UXLens

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

Security Scan

The skill's runtime instructions and required API key align with a website-audit capability, but the registry metadata omits the declared UXLENS_API_KEY and source/homepage information — verify before installing.

Purpose & Capability

The SKILL.md describes a UX/UI/a11y auditing API (POSTs to https://uxlens.io/api/audit, returns structured JSON and Core Web Vitals), which matches the skill name and description. However, the registry metadata at the top of the package claims no required env vars and no homepage/source while SKILL.md requires UXLENS_API_KEY and provides a homepage and GitHub source. This is an inconsistency in metadata (likely an omission) that should be clarified.

Instruction Scope

SKILL.md instructs setting a single API key and shows example POST requests to uxlens.io. It does not tell the agent to read arbitrary local files, other environment variables, or to exfiltrate data to unexpected endpoints. The claim that 'API keys are never stored by the skill' is an assertion only — there is no code to verify behavior.

Install Mechanism

This is an instruction-only skill with no install spec and no code files, so nothing is written to disk by an installer. That minimizes install-time risk.

Credentials

The only runtime secret declared in SKILL.md is UXLENS_API_KEY, which is proportionate for calling a third-party audit API. The registry metadata not listing this required env var is a mismatch and should be corrected so users know they must provide the key.

Persistence & Privilege

The skill has default privileges (not always: true), is user-invocable, and can be invoked autonomously (platform default). It does not request persistent system-level presence or access to other skills' configs.

Assessment

The skill appears to do what it claims (calls uxlens.io with a single API key). Before installing: (1) confirm the missing registry metadata — SKILL.md requires UXLENS_API_KEY but the package metadata lists none; ask the publisher to correct this, (2) verify the homepage (https://uxlens.io) and the GitHub source linked in SKILL.md to ensure the service and repo are legitimate, (3) only provide an API key with appropriate scope/limits and use a key you can revoke if needed, (4) test on non-sensitive sites first, and (5) remember that because this is instruction-only there is no code to audit in the package — review the external repo and service privacy/storage practices if you need stronger assurance.

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