Koskamo

Maven Decoder MCP

Lets AI agents read the actual source of any Maven dependency by decompiling JARs from ~/.m2 or Maven Central. It supports deep inspection of JAR files, dependency resolution, source code extraction, class information retrieval, and version comparison to identify breaking changes between library versions.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Maven Decoder MCP logo, by salitabaCommunity listingLocal stdioSource reviewed; not executedPublished by salitaba
Vendor documentation

Checks and signals

Each line is separate evidence, not a trust score.

  • Popularity 20 GitHub stars

What you can do with it

  • Inspect and decompile Maven JARs for Java AI coding agents
  • Compare versions to report breaking API changes
  • Extract source code or decompile bytecode for internal artifacts
  • Search for classes, methods, and dependencies across artifacts

Source and maintenance

Community listingRegistry 1.3.2MIT
mcp-registry: io.github.salitaba/maven-decoder-mcp@1.3.2Source repositoryProject website
Last repository push
Latest release
v1.3.2
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

maven-decoder-mcp 1.3.2

npmnpx
maven-decoder-mcp package definition
{
  "version": "1.3.2",
  "transport": "stdio",
  "identifier": "maven-decoder-mcp",
  "runtimeHint": "npx",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "MAVEN_REPOSITORY",
      "format": "filepath",
      "description": "Path to the local Maven repository. Defaults to ~/.m2/repository."
    },
    {
      "name": "MAVEN_REMOTE_REPOS",
      "format": "string",
      "description": "Comma or whitespace separated list of remote Maven repository base URLs."
    },
    {
      "name": "MAVEN_REMOTE_USERNAME",
      "format": "string",
      "description": "Username for authenticating against private remote Maven repositories."
    },
    {
      "name": "MAVEN_REMOTE_PASSWORD",
      "format": "string",
      "description": "Password or token for authenticating against private remote Maven repositories."
    },
    {
      "name": "MAVEN_OFFLINE",
      "format": "boolean",
      "description": "Set to true to disable all network access and use only the local repository."
    },
    {
      "name": "MAVEN_AUTO_DOWNLOAD",
      "format": "boolean",
      "description": "Whether to automatically download missing artifacts from remote repositories. Defaults to true."
    },
    {
      "name": "MAVEN_DECODER_CACHE_DIR",
      "format": "filepath",
      "description": "Override directory used for decompilation and metadata caches."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · repository · passed · metadata changed · updated
  • · backfill · recorded · Pre-expansion baseline; unobserved rich metadata remains unknown

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "maven-decoder-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "maven-decoder-mcp@1.3.2"
      ],
      "env": {
        "MAVEN_REPOSITORY": "<YOUR_MAVEN_REPOSITORY>",
        "MAVEN_REMOTE_REPOS": "<YOUR_MAVEN_REMOTE_REPOS>",
        "MAVEN_REMOTE_USERNAME": "<YOUR_MAVEN_REMOTE_USERNAME>",
        "MAVEN_REMOTE_PASSWORD": "<YOUR_MAVEN_REMOTE_PASSWORD>",
        "MAVEN_OFFLINE": "<YOUR_MAVEN_OFFLINE>",
        "MAVEN_AUTO_DOWNLOAD": "<YOUR_MAVEN_AUTO_DOWNLOAD>",
        "MAVEN_DECODER_CACHE_DIR": "<YOUR_MAVEN_DECODER_CACHE_DIR>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "maven-decoder-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "maven-decoder-mcp@1.3.2"
      ],
      "env": {
        "MAVEN_REPOSITORY": "<YOUR_MAVEN_REPOSITORY>",
        "MAVEN_REMOTE_REPOS": "<YOUR_MAVEN_REMOTE_REPOS>",
        "MAVEN_REMOTE_USERNAME": "<YOUR_MAVEN_REMOTE_USERNAME>",
        "MAVEN_REMOTE_PASSWORD": "<YOUR_MAVEN_REMOTE_PASSWORD>",
        "MAVEN_OFFLINE": "<YOUR_MAVEN_OFFLINE>",
        "MAVEN_AUTO_DOWNLOAD": "<YOUR_MAVEN_AUTO_DOWNLOAD>",
        "MAVEN_DECODER_CACHE_DIR": "<YOUR_MAVEN_DECODER_CACHE_DIR>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "maven-decoder-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "maven-decoder-mcp@1.3.2"
      ],
      "env": {
        "MAVEN_REPOSITORY": "<YOUR_MAVEN_REPOSITORY>",
        "MAVEN_REMOTE_REPOS": "<YOUR_MAVEN_REMOTE_REPOS>",
        "MAVEN_REMOTE_USERNAME": "<YOUR_MAVEN_REMOTE_USERNAME>",
        "MAVEN_REMOTE_PASSWORD": "<YOUR_MAVEN_REMOTE_PASSWORD>",
        "MAVEN_OFFLINE": "<YOUR_MAVEN_OFFLINE>",
        "MAVEN_AUTO_DOWNLOAD": "<YOUR_MAVEN_AUTO_DOWNLOAD>",
        "MAVEN_DECODER_CACHE_DIR": "<YOUR_MAVEN_DECODER_CACHE_DIR>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "maven-decoder-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "maven-decoder-mcp@1.3.2"
      ],
      "env": {
        "MAVEN_REPOSITORY": "<YOUR_MAVEN_REPOSITORY>",
        "MAVEN_REMOTE_REPOS": "<YOUR_MAVEN_REMOTE_REPOS>",
        "MAVEN_REMOTE_USERNAME": "<YOUR_MAVEN_REMOTE_USERNAME>",
        "MAVEN_REMOTE_PASSWORD": "<YOUR_MAVEN_REMOTE_PASSWORD>",
        "MAVEN_OFFLINE": "<YOUR_MAVEN_OFFLINE>",
        "MAVEN_AUTO_DOWNLOAD": "<YOUR_MAVEN_AUTO_DOWNLOAD>",
        "MAVEN_DECODER_CACHE_DIR": "<YOUR_MAVEN_DECODER_CACHE_DIR>"
      }
    }
  }
}

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