Evaluates UI elements for accessibility issues that automated scanners miss.
COST: $0.01 USDC via x402 on Base-compatible EVM network per call.
Checks beyond what axe/Lighthouse/WAVE catch at the design stage:
- Touch targets below 24×24px (WCAG 2.5.8 AA hard fail)
- Touch targets below 44×44px (WCAG 2.5.5 AAA recommended)
- Information conveyed by color alone without a secondary indicator (WCAG 1.4.1)
- Missing focus indicators on interactive elements (WCAG 2.4.7)
- Focus rings thinner than 2px (WCAG 2.4.11)
- Focus ring contrast below 3:1 against adjacent background (WCAG 2.4.11)
- Interactive elements below the practical usability height floor
Args:
- elements: Array of 1–50 UI element objects
- screen_name: Optional label for the evaluation report
Each element requires: element_type.
Provide width_px/height_px for touch target checks.
Provide uses_color_only + secondary indicator flags for 1.4.1 checks.
Provide is_interactive + focus_visible + focus indicator properties for focus checks.
Returns: Structured report with:
- Per-element scores (0–100) and specific issues
- Severity levels (critical/major/minor) with WCAG references
- What automated tools miss and why
- Concrete fix recommendations
- Overall score and verdict (pass/needs_work/fail)
- Top issues sorted by severity
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