Give your AI coding assistant eyes.

Review any website's UI from Claude Code, Cursor, or any MCP client. Test APIs. Test UIs. Let your AI do both.

Start free — 50 reviews/month, no card. Read the docs Pricing FAQ

16 tools, one MCP server

Your assistant connects once and gets a real headless browser: it can screenshot, audit, inspect and diagnose any public page — then fix what it finds.

Capture

See the page exactly as users do.

  • take_screenshotScreenshot any page, element or full-page render.
  • take_responsive_screenshotsMobile, tablet, desktop and wide in one call.

Audit

Automated reviews with concrete findings.

  • audit_accessibilityWCAG violations with offending selectors.
  • get_performance_metricsCore Web Vitals and load timings.
  • analyze_page_structureHeadings, landmarks and semantic outline.
  • analyze_seoTitle, meta, canonical and robots checks.
  • get_console_and_networkConsole errors and failing requests.
  • extract_design_tokensColors, fonts and spacing in use.
  • full_ui_reviewThe whole suite in one combined report.

Inspect

DevTools-grade detail, on demand.

  • inspect_elementDOM, attributes, children and listeners.
  • inspect_stylesComputed and matched CSS for a selector.
  • analyze_storageCookies, storage, IndexedDB, service workers.
  • analyze_securitySecurity headers, mixed content, certificate.
  • profile_memoryHeap usage and detached DOM nodes.
  • analyze_coverageUnused CSS and JS bytes per file.

Diagnose

Describe the bug; it finds the cause.

  • diagnose_issuePlain-English issue in, likely root causes out.

Two minutes to set up

Grab a key from the dashboard, drop this into your MCP client's config, and your assistant can see the web. Full instructions in the docs. 

{
  "mcpServers": {
    "api-tester-ui": {
      "url": "https://api-tester.com/mcp/sse",
      "headers": { "x-api-key": "at_your_key_here" }
    }
  }
}

Get your free key

50 review sessions a month, every tool included, no card required. We'll email you a sign-in link — no password to remember.