jdwp-debugging vs JavaLens
jdwp-debugging is a plugin bundle for AI coding tools published by Jan (Novoj) Novotný. Marketplaces we read that list it: 1 (Community GitHub marketplaces). JavaLens is an MCP server published by pzalutski-pixel. Marketplaces we read that list it: 2 (Official MCP Registry, npm registry (MCP servers)). As of our marketplace pass on 2026-10-23. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  JavaLens | |
|---|---|---|
| Community marketplace fgforrest/mcp-jdwp-java | Listed Version: 2.10.1 Forks (GitHub): 6 Stars (GitHub): 32 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 1.5.3 Downloads/month (npm): 1 000 Downloads/week (npm): 444 Forks (GitHub): 13 Stars (GitHub): 45 Not marked · First seen |
| npm registry (MCP servers) | Not listed | Listed Version: 1.5.3 Downloads/month (npm): 1 000 Downloads/week (npm): 444 Forks (GitHub): 13 Stars (GitHub): 45 Not marked · First seen |
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
| Fact | jdwp-debugging | JavaLens |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 2 (better) |
| Stars (GitHub) (differs) | 32 (worse) | 45 (better) |
| Forks (GitHub) (differs) | 6 (worse) | 13 (better) |
| Last release (differs) | Not published | 2026-10-19 |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (javalens-mcp) |
| Transport (differs) | Not stated | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | 2, secrets among them: 0 | 3, secrets among them: 0 |
| Hooks it runs (differs) | 1 | Not published |
| Parts of the bundle (differs) | 3 | Not a bundle |
| Licence (differs) | Not stated | MIT |
| Repository (differs) | github.com/fgforrest/mcp-jdwp-java | github.com/pzalutski-pixel/javalens-mcp |
| Changes in the last 7 days (differs) | 2 | 4 |
| First seen (differs) | 2026-10-18 | 2026-10-11 |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
jdwp-debugging
Java JDWP debugger via MCP — set breakpoints, inspect runtime state, evaluate expressions, mutate variables, catch exceptions at throw site, trace execution with logpoints.
JavaLens
75 semantic Java analysis tools via Eclipse JDT: navigation, refactoring, code intelligence.
How to run each
jdwp-debugging As a Claude Code plugin
/plugin marketplace add fgforrest/mcp-jdwp-java
/plugin install jdwp-debugging@mcp-jdwp-javaJavaLens As a local MCP server: npm package
claude mcp add --transport stdio javalens -- npx -y javalens-mcpCommands 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
Only jdwp-debugging asks for
MCP_TIMEOUTMCP_TOOL_TIMEOUT
Only JavaLens asks for
JAVALENS_LOG_LEVELJAVALENS_TIMEOUT_SECONDSJAVA_PROJECT_PATH
Settings as each marketplace publishes them. Asking for fewer is not better in itself.
What it can do: jdwp-debugging · What it can do: JavaLens · Compare two other plugins
Data comes from public marketplace files in GitHub repositories of their authors. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Package data comes from the public npm registry (registry.npmjs.org). Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.