seo-audit

seo-audit is a skill for Claude Code, Codex from Kevin-Liu-01/Agent-Machines. It costs 85 tokens per session (1,946 once invoked), scanned A, original, MIT.

A structured review of a website's search-engine health, covering whether pages can be found, indexed, loaded quickly, and understood. It also examines page content, quality, and links.

In plain words
What is it for?
Use it to audit crawlability, indexation, metadata, page speed, on-page content, structured data, and site authority.
Why use it?
It reveals the technical and content problems that can keep a site from appearing in search results. Findings are organised into prioritised actions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to audit crawlability, indexation, metadata, page speed, on-page content, structured data, and site authority.

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Install with agentmods
npx agentmods add skills/kevin-liu-01/agent-machines/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 Kevin-Liu-01/Agent-Machines --skill seo-audit
Clone the repo
git clone --depth 1 https://github.com/Kevin-Liu-01/Agent-Machines

Made for: Claude Code, Codex.

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/kevin-liu-01/agent-machines/seo-audit/github.svg)](https://agentmods.dev/skills/kevin-liu-01/agent-machines/seo-audit)
Your own site
<a href="https://agentmods.dev/skills/kevin-liu-01/agent-machines/seo-audit"><img src="https://agentmods.dev/badge/skills/kevin-liu-01/agent-machines/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/kevin-liu-01/agent-machines/seo-audit"><img src="https://agentmods.dev/badge/skills/kevin-liu-01/agent-machines/seo-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 85 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,946 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found 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 $0.00085 $0.01946
Opus 5 $0.00043 $0.00973
Sonnet 5 $0.00017 $0.00389
Haiku 4.5 $0.00009 $0.00195

Measured 9d ago against content hash 01c0627e64b0, 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 9d 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. Many CMS plugins inject JSON-LD via client-side JavaScript — it won't appear in static HTML.
knowledge/skills/seo-audit/SKILL.md · 200 lines

How it starts

The opening of the file, as written. The whole thing — 200 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SEO Audit

Systematic assessment across five priority areas. Deliver findings as prioritized action plans with impact levels and specific remediation steps.

Audit Priority Order

  1. Crawlability & Indexation — can search engines 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?

Initial Assessment

Before auditing, understand:

  • Site type (SaaS, e-commerce, blog, etc.) and primary business goal for SEO
  • Known issues, current organic traffic level, recent changes or migrations
  • Scope: full site or specific pages, technical + on-page or one focus area

Schema Markup Detection Limitation

web_fetch and curl cannot reliably detect structured data. Many CMS plugins inject JSON-LD via client-side JavaScript — it won't appear in static HTML.

To accurately check for schema:

  1. Browser tool: document.querySelectorAll('script[type="application/ld+json"]')
  2. Google Rich Results Test: https://search.google.com/test/rich-results
  3. Screaming Frog export (renders JavaScript)

Never report "no schema found" based solely on web_fetch or curl.

1. Crawlability & Indexation

Robots.txt

  • Check for unintentional blocks, verify important pages allowed, check sitemap reference
  • Verify AI bot access: Googlebot, Bingbot, GPTBot, ChatGPT-User, ClaudeBot, PerplexityBot

XML Sitemap

  • Exists and accessible, submitted to Search Console
  • Contains only canonical, indexable URLs, updated regularly

Site Architecture

  • Important pages within 3 clicks of homepage
  • Logical hierarchy, descriptive internal linking, no orphan pages

Indexation

  • site:domain.com check, Search Console coverage report
  • Check for noindex on important pages, wrong canonicals, redirect chains, soft 404s, duplicate content

Canonicalization

  • All pages have canonical tags, self-referencing canonicals on unique pages
  • HTTP→HTTPS, www vs non-www, trailing slash consistency

Read the full file on GitHub · 200 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. 9d ago First seen · 200 lines · 85 tokens per session scan A 01c0627e64b0

Subscribe to this mod's changes

seo-audit is a skill published in the GitHub repository Kevin-Liu-01/Agent-Machines (29 stars, last pushed today), licensed MIT. It adds 85 tokens to every session and 1,946 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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