# Java JAR Decompiler & Reverse Engineering MCP Server

> Java JAR Decompiler & Reverse Engineering MCP Server — sapyyy-reverse-engineering-mcp-server. Use this tool when you need to decompile and reverse engineer Java JAR files to understand their internal structure and functionality. It solves problems related to code obfuscation, debugging, and legacy system maintenance by providing multi-engine decompilation, deobfuscation, and bytecode comparison capabilities. It takes Java JAR files as input and outputs decompiled code, Maven projects, and compared bytecode results.

Canonical page: https://skillsregistry.net/skills/sapyyy-reverse-engineering-mcp-server  
JSON: https://api.skillsregistry.net/v1/skills/sapyyy-reverse-engineering-mcp-server

## Description

Enables decompilation and reverse engineering of Java JAR files through multi-engine decompilation, candidate evaluation, Maven project structuring, AST-based deobfuscation, and bytecode comparison.

## Trust

- **Trust score (0–1):** 0.66
- **Verification tier:** scanned
- **Last scanned:** 2026-09-03

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** file-system
- **Updated:** 2026-09-03

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/d8vgzzl8a2)
- **Repository:** <https://github.com/sapyyy/reverse-engineering-mcp-server>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "sapyyy-reverse-engineering-mcp-server"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/sapyyy-reverse-engineering-mcp-server` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/sapyyy-reverse-engineering-mcp-server/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt