Javadocs vs Semgrep Guardian
Javadocs is an MCP server published by docker. Marketplaces we read that list it: 1 (Docker MCP Catalog). Semgrep Guardian is a plugin bundle for AI coding tools published by semgrep. Marketplaces we read that list it: 3 (Claude Code: claude-plugins-official, Claude Code: claude-plugins-community, Community GitHub marketplaces). As of our marketplace pass on 2026-10-19. 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 |  Javadocs |  Semgrep Guardian |
|---|---|---|
| Docker MCP Catalog | Listed Version: not stated No figure published Not marked · First seen |
Not listed |
| Claude Code: claude-plugins-official | Not listed | Listed Version: 2.7.0 Forks (GitHub): 7 Stars (GitHub): 17 Not marked · First seen |
| Claude Code: claude-plugins-community | Not listed | Listed Version: 2.1.4 Forks (GitHub): 7 Stars (GitHub): 17 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 | Javadocs | Semgrep Guardian |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 3 (better) |
| Stars (GitHub) (differs) | No figure on GitHub | 17 |
| Forks (GitHub) (differs) | No figure on GitHub | 7 |
| Last release (differs) | Not published | 2026-10-16 |
| Where it runs (differs) | Remote server (www.javadocs.dev/mcp) | Installs as a plugin bundle |
| Transport (differs) | Streamable HTTP | Not stated |
| Tools it declares (differs) | 8 | Not published |
| Environment variables it asks for | Not published | Not published |
| Hooks it runs (differs) | Not published | 8 |
| Parts of the bundle (differs) | Not a bundle | 9 |
| Licence (differs) | Apache-2.0 | Not stated |
| Repository (differs) | Not stated | github.com/semgrep/mcp-marketplace |
| Changes in the last 7 days (differs) | 0 | 6 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | Responded 5 days ago | no remote endpoint we check |
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
Javadocs
Access to Java, Kotlin, and Scala library documentation.
Semgrep Guardian
Semgrep catches security vulnerabilities in real-time and guides Claude to write secure code from the start.
How to run each
Javadocs As a remote MCP server
claude mcp add --transport http javadocs https://www.javadocs.dev/mcpSemgrep Guardian As a Claude Code plugin
/plugin install semgrep@claude-plugins-officialCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only Javadocs has a remote endpoint we check. How we check endpoints
Tools each declares
The marketplaces of Semgrep Guardian publish no list of tools, so we do not compare tools.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: Javadocs · What it can do: Semgrep Guardian · Compare two other plugins
Data comes from the Docker MCP Catalog (desktop.docker.com/mcp/catalog) and Docker Hub. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-official/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Data comes from public marketplace files in GitHub repositories of their authors. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.