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.
npx skills add lionkiii/claude-seo-skills --skill seo-page-experiencegit clone --depth 1 https://github.com/lionkiii/claude-seo-skillsWrote 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.
[](https://agentmods.dev/skills/lionkiii/claude-seo-skills/seo-page-experience)<a href="https://agentmods.dev/skills/lionkiii/claude-seo-skills/seo-page-experience"><img src="https://agentmods.dev/badge/skills/lionkiii/claude-seo-skills/seo-page-experience/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.
<a href="https://agentmods.dev/skills/lionkiii/claude-seo-skills/seo-page-experience"><img src="https://agentmods.dev/badge/skills/lionkiii/claude-seo-skills/seo-page-experience.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00069 | $0.01892 |
| Opus 5 | $0.00034 | $0.00946 |
| Sonnet 5 | $0.00014 | $0.00378 |
| Haiku 4.5 | $0.00007 | $0.00189 |
Grade A, and why
seo-page-experience 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 12d 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.
curl -sI -L -w 'final_url=%{url_effective} http=%{http_code}\n' http://<host><path> How it starts
The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Page Experience Self-Assessment
Google retired the standalone "page experience ranking signal" framing. Per https://developers.google.com/search/docs/appearance/page-experience there is no single page experience signal — Google's core ranking systems look at a variety of signals that align with overall page experience. Of these, Core Web Vitals are used by ranking systems; other aspects (HTTPS, interstitials, mobile usability) don't directly boost rankings but make the site more satisfying to use, which aligns with what ranking systems reward. Evaluation is generally page-specific, with some site-wide assessments.
This skill runs Google's own self-assessment question list against a URL.
Google's Self-Assessment Questions
| # | Question | How this skill checks it |
|---|---|---|
| 1 | Do your pages have good Core Web Vitals? | Delegate to seo-core-web-vitals skill (field data at p75) |
| 2 | Are your pages served in a secure fashion? | HTTPS, redirect, certificate, mixed content |
| 3 | Does your content display well on mobile devices? | Viewport meta, responsive markup, font size, tap targets |
| 4 | Does your content avoid excessive ads that distract from or interfere with the main content? | Ad density heuristics on HTML (manual confirmation advised) |
| 5 | Do your pages avoid using intrusive interstitials? | Interstitial heuristics on initial HTML |
| 6 | Can visitors easily distinguish the main content from other content? | Above-fold content prominence, labeled ads |
Inputs
| Input | Required | Notes |
|---|---|---|
| URL | Yes | Single page; page experience is evaluated per page |
| Mobile or desktop focus | No | Default mobile — interstitial rules target mobile entry from search |
Execution
- Fetch the page and check HTTPS:
curl -sI -L -w 'final_url=%{url_effective} http=%{http_code}\n' http://<host><path> curl -s -o /dev/null -w '%{http_code}' https://<url>http://must 301-redirect tohttps://(single hop ideal).- Certificate valid (
curl -vshows no TLS errors). - Scan HTML for mixed content:
http://URLs insrc=,hrefof stylesheets,srcset.
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.
- 12d ago First seen · 158 lines · 69 tokens per session scan A 01811700512e
seo-page-experience is a skill published in the GitHub repository lionkiii/claude-seo-skills (20 stars, last pushed 3mo ago), licensed MIT. It adds 69 tokens to every session and 1,892 once invoked, about $0.0003 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 2026-08-30.
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