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SEO Audit (SEOmator)

Runs the SEOmator CLI to audit any site against 373 rules across 20 categories and diff two audits to see what a deploy changed.

Marketing & SEOIntermediate★ 441⑂ 61AI score 9/10Last updated: Sep 22, 2026

What it does

This skill drives the SEOmator CLI to run a full website audit and return a token-efficient, AI-friendly report (--format llm).

  • Checks 373 rules across 20 categories: core SEO, performance (LCP/CLS/TTFB), links, images, security headers and SSL, crawlability, structured data, JavaScript rendering, accessibility, content, hreflang, AI/GEO readiness, and more
  • Produces a 0–100 health score with an A–F grade, plus per-category pass/warn/fail breakdowns
  • Lists affected URLs and concrete fix suggestions, sorted critical-first
  • seomator compare diffs two saved audits by rule ID, so a newly broken rule and a newly fixed one are reported separately instead of cancelling out; --fail-on-regression turns it into a CI gate
  • Checks it could not measure are reported as unmeasured with weight 0, so scores are never inflated by skipped work

Who it's for

  • SEO specialists and marketers who audit client or company sites regularly
  • Web developers who want to know whether a deploy hurt SEO or rendering
  • Frontend engineers validating that SSR/CSR content is visible to crawlers
  • Teams wiring a site-quality gate into CI/CD

Examples

  1. Quick check — "Find SEO issues on example.com" → seomator audit https://example.com --format llm --no-cwv
  2. Deep crawl — "Audit up to 100 pages" → seomator audit https://example.com --crawl -m 100 --format llm to also measure click depth and orphan pages
  3. Before/after a deploy — audit, deploy, re-audit, then seomator compare example.com --json to see exactly which rules regressed
  4. Debugging a blank page — seomator audit https://example.com -c js --format llm surfaces console errors and failed subresource requests

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/seo-skills/seo-audit-skill/HEAD/SKILL.md

What I want: (describe your task here)

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↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

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Install the skill I found on Claude Skill Mart.
Copy the SKILL.m folder from the GitHub repo seo-skills/seo-audit-skill into my ~/.claude/skills/seo-audit/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/seo-skills/seo-audit-skill.git ~/.claude/skills/seo-audit && npm install -g @seomator/seo-audit

⚠ This is a third-party skill. Check the source repository before installing.

  1. Confirm you have Node.js 20.3 or newer: run node -v
  2. Install the SEOmator CLI globally: npm install -g @seomator/seo-audit
  3. Verify your environment: run seomator self doctor to check the Node version, Chrome/Chromium detection (needed for Core Web Vitals and JS rendering), and write access to ~/.seomator
  4. Install the skill: git clone https://github.com/seo-skills/seo-audit-skill.git ~/.claude/skills/seo-audit
  5. Restart Claude Code, then ask something like "audit my site's SEO" and the skill will trigger automatically
  6. (Optional) Inside your project folder run seomator init to create a seomator.toml config; presets are available, e.g. seomator init --preset blog or --preset ci
View source on GitHub ↗License: MIT