skill-security-check vs URL Safety Validator MCP
skill-security-check is a plugin bundle for AI coding tools published by aliksir. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). URL Safety Validator MCP is an MCP server published by OjasKord. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-26. 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 |  skill-security-check |  URL Safety Validator MCP |
|---|---|---|
| Claude Code: claude-plugins-community | Listed Version: 2.5.0 Forks (GitHub): 2 Stars (GitHub): 4 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 1.2.27 Downloads/month (npm): 322 Downloads/week (npm): 11 Forks (GitHub): 0 Stars (GitHub): 1 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 | skill-security-check | URL Safety Validator MCP |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 4 (better) | 1 (worse) |
| Forks (GitHub) (differs) | 2 (better) | 0 (worse) |
| Last release | Not published | Not published |
| Where it runs (differs) | Installs as a plugin bundle | Remote server (url-safety-validator-mcp-production.up.railway.app) |
| Transport (differs) | Not stated | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 3, secrets among them: 3 |
| Hooks it runs (differs) | 3 | Not published |
| Parts of the bundle (differs) | 4 | Not a bundle |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/aliksir/claude-code-skill-security-check | github.com/ojaskord/url-safety-validator-mcp |
| Changes in the last 7 days | 0 | 0 |
| First seen (differs) | 2026-10-12 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Answered with HTTP 404 (6 days ago) |
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
skill-security-check
Security audit plugin that scans Claude Code skills, hooks, and MCP configurations for threats. Detects 37 attack patterns including prompt injection, data exfiltration, supply chain attacks (ToxicSkills/ClawHavoc), credential theft, reverse shells, backdoor persistence, API endpoint hijacking, Unicode homoglyph attacks, and context window poisoning. Includes runtime hooks for Bash command validation and MCP response inspection.
URL Safety Validator MCP
AI URL safety validator: SAFE/SUSPICIOUS/DANGEROUS verdict, trust score, threat intel.
How to run each
skill-security-check As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install skill-security-check@claude-communityURL Safety Validator MCP As a remote MCP server
claude mcp add --transport http url-safety-validator-mcp https://url-safety-validator-mcp-production.up.railway.appRequires: ANTHROPIC_API_KEY (secret), GOOGLE_SAFE_BROWSING_API_KEY (secret), GOOGLE_WEB_RISK_API_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only URL Safety Validator MCP has a remote endpoint we check. How we check endpoints
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 skill-security-check publish no settings it asks for, so we do not compare settings.
What it can do: skill-security-check · What it can do: URL Safety Validator MCP · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.