierarchy
```
Show me the type hierarchy for ProductService in /path/to/ECommerce.dll
```

### Search Members
```
Search for members containing "Authenticate" in /path/to/Auth.dll
```

## Available Tools

| Tool | Description |
|------|-------------|
| `decompile_type` | Decompile and analyze a .NET type from a DLL |
| `decompile_method` | Decompile and analyze a specific method |
| `list_assembly_types` | List all types in an assembly |
| `analyze_assembly` | Get architectural overview of an assembly |
| `get_type_members` | Get complete API surface of a type |
| `find_type_hierarchy` | Find inheritance relationships |
| `search_members_by_name` | Search for members by name |
| `find_extension_methods` | Find extension methods for a type |

## Configuration

The server can be configured via environment variables:

- `ILSpy__MaxDecompilationSize`: Maximum size of decompiled code in bytes (default: 1048576 = 1 MB)
- `ILSpy__DefaultTimeoutSeconds`: Default timeout for operations in seconds (default: 30)
- `ILSpy__MaxConcurrentOperations`: Maximum number of concurrent operations (default: 10)

## Architecture

This server follows a clean architecture with clear separation of concerns:

- **Domain**: Core business logic and entities
- **Application**: Use cases and application services
- **Infrastructure**: External system adapters (ILSpy, file system)
- **Transport**: MCP protocol layer

## Security

- All operations are read-only (no file modifications)
- Assembly path validation
- Timeout and cancellation support
- Request context propagation

## License

MIT — see [LICENSE](LICENSE) for details.

## Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [bivex](https://github.com/bivex)
- **Source:** [bivex/ILSpy-Mcp](https://github.com/bivex/ILSpy-Mcp)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/mcp-bivex-ilspy-mcp
- Seller: https://agentstack.voostack.com/s/bivex
- Browse the marketplace: https://agentstack.voostack.com/browse

---
Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.