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

bash

export UXLENS_API_KEY=your_key_here

Pricing#

TierPriceWhat you getFree$0/mo5 audits/monthDeveloper$9.99/mo500 audits/monthPro$29/mo3,000 audits/month

API Examples#

Single URL Audit#

text

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

Full Site Crawl#

text

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

Diff Mode (before/after redesign)#

text

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

Response Fields#

FieldDescriptionoverall0-5 score with status labelagent_summaryOne-paragraph summary — safe to read aloudaudit_idUse with compare_to for diff modeuxIssuesUsability heuristic violationsuiIssuesSpacing, typography, alignment issuesa11yIssuesWCAG accessibility violationslighthousePerformance, Accessibility, Best Practices, SEO (0-100)coreWebVitalsLCP, CLS, FCP, INP with pass/failmobileResponsiveViewport, touch targets, font sizesmetaCompletenessOG 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