Accessibility AI MCP Server

By MEOK AI Labs — Web accessibility (a11y) checking tools for WCAG 2.1 compliance

Installation

pip install accessibility-ai-mcp

Usage

# Run standalone
python server.py

# Or via MCP
mcp install accessibility-ai-mcp

Tools

check_color_contrast

Check WCAG 2.1 color contrast ratio between foreground and background colors. Returns AA/AAA pass/fail for normal and large text.

Parameters:

• foreground (str): Foreground/text color in hex (e.g., '#333333')
• background (str): Background color in hex (e.g., '#FFFFFF')
• font_size (float): Font size in pixels (default 16)
• bold (bool): Whether text is bold (default False)

suggest_alt_text

Suggest alt text guidelines and templates for different image types per WCAG 2.1 - 1.1.1 Non-text Content.

Parameters:

• context (str): Description of the image content/context
• image_type (str): Image type — 'photo', 'icon', 'chart', 'decorative', 'logo', 'screenshot', 'diagram'

check_heading_hierarchy

Check heading hierarchy in HTML for proper nesting (h1 -> h2 -> h3...) per WCAG 1.3.1.

Parameters:

• html (str): HTML content to analyze

aria_validator

Validate ARIA attributes and roles in HTML for correctness. Checks for invalid roles, missing role attributes, and focusable elements with aria-hidden.

Parameters:

• html (str): HTML content to validate

Authentication

Free tier: 50 calls/day. Upgrade at meok.ai/pricing for unlimited access.

License

MIT — MEOK AI Labs