skill-security-check vs io.github.robertoyanguas-ops/prompt-guard-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). io.github.robertoyanguas-ops/prompt-guard-mcp is an MCP server published by robertoyanguas-ops. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-28. 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 | |
|---|---|---|
| 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: 1.1.1 No figure published 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 | io.github.robertoyanguas-ops/prompt-guard-mcp |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 4 | No figure on GitHub |
| Forks (GitHub) (differs) | 2 | No figure on GitHub |
| Last release (differs) | Not published | 2026-10-13 |
| Where it runs (differs) | Installs as a plugin bundle | Remote server (prompt-guard-72343955726.us-central1.run.app/mcp/prompt-guard) |
| Transport (differs) | Not stated | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| 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 | Not stated |
| Changes in the last 7 days | 0 | 0 |
| First seen (differs) | 2026-10-12 | 2026-10-13 |
| Endpoint at the last check (differs) | no remote endpoint we check | Responded 4 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.
io.github.robertoyanguas-ops/prompt-guard-mcp
Scans untrusted web pages, emails, or tool outputs for prompt injections and returns sanitized tex
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-communityio.github.robertoyanguas-ops/prompt-guard-mcp As a remote MCP server
claude mcp add --transport http prompt-guard-mcp https://prompt-guard-72343955726.us-central1.run.app/mcp/prompt-guardCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only io.github.robertoyanguas-ops/prompt-guard-mcp has a remote endpoint we check. How we check endpoints
Tools each declares
Neither the marketplaces of skill-security-check nor its endpoint list any 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: skill-security-check · What it can do: io.github.robertoyanguas-ops/prompt-guard-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.