Jarp MCP Server

MCP server that gives AI agents instant access to decompiled Java code from Maven/Gradle dependencies. Blazing fast Java class analysis for Claude

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What is the Jarp MCP MCP server?

MCP server that gives AI agents instant access to decompiled Java code from Maven/Gradle dependencies. Blazing fast Java class analysis for Claude, Cursor, and other LLM-powered IDEs. Exposed over MCP by the jarp mcp mcp server, that capability becomes something an assistant can invoke while it works, not something you go and do afterwards.

What it actually does

That's it. No installation. No configuration. CFR decompiler bundled.

Its toolset

Everything the assistant can do here goes through one of these:

  • Impact — The Impact tool exposed by this server

Adding it to your client

Installation goes through your MCP client rather than a global install: point it at jarp-mcp on npm and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.

When to reach for it

Among the AI and media services options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Jarp MCP's toolset — Impact — is a fair guide to whether it matches your workflow. It is maintained by terseprompts; worth a glance at recent repository activity before you build anything load-bearing on it.

This entry was verified against Jarp MCP's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.

Caveats

  • It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
  • MCP clients confirm each tool call by default. Leave that on until you have watched what the jarp mcp mcp server does with a few real requests.

Available tools

ToolWhat it does
ImpactThe Impact tool exposed by this server.

How to install the Jarp MCP MCP server

{
  "mcpServers": {
    "jarp-mcp": {
      "command": "npx",
      "args": ["-y", "jarp-mcp"]
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Example prompts to try

  • Use Jarp MCP to Impact.

Frequently asked questions

It connects Jarp MCP to MCP-compatible AI assistants such as Claude and Cursor, exposing 1 tool (Impact) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with Jarp MCP directly.