Lets AI agents read the real source of any Maven dependency, decompiled from ~/.m2 or Central.
To add Maven Decoder to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 7 environment variables, listed below.
Install
npx -y maven-decoder-mcp@1.3.2Environment variables
MAVEN_REPOSITORYSet in your MCP configMAVEN_REMOTE_REPOSSet in your MCP configMAVEN_REMOTE_USERNAMESet in your MCP configMAVEN_REMOTE_PASSWORDSet in your MCP configMAVEN_OFFLINESet in your MCP configMAVEN_AUTO_DOWNLOADSet in your MCP configMAVEN_DECODER_CACHE_DIRSet in your MCP configInstall with your client
claude mcp add maven-decoder --env MAVEN_REPOSITORY=<YOUR_MAVEN_REPOSITORY> --env MAVEN_REMOTE_REPOS=<YOUR_MAVEN_REMOTE_REPOS> --env MAVEN_REMOTE_USERNAME=<YOUR_MAVEN_REMOTE_USERNAME> --env MAVEN_REMOTE_PASSWORD=<YOUR_MAVEN_REMOTE_PASSWORD> --env MAVEN_OFFLINE=<YOUR_MAVEN_OFFLINE> --env MAVEN_AUTO_DOWNLOAD=<YOUR_MAVEN_AUTO_DOWNLOAD> --env MAVEN_DECODER_CACHE_DIR=<YOUR_MAVEN_DECODER_CACHE_DIR> -- npx -y maven-decoder-mcp@1.3.2
Run this in a terminal to add the server to Claude Code.
What this does
Maven Decoder exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
MAVEN_REPOSITORY MAVEN_REMOTE_REPOS MAVEN_REMOTE_USERNAME MAVEN_REMOTE_PASSWORD MAVEN_OFFLINE MAVEN_AUTO_DOWNLOAD MAVEN_DECODER_CACHE_DIR
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install Maven Decoder?
Run the Claude Code command in the install section to add Maven Decoder to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with Maven Decoder?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to Maven Decoder as well.
Does Maven Decoder need an API key?
Yes. Before it can run, set these environment variables: MAVEN_REPOSITORY, MAVEN_REMOTE_REPOS, MAVEN_REMOTE_USERNAME, MAVEN_REMOTE_PASSWORD, MAVEN_OFFLINE, MAVEN_AUTO_DOWNLOAD, MAVEN_DECODER_CACHE_DIR. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
Is this your MCP server?
Claim this listing to see its traffic, fix details yourself, and skip the review queue on future updates.
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