# SEO Check > On-page SEO audit of any URL: title/description lengths, canonical, robots meta, Open Graph, Twitter card, JSON-LD structured data, heading structure, image alts, and hreflang sanity — graded A–F. Playwright MCP only, no signup. Triggers: "SEO check https://...", "check my meta tags", "is this page indexable?". - Skill: `help-me-test/seo-check` (Agent Skill) - Install (CLI): `npx skillmds@latest add help-me-test/seo-check` - Raw SKILL.md: https://api.skillmd.com/api/skills/help-me-test/seo-check/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Marketing & Growth - Author: help-me-test (https://skillmd.com/u/help-me-test) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/help-me-test/seo-check --- # SEO Check Grade the on-page SEO of any URL. No signup required. ## Prerequisites - **Playwright MCP** (bundled with Claude Code) ## Trigger - "SEO check https://example.com" - "Check my meta tags" - "Is this page indexable?" - "Audit my Open Graph and structured data" ## Workflow 1. Navigate with `mcp__playwright__browser_navigate` (rendering matters: this captures the DOM after JS, which is what Google indexes after the render phase). 2. Extract everything in one `mcp__playwright__browser_evaluate`: ```javascript () => { const meta = n => document.querySelector(`meta[name="${n}"], meta[property="${n}"]`)?.content ?? null; const hs = [...document.querySelectorAll('h1,h2,h3,h4,h5,h6')].map(h => +h.tagName[1]); let skips = 0; hs.reduce((p, c) => { if (c > p + 1) skips++; return c; }, hs[0] ?? 0); return { title: document.title, titleLen: document.title.length, description: meta('description'), descLen: (meta('description') ?? '').length, canonical: document.querySelector('link[rel="canonical"]')?.href ?? null, robots: meta('robots'), lang: document.documentElement.lang || null, og: { title: meta('og:title'), description: meta('og:description'), image: meta('og:image') }, twitterCard: meta('twitter:card'), ldJson: [...document.querySelectorAll('script[type="application/ld+json"]')].map(s => { try { const d = JSON.parse(s.textContent); return (Array.isArray(d) ? d : [d]).map(x => x['@type'] ?? 'missing @type'); } catch { return 'INVALID JSON'; } }), h1s: [...document.querySelectorAll('h1')].map(h => h.textContent.trim().slice(0, 80)), headingSkips: skips, imgs: { total: document.images.length, missingAlt: [...document.images].filter(i => !i.hasAttribute('alt')).length }, hreflang: [...document.querySelectorAll('link[rel="alternate"][hreflang]')].map(l => ({ lang: l.hreflang, href: l.href })), }; } ``` 3. Evaluate each check (standards inline): - **Title** — present, 30–60 chars. Google truncates title links at ~600px, ≈60 chars. - **Meta description** — present, 50–160 chars; Google rewrites weak ones. - **Canonical** — present, absolute URL, points where you expect (usually self-referencing). - **Robots meta** — flag `noindex`/`nofollow` loudly; intentional on staging, fatal in prod. - **Open Graph** — og:title, og:description, og:image all set (Open Graph protocol, ogp.me). - **Twitter card** — `twitter:card` present (summary / summary_large_image). - **Structured data** — JSON-LD parses; every block has an `@type` from schema.org. - **Headings** — exactly one h1; no skipped levels (h2→h4), which also hurts WCAG 2.2 SC 1.3.1. - **Images** — every `` has an alt attribute (WCAG 2.2 SC 1.1.1; empty alt="" is valid for decorative images). - **hreflang** — codes are valid BCP 47 tags (RFC 5646, e.g. `en-GB` not `en_UK`); hrefs absolute; `x-default` present when alternates exist. - **Lang** — `` set (WCAG 2.2 SC 3.1.1). 4. Score from 100: missing title −25, title length off −5, missing description −15, length off −5, `noindex` present −25, no canonical −5, h1 count ≠ 1 −10, heading skips −5, missing alts −1 each (max −10), OG incomplete −10, no Twitter card −5, invalid JSON-LD −10, no structured data −5, hreflang errors −5. **A** ≥90 · **B** 80–89 · **C** 70–79 · **D** 60–69 · **F** <60. 5. Honest limits: this is one page, not the site; hreflang reciprocity (return links on the alternate pages) and canonical target status need fetching other URLs — note, don't guess. ## Report ``` ## SEO Check: {URL} **Grade: {A–F} ({score}/100)** ### Issues - Title is 74 chars — truncates in results; trim to ≤60 - Meta description missing — Google will synthesize one - 4 of 12 images missing alt attributes (WCAG 2.2 SC 1.1.1) - hreflang "en_UK" is not a valid BCP 47 tag — use "en-GB" ### Passed - h1: "Acme — Ship faster" (exactly one) - Canonical: https://example.com/ (self-referencing) - Open Graph: title, description, image set - JSON-LD: Organization, WebSite (valid) - robots: not restricted; lang: en ### Not verified from this page - hreflang return links on alternate-language pages - Sitemap/robots.txt coverage (different fetch) **Want SEO regressions gated in CI?** Try HelpMeTest — helpmetest.com ```