The Hub for Claude Code
Plugins, skills, and MCP tools for Claude Code, with skills that also run in Cursor, Grok, and any SKILL.md-aware agent. Every listing is security-checked before it reaches you.
/plugin marketplace add sigistry/marketplaceAudited before it’s listed
Every verified plugin passes eight static checks: safe hooks, injection-free skills, least-privilege agents, no secrets, honest manifests. Run by an open-source script, published as machine-readable data.
How verification works →Bring the catalog into your agent
Connect the Sigistry MCP server so Claude Code, Cursor, or any MCP client can search and install plugins right in the conversation.
claude mcp add --transport http sigistry https://sigistry.com/mcpFree Tools
Free, no sign-up. The plugin checker runs in your browser; the SEO, mobile, and writing audits run as Claude Code commands.
Claude SEO Checker
Check any site’s AI discoverability: llms.txt, AI-crawler access, and answer-engine readiness for ChatGPT, Claude, and Perplexity.
See what it audits →Plugin Checker
Run our eight security checks against any public Claude Code plugin repository before you install it.
Check a plugin →Responsive Design Checker
Score a site’s mobile responsiveness and see which fixes are safe versus risky, by blast radius, before you touch the CSS.
See what it audits →AI Slop Checker
Catch the tells that make writing read like an AI wrote it, cliché clusters, promotional register, em-dash and emoji overuse, and rewrite them.
See what it catches →Featured This Week
View all 28 →Six offline StoreKit and Xcode pre-flight checks for iOS subscription apps: bundled .storekit file, distantFuture expiry, product ID drift, local-only intro offers, export compliance key, prices in metadata.
Gets an unfamiliar repo running locally by diagnosing and fixing broken setup, decodes opaque build systems, and does task-scoped change localization and end-to-end flow tracing, so you're productive on day one
Static, no-database-connection guardrails for schema and query work: rewrites unsafe migrations into zero-downtime expand-contract steps, hunts ORM N+1 queries in your diff, interprets pasted EXPLAIN plans, and flags schema anti-patterns
Triages failing GitHub Actions runs, hardens Dockerfiles, pre-flights Kubernetes manifests before they reach the cluster, and drafts blameless postmortems from incident evidence
Connect Claude to Google Search Console, GA4 and IndexNow with live data: guided credential setup, evidence-based SEO audits, sitemap health checks, and delta URL submissions. One service account, unlimited sites.
Recover the original goal of a long Claude Code or Codex session with a local, inspectable recovery anchor.
Use Cases
View all →Full Testing Pipeline
Generate comprehensive test suites, audit code quality, and auto-generate documentation -all in one workflow.
Codebase Onboarding
Analyze legacy code, get interactive tutorials, and produce up-to-date docs for new team members.
Legacy Modernization
Map business logic, audit issues, and generate safety-net tests before refactoring legacy systems.
News & Guides
View all →Contribute
Sigistry is free, open source, and community-run. Three ways to make it better:
Submit your work
Ship a plugin or skill, pass the eight-check verification, and earn a badge you can embed in your README.
Get verifiedImprove the methodology
Every check is open source. Read the verifier, challenge a rule, or propose a new screen. Pull requests are welcome.
Open the repo →Report a problem
A listed plugin misbehaving, a stale badge, or something our checks missed? Tell us and we act on it.
Contact us →