UXLens

Audit websites for UX, UI, and accessibility issues with 600+ checkpoints, offering detailed reports, full site crawls, and redesign comparisons.

UXLens — UX Audit Skill for AI Agents

Audit any website for UX, UI, and accessibility issues in seconds. Get a structured report with specific issues, severity levels, and prioritized fixes — delivered as an agent_summary the agent can read and act on directly.

Install once. Use in every project.

What This Skill Does

• Runs 600+ UX, UI, and accessibility checkpoints against any URL
• Delivers structured JSON output with agent_summary — a paragraph the agent can read and act on
• Crawls entire sites automatically via sitemap discovery
• Compares before/after redesigns with diff mode
• Returns Core Web Vitals (LCP, CLS, FCP, INP) with pass/fail status
• Checks WCAG accessibility compliance with specific violation locations

Setup

1. Get a free API key at https://uxlens.io/dashboard (no credit card required)
2. Set UXLENS_API_KEY environment variable with your key

export UXLENS_API_KEY=your_key_here

Pricing

Tier	Price	What you get
Free	$0/mo	5 audits/month
Developer	$9.99/mo	500 audits/month
Pro	$29/mo	3,000 audits/month

API Examples

Single URL Audit

POST https://uxlens.io/api/audit
{ "url": "https://example.com" }

Full Site Crawl

POST https://uxlens.io/api/audit
{ "url": "https://example.com", "crawl_all": true }

Diff Mode (before/after redesign)

POST https://uxlens.io/api/audit
{ "url": "https://example.com", "compare_to": "uxl_a1b2c3d4" }

Response Fields

Field	Description
overall	0-5 score with status label
agent_summary	One-paragraph summary — safe to read aloud
audit_id	Use with compare_to for diff mode
uxIssues	Usability heuristic violations
uiIssues	Spacing, typography, alignment issues
a11yIssues	WCAG accessibility violations
lighthouse	Performance, Accessibility, Best Practices, SEO (0-100)
coreWebVitals	LCP, CLS, FCP, INP with pass/fail
mobileResponsive	Viewport, touch targets, font sizes
metaCompleteness	OG tags, Twitter cards, canonical, favicon

Who Uses This

• Freelance developers auditing client sites before handoff
• Indie hackers checking landing pages before launch
• AI agents building websites and validating quality automatically
• Small agencies running quick UX audits

Security & Privacy

• API keys are never stored by the skill
• All audit data is processed transiently
• MIT-0 license
• Homepage: https://uxlens.io