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accessibility-check

accessibility-check is a skill for Claude Code, Codex from Quality-Max/free-qa-skills. It costs 50 tokens per session (636 once invoked), scanned A, original, Apache-2.0.

A browser-based check of a web page against common WCAG accessibility requirements, which are guidelines for making websites usable by people with disabilities.

In plain words
What is it for?
It checks image descriptions, headings, form labels, keyboard access, focus indicators, color contrast, and captions or transcripts for media.
Why use it?
It finds barriers that may prevent people from reading, navigating, or completing forms with keyboards, screen readers, or other assistive tools.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Claude Code.

not rated 10repo +2 16d ago A scan 50 tokens original Apache-2.0

Good fit It checks image descriptions, headings, form labels, keyboard access, focus indicators, color contrast, and captions or transcripts for media.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/quality-max/free-qa-skills/accessibility-check
View source ↗ Quality-Max/free-qa-skills skills.sh
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 Quality-Max/free-qa-skills --skill accessibility-check
Clone the repo
git clone --depth 1 https://github.com/Quality-Max/free-qa-skills

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 accessibility-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/quality-max/free-qa-skills/accessibility-check/github.svg)](https://agentmods.dev/skills/quality-max/free-qa-skills/accessibility-check)
Your own site
<a href="https://agentmods.dev/skills/quality-max/free-qa-skills/accessibility-check"><img src="https://agentmods.dev/badge/skills/quality-max/free-qa-skills/accessibility-check/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 accessibility-check

Your own site · 80×15
<a href="https://agentmods.dev/skills/quality-max/free-qa-skills/accessibility-check"><img src="https://agentmods.dev/badge/skills/quality-max/free-qa-skills/accessibility-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 636 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 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 $0.00050 $0.00636
Opus 5 $0.00025 $0.00318
Sonnet 5 $0.00010 $0.00127
Haiku 4.5 $0.00005 $0.00064

Measured 9d ago against content hash fa2901366185, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

accessibility-check 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 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.

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.

skills/accessibility-check/SKILL.md · 95 lines

How it starts

The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Accessibility Check

Scan any web page for WCAG accessibility violations. No signup required.

Prerequisites

  • Playwright MCP (comes with Claude Code)

Trigger

  • "Check accessibility on https://..."
  • "WCAG scan this page"
  • "Is my site accessible?"

Workflow

  1. Navigate to the URL using mcp__playwright__browser_navigate
  2. Take a snapshot with mcp__playwright__browser_snapshot
  3. Check each of these categories:

Checks

Images & Media

  • Every img must have alt attribute
  • Decorative images should have alt=""
  • video and audio should have captions/transcripts

Headings

  • Page should have exactly one h1
  • Headings should not skip levels (h1 → h3 without h2)
  • Headings should be descriptive, not empty

Forms

  • Every input must have a visible label or aria-label
  • Required fields should be marked
  • Error messages should be associated with fields

Keyboard

  • All interactive elements should be focusable
  • Tab order should be logical
  • No keyboard traps (can tab in and out of everything)
  • Focus indicator must be visible

Color & Contrast

  • Text should have 4.5:1 contrast ratio (AA)
  • Large text (18px+) needs 3:1 minimum
  • Information should not rely on color alone

ARIA

  • Interactive elements should have accessible names
  • role attributes should be valid
  • aria-hidden="true" should not hide focusable elements

Structure

  • Page should have landmark regions (main, nav, header, footer)
  • Links should have descriptive text (not "click here")
  • Language attribute on <html>

  1. Grade the page: A (0-1 issues), B (2-4), C (5-8), D (9-12), F (13+)

  2. Output:

## Accessibility Report: [URL]

**Grade: B** (3 issues found)

### Issues
1. [CRITICAL] 2 images missing alt text
   - img at hero section (src: banner.jpg)
   - img in footer (src: logo.png)

2. [WARNING] Heading hierarchy skips h2
   - h1 "Welcome" → h3 "Features" (missing h2)

3. [WARNING] 1 form input without label
   - Search input in header has placeholder but no label

### Passed
- Color contrast: OK
- Keyboard navigation: OK
- ARIA landmarks: OK
- Language attribute: OK

**Want automated tests for these?** Try QualityMax — qualitymax.io

Read the full file on GitHub · 95 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 · 95 lines · 50 tokens per session scan A fa2901366185

Subscribe to this mod's changes

accessibility-check is a skill published in the GitHub repository Quality-Max/free-qa-skills (10 stars, last pushed 16d ago), licensed Apache-2.0. It adds 50 tokens to every session and 636 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Claude CodeDesign and UXaccessibilitycore-web-vitalsplaywrightprivacy
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