seo-audit

seo-audit is a skill for Claude Code from ukunal91app/Marketing-Skills-by-Corey-Haines. It costs 172 tokens per session (2,496 once invoked), scanned A, a copy of seo-audit, MIT.

A set of checks for a website’s search-engine visibility. Search engine optimization, or SEO, is the work of helping pages appear clearly and prominently in search results.

In plain words
What is it for?
Use it to review a whole website or selected pages, investigate ranking or traffic drops, and get recommendations for improving technical and on-page SEO. It can also use available product, analytics, and Search Console context.
Why use it?
It helps uncover problems with page content, technical setup, search terms, and site context that may prevent people from finding the site through search.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the marketing-skills plugin — 35 skills shipped together

Good fit Use it to review a whole website or selected pages, investigate ranking or traffic drops, and get recommendations for improving technical and on-page SEO. It can also use available product, analytics, and Search Console context.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ukunal91app/marketing-skills-by-corey-haines/seo-audit
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 ukunal91app/Marketing-Skills-by-Corey-Haines --skill seo-audit
Clone the repo
git clone --depth 1 https://github.com/ukunal91app/Marketing-Skills-by-Corey-Haines

Made for: Claude Code.

Or install marketing-skills, the plugin that ships this one along with the rest of its 35 skills.

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 seo-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/ukunal91app/marketing-skills-by-corey-haines/seo-audit/github.svg)](https://agentmods.dev/skills/ukunal91app/marketing-skills-by-corey-haines/seo-audit)
Your own site
<a href="https://agentmods.dev/skills/ukunal91app/marketing-skills-by-corey-haines/seo-audit"><img src="https://agentmods.dev/badge/skills/ukunal91app/marketing-skills-by-corey-haines/seo-audit/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 seo-audit

Your own site · 80×15
<a href="https://agentmods.dev/skills/ukunal91app/marketing-skills-by-corey-haines/seo-audit"><img src="https://agentmods.dev/badge/skills/ukunal91app/marketing-skills-by-corey-haines/seo-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 172 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,496 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin 84% 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 $0.00172 $0.02496
Opus 5 $0.00086 $0.01248
Sonnet 5 $0.00034 $0.00499
Haiku 4.5 $0.00017 $0.00250

Measured 13d ago against content hash a6e064274364, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

seo-audit scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

**`web_fetch` and `curl` cannot reliably detect structured data / schema markup.**
Origin

This is a copy

84% identical to seo-audit — 30 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/seo-audit/SKILL.md · 413 lines

How it starts

The opening of the file, as written. The whole thing — 413 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SEO Audit

You are an expert in search engine optimization. Your goal is to identify SEO issues and provide actionable recommendations to improve organic search performance.

Initial Assessment

Check for product marketing context first: If .agents/product-marketing-context.md exists (or .claude/product-marketing-context.md in older setups), read it before asking questions. Use that context and only ask for information not already covered or specific to this task.

Before auditing, understand:

  1. Site Context

    • What type of site? (SaaS, e-commerce, blog, etc.)
    • What's the primary business goal for SEO?
    • What keywords/topics are priorities?
  2. Current State

    • Any known issues or concerns?
    • Current organic traffic level?
    • Recent changes or migrations?
  3. Scope

    • Full site audit or specific pages?
    • Technical + on-page, or one focus area?
    • Access to Search Console / analytics?

Audit Framework

Schema Markup Detection Limitation

web_fetch and curl cannot reliably detect structured data / schema markup.

Many CMS plugins (AIOSEO, Yoast, RankMath) inject JSON-LD via client-side JavaScript — it won't appear in static HTML or web_fetch output (which strips <script> tags during conversion).

To accurately check for schema markup, use one of these methods:

  1. Browser tool — render the page and run: document.querySelectorAll('script[type="application/ld+json"]')
  2. Google Rich Results Testhttps://search.google.com/test/rich-results
  3. Screaming Frog export — if the client provides one, use it (SF renders JavaScript)

Reporting "no schema found" based solely on web_fetch or curl leads to false audit findings — these tools can't see JS-injected schema.

Priority Order

  1. Crawlability & Indexation (can Google find and index it?)
  2. Technical Foundations (is the site fast and functional?)
  3. On-Page Optimization (is content optimized?)
  4. Content Quality (does it deserve to rank?)
  5. Authority & Links (does it have credibility?)

Read the full file on GitHub · 413 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 413 lines · 172 tokens per session scan A a6e064274364

Subscribe to this mod's changes

seo-audit is a skill published in the GitHub repository ukunal91app/Marketing-Skills-by-Corey-Haines (23 stars, last pushed 5mo ago), licensed MIT. It adds 172 tokens to every session and 2,496 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 84% identical to seo-audit, differing in 30 lines, and is treated as a copy.

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