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.

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/plugin marketplace add sigistry/marketplace
  • 4,377check results published
  • 29full verification runs
  • 28 + 58plugins and skills verified

In February 2026, 341 compromised skills shipped through one unverified registry. Static checks are point-in-time by nature; continuous re-verification is our answer.

Verified by Sigistry

Audited 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. External repos are verified at a pinned commit and re-checked on every change, so a badge can never silently drift from the code it vouches for.

Verified by Sigistry badge
How verification works →Get your plugin verified →
MCP Server

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/mcp
Why this matters →

Free Tools

Free, no sign-up. The plugin checker runs in your browser; the SEO, mobile, and writing audits run as Claude Code commands.

SEO

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 security

Plugin Checker

Run our eight security checks against any public Claude Code plugin repository before you install it.

Check a plugin →
Mobile

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 →
Writing

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

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AI
a11y-i18n-remediator
Sigistry

Goes past detecting accessibility and localization issues to fixing them: cross-element ARIA and keyboard-focus remediation, color-contrast rewrites, hardcoded-string extraction, ICU MessageFormat correctness, and RTL readiness

accessibilitya11ywcag+9
5 cmds2 agents3 skills
LP
lila-perimenopause
Tidalflow Health

Evidence-aware perimenopause and menopause guidance covering symptoms, stages, testing, treatment options, lifestyle approaches, supplements, and appointment preparation, with clear medical-safety boundaries.

perimenopausemenopausewomen's health+3
R
records
MedVertical

Validate FHIR R4 resources, diagnose Implementation Guide projects, explain conformance issues, and generate reviewed CI quality gates.

fhirfhir validationfhir validator+18
CI
ci-incident-medic
Sigistry

Triages failing GitHub Actions runs, hardens Dockerfiles, pre-flights Kubernetes manifests before they reach the cluster, and drafts blameless postmortems from incident evidence

devopssreci-cd+7
5 cmds3 agents4 skills
SV
search-visibility-kit
Ezequiel Scholz

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.

seogoogle-search-consolegoogle-analytics+5
PB
plugin-benchmarker
Sigistry

Benchmark Claude Code plugins by validating structure, reviewing skill quality, and comparing with-skill vs without-skill performance with per-file KEEP/TRIM/DELETE recommendations

benchmarkpluginskill+5
1 cmd2 agents

Use Cases

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Full Testing Pipeline

Generate comprehensive test suites, audit code quality, and auto-generate documentation -all in one workflow.

test-generatorcode-auditordoc-generator

Codebase Onboarding

Analyze legacy code, get interactive tutorials, and produce up-to-date docs for new team members.

legacy-analyzercode-tutordoc-generator

Legacy Modernization

Map business logic, audit issues, and generate safety-net tests before refactoring legacy systems.

legacy-analyzercode-auditortest-generator

News & Guides

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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 verified

Improve 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 →