Dejared FAQs

Question 1

What is Dejared?

Accepted Answer

Dejared is a Model Context Protocol (MCP) server that enables exploration, analysis, and decompilation of Java JAR files. It's designed to integrate with AI-powered development tools, IDEs, and CLI assistants to provide deep insights into Java bytecode.

Question 2

What key functionalities does Dejared offer for JAR files?

Accepted Answer

Dejared allows you to browse JAR contents (packages, classes, resources), search classes by name and string literals in bytecode, extract comprehensive class metadata without decompilation, and decompile `.class` files into readable Java source code using multiple powerful engines.

Question 3

Which decompiler engines are supported by Dejared?

Accepted Answer

Dejared supports three robust decompiler engines: CFR (default, reliable general-purpose), Vineflower (modern fork of FernFlower, handles newer Java features), and Procyon (an alternative for handling edge cases).

Question 4

How do I integrate Dejared with my development environment?

Accepted Answer

Dejared integrates seamlessly with various MCP-compatible IDEs and CLI tools (e.g., Amp, Claude Code, JetBrains IDEs, Copilot CLI) by configuring it as an MCP server. It's typically run via an `npx` command (Node.js) but can also be executed directly as a Java JAR.

Question 5

What are the prerequisites for running Dejared?

Accepted Answer

To run Dejared via its npm package wrapper, you need Node.js 18 or later and Java 17 or later (JRE is sufficient). If running the server JAR directly, only Java 17+ is required.

Dejared

Dejared

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