I've published a new skill to the MoltSets Skills Library: an SEO website audit for Claude. Give it a URL and it fetches the page, checks it against a full SEO checklist, and returns a prioritised table of what to fix and why. No setup beyond the skill itself.

What it checks

The audit covers the areas that actually move rankings:

  • Indexability and crawlability — robots meta, robots.txt, canonical tags, HTTPS, sitemap inclusion
  • Title tags and meta descriptions
  • Heading structure
  • Content quality and search intent match
  • Image alt text and file naming
  • Internal linking and site structure
  • Structured data (Schema.org)
  • Mobile and UX signals
  • Core Web Vitals, pulled from Google's PageSpeed Insights API
  • Social sharing metadata

How it scores findings

Every issue gets a Severity rating (how broken it is) and an Effect rating (how much fixing it would help). The two combine into a priority score, so the output is a ranked table rather than a wall of undifferentiated notes:

ID  Severity  Effect  Issue                    Recommendation
1   Critical  High    Page has no title tag    Add a unique, descriptive title (~50-60 characters)
2   High      High    No H1 on the page        Add a single H1 matching the page's primary topic

You can then work through the list by ID: "let's fix #3" pulls up the fuller explanation and the fix, with code where relevant.

Why a skill and not a tool

A skill is just a defined procedure Claude reads before acting, rather than a hardcoded feature. That means it's transparent — you can read exactly what it checks and how it scores — and it's editable. Fork it, adjust the severity weightings, add a check specific to your site.

It also degrades gracefully: if PageSpeed Insights isn't reachable, the audit continues without performance data instead of failing outright.

Get it

The skill is free to download from the MoltSets Skills Library: library.moltsets.com/skills/seo-website-audit