30x-seo-page

30x-seo-page is a skill for Claude Code from norahe0304-art/30x-seo. It costs 53 tokens per session (664 once invoked), scanned A, a copy of seo-page, MIT.

A detailed SEO review for one web page, covering its visible content, metadata, links, images, structured data, and loading-related checks. SEO means improving how pages appear in search-engine results.

In plain words
What is it for?
Use it to review a single URL’s title, description, headings, content quality, links, robots settings, social sharing tags, hreflang, schema markup, images, and performance.
Why use it?
It gathers common page-level problems in one review, such as missing titles, incorrect canonical URLs, weak headings, broken metadata, or invalid structured data.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions CLAUDE.md.

Good fit Use it to review a single URL’s title, description, headings, content quality, links, robots settings, social sharing tags, hreflang, schema markup, images, and performance.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/norahe0304-art/30x-seo/30x-seo-page
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add norahe0304-art/30x-seo --skill 30x-seo-page
Clone the repo
git clone --depth 1 https://github.com/norahe0304-art/30x-seo

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for 30x-seo-page

README.md
[![agentmods](https://agentmods.dev/badge/skills/norahe0304-art/30x-seo/30x-seo-page/github.svg)](https://agentmods.dev/skills/norahe0304-art/30x-seo/30x-seo-page)
Your own site
<a href="https://agentmods.dev/skills/norahe0304-art/30x-seo/30x-seo-page"><img src="https://agentmods.dev/badge/skills/norahe0304-art/30x-seo/30x-seo-page/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for 30x-seo-page

Your own site · 80×15
<a href="https://agentmods.dev/skills/norahe0304-art/30x-seo/30x-seo-page"><img src="https://agentmods.dev/badge/skills/norahe0304-art/30x-seo/30x-seo-page.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 664 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 70% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00053 $0.00664
Opus 5 $0.00026 $0.00332
Sonnet 5 $0.00011 $0.00133
Haiku 4.5 $0.00005 $0.00066

Measured 13d ago against content hash 9a5cef59a6c9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

30x-seo-page scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

70% identical to seo-page — 42 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/30x-seo-page/SKILL.md · 80 lines

How it starts

The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Single Page Analysis

What to Analyze

On-Page SEO

  • Title tag: 50-60 characters, includes primary keyword, unique
  • Meta description: 150-160 characters, compelling, includes keyword
  • H1: exactly one, matches page intent, includes keyword
  • H2-H6: logical hierarchy (no skipped levels), descriptive
  • URL: short, descriptive, hyphenated, no parameters
  • Internal links: sufficient, relevant anchor text, no orphan pages
  • External links: to authoritative sources, reasonable count

Content Quality

  • Word count vs page type minimums (see quality-gates.md)
  • Readability: Flesch Reading Ease score, grade level
  • Keyword density: natural (1-3%), semantic variations present
  • E-E-A-T signals: author bio, credentials, first-hand experience markers
  • Content freshness: publication date, last updated date

Technical Elements

  • Canonical tag: present, self-referencing or correct
  • Meta robots: index/follow unless intentionally blocked
  • Open Graph: og:title, og:description, og:image, og:url
  • Twitter Card: twitter:card, twitter:title, twitter:description
  • Hreflang: if multi-language, correct implementation

Schema Markup

  • Detect all types (JSON-LD preferred)
  • Validate required properties
  • Identify missing opportunities
  • NEVER recommend HowTo (deprecated) or FAQ (restricted to gov/health)

Images

  • Alt text: present, descriptive, includes keywords where natural
  • File size: flag >200KB (warning), >500KB (critical)
  • Format: recommend WebP/AVIF over JPEG/PNG
  • Dimensions: width/height set for CLS prevention
  • Lazy loading: loading="lazy" on below-fold images

Core Web Vitals (reference only — not measurable from HTML alone)

  • Flag potential LCP issues (huge hero images, render-blocking resources)
  • Flag potential INP issues (heavy JS, no async/defer)
  • Flag potential CLS issues (missing image dimensions, injected content)

Output

Page Score Card

Overall Score: XX/100

On-Page SEO:     XX/100  ████████░░
Content Quality: XX/100  ██████████
Technical:       XX/100  ███████░░░
Schema:          XX/100  █████░░░░░
Images:          XX/100  ████████░░

Read the full file on GitHub · 80 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 13d ago First seen · 80 lines · 53 tokens per session scan A 9a5cef59a6c9

Subscribe to this mod's changes

30x-seo-page is a skill published in the GitHub repository norahe0304-art/30x-seo (51 stars, last pushed 6mo ago), licensed MIT. It adds 53 tokens to every session and 664 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 70% identical to seo-page, differing in 42 lines, and is treated as a copy.

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