Comparison

mcp-debugger vs karellen-jdb-mcp

mcp-debugger is no longer listed on any marketplace we read: these are its last known data, as of 2026‑10‑17.

mcp-debugger is a plugin bundle for AI coding tools published by bherbruck. No marketplace we read lists it any more. karellen-jdb-mcp is a plugin bundle for AI coding tools published by karellen. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). As of our marketplace pass on 2026-10-21. A plugin in this pair is no longer listed on any marketplace we read, so search engines are asked not to index the page.

Where each is published

Where each is published
Marketplace	mcp-debugger	karellen-jdb-mcp
Community marketplace bherbruck/mcp-debugger	Removed on 2026-10-17 Version: 1.2.0 Forks (GitHub): 0 Stars (GitHub): 2 Not marked · First seen 2026-10-14	Not listed
Claude Code: claude-plugins-community	Not listed	Listed Version: 0.0.4 Forks (GitHub): 4 Stars (GitHub): 4 Not marked · First seen 2026-10-11

Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.

The facts side by side

mcp-debugger vs karellen-jdb-mcp
Fact	mcp-debuggerno longer listed · 2026-10-17	karellen-jdb-mcp
Marketplaces that list it (differs)	0	1
Stars (GitHub) (differs)	2	4
Forks (GitHub) (differs)	0	4
Last release	Not published	Not published
Where it runs	Installs as a plugin bundle	Installs as a plugin bundle
Transport	Not stated	Not stated
Tools it declares	Not published	Not published
Environment variables it asks for (differs)	1, secrets among them: 0	Not published
Hooks it runs (differs)	Not published	3
Parts of the bundle (differs)	5	6
Licence (differs)	MIT	Apache-2.0
Repository (differs)	github.com/bherbruck/mcp-debugger	github.com/karellen/karellen-jdb-mcp
Changes in the last 7 days (differs)	2	0
First seen (differs)	2026-10-14	2026-10-11

Lines where the two differ have a tinted background and bold values. No value is marked better or worse: a plugin no marketplace lists any more is shown with its last known data, which we do not rank against current figures.

What to use instead of mcp-debugger

Plugins still listed whose own names, descriptions, tools and skills are closest in meaning to it. Comparable, not endorsed.

debugium io.github.Algiras/debugium

AI-driven live debugger with MCP bridge for Python, JS, TS, Rust, Java, C/C++

by Algiras · MCP server

Listed on: Official MCP Registry · Describes nearly the same job
aidb io.github.ai-debugger-inc/aidb

Debug any supported language with breakpoints, variable/state inspection, and stepping.

by ai-debugger-inc · MCP server

Listed on: Official MCP Registry · Describes nearly the same job
Qwen DAP MCP

Native runtime debugging via DAP-to-MCP for crashes, hangs, dumps, symbols, and forensics.

by SLP-DEV1 · MCP server

Listed on: Official MCP Registry · Describes nearly the same job
python-debugger

PyCharm-like Python debugging with breakpoints, stepping, variable inspection, and stack navigation

by Alon Wolenitz · Plugin bundle

Listed on: Community GitHub marketplaces · Describes nearly the same job
debug-skill

Interactively debug source code — set breakpoints, step through execution, inspect live variables, evaluate expressions, and trace root causes.

by AlmogBaku · Plugin bundle

Listed on: Claude Code: claude-plugins-community, Community GitHub marketplaces · Describes nearly the same job
debugging-toolkit

Interactive debugging, developer experience optimization, and smart debugging workflows

by Seth Hobson · Plugin bundle

Listed on: Community GitHub marketplaces · Describes nearly the same job

Its card, with similar plugins by marketplace

What each says it does

mcp-debugger

In its own words, on Community GitHub marketplaces:

Multi-language debugging via DAP - debug Python, JavaScript/TypeScript, Go, and Rust

karellen-jdb-mcp

In its own words, on Claude Code: claude-plugins-community:

JDB (Java Debugger) plugin for Claude Code. Attach to running JVMs via JDWP and debug interactively with breakpoints, watchpoints, exception breakpoints, stepping, expression evaluation, thread inspection, stack navigation, and class introspection. ### Features - **Connect & Launch**: Attach to any JVM started with JDWP, or launch one directly with `jdb_launch` - **Multi-session**: Debug multiple JVMs simultaneously on different ports - **Breakpoints & Watchpoints**: Line/method breakpoints, field watchpoints, exception breakpoints with caught/uncaught filtering - **Execution Control**: Step in, step over, step out, continue, suspend/resume threads - **Inspection**: Evaluate expressions, dump objects, view locals, list loaded classes/methods/fields - **Stack Navigation**: Walk the call stack, move up/down frames, pop/re-enter frames - **Concurrency**: Thread listing, lock/monitor inspection for deadlock analysis - **Tracing & Monitoring**: Trace method entries/exits, auto-execute commands on each stop - **JDK

How to run each

mcp-debugger

No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.

karellen-jdb-mcp As a Claude Code plugin

Claude Code

/plugin marketplace add anthropics/claude-plugins-community
/plugin install karellen-jdb-mcp@claude-community

Commands built only from what the marketplaces declare; the full set for every client is on each card.

Tools each declares

Neither one's marketplaces publish a list of tools, so there is nothing to compare.

Settings each asks for

The marketplaces of karellen-jdb-mcp publish no settings it asks for, so we do not compare settings.

What it can do: mcp-debugger · What it can do: karellen-jdb-mcp · Compare two other plugins

Data comes from public marketplace files in GitHub repositories of their authors. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Figures come from our own regular passes over the marketplaces, last read on 2026-10-21. We publish no contact details for plugin publishers.