maven-decoder-mcp

Overview

The maven-decoder-mcp server provides comprehensive tools for Java AI coding agents to inspect, search, and decompile Maven .m2 JARs. It offers deep inspection capabilities including metadata extraction, dependency tree analysis, source code extraction, and class information retrieval. The server supports multiple Java decompilers and provides intelligent pagination and summarization for large responses.

Try asking AI

After installing, here are 6 things you can ask your AI assistant:

• list_artifacts

  List artifacts in Maven repository with filtering

  Try:List all artifacts in the Maven repositoryTry:Find all spring framework artifacts
• analyze_jar

  Analyze jar file structure and contents

  Try:Analyze the structure of spring-core-5.3.21.jarTry:What's inside commons-lang3-3.12.0.jar?
• extract_class_info

  Get detailed information about Java classes

  Try:Get detailed info about org.springframework.core.io.ResourceTry:Show methods and fields in java.util.HashMap
• get_dependencies

  Retrieve Maven dependencies from POM files

  Try:Get all dependencies of org.springframework.boot:spring-boot-starter-webTry:What dependencies does com.fasterxml.jackson.core:jackson-databind have?
• search_classes

  Search for classes across all jars

  Try:Find all classes containing 'Http' in their nameTry:Search for classes that implement Runnable
• extract_source_code

  Decompile and extract Java source code

  Try:Decompile the class com.example.MyServiceTry:Extract source code for org.springframework.core.env.Environment
• extract_jar_resource

  Extract text resources such as .proto files, services, and metadata

  Try:Extract .proto files from com.example:protobuf-lib:1.0.0Try:Find service definitions in my-app-1.0.0.jar
• compare_versions

  Compare different versions of artifacts

  Try:Compare versions 5.2.0 and 5.3.21 of spring-coreTry:What changed between jackson-databind 2.12.0 and 2.13.0?
• get_dependency_tree

  Get complete dependency tree

  Try:Show the complete dependency tree for spring-boot-starter-webTry:Get all transitive dependencies of com.google.guava:guava
• find_dependents

  Find artifacts that depend on a specific artifact

  Try:Find all artifacts that depend on log4jTry:Which projects in my repo use commons-lang3?
• get_version_info

  Get all available versions of an artifact

  Try:List all available versions of spring-bootTry:Show me every version of jackson-databind published
• extract_method_info

  Extract specific method information from Java classes

  Try:Extract methods matching 'get*' from the ObjectMapper classTry:Find all public static methods in java.util.Collections

Comparable tools

Installation

curl -fsSL https://raw.githubusercontent.com/salitaba/maven-decoder-mcp/main/install.sh | bash

# Install uv (if not installed)
curl -Ls https://astral.sh/uv/install.sh | sh
# Ensure your shell PATH is updated

# Run the server via uvx
uvx maven-decoder-mcp

npm install -g maven-decoder-mcp
maven-decoder-mcp

docker run --rm -it \
  -v ~/.m2:/home/mcpuser/.m2 \
  -v $(pwd):/workspace \
  ali79taba/maven-decoder-mcp:latest

{
  "mcpServers": {
    "maven-decoder": {
      "command": "uvx",
      "args": ["maven-decoder-mcp"]
    }
  }
}

FAQ

What decompilers are supported?

The server supports CFR, Fernflower, Procyon, and javap for analyzing bytecode when source jars are unavailable.

How do I handle large responses?

The server automatically implements pagination for responses exceeding 50KB and provides summarization for large text content.

Compare maven-decoder-mcp with