UBOS Asset Marketplace: A11y MCP Server for Web Accessibility Testing

In today’s digital landscape, ensuring web accessibility isn’t just a best practice; it’s a necessity. As businesses strive to reach wider audiences and comply with evolving regulations, the demand for robust and reliable web accessibility testing tools is greater than ever. That’s why UBOS is proud to feature the A11y MCP Server on its Asset Marketplace, a powerful solution designed to empower AI Agents with web accessibility insights, specifically tailored for MCP (Model Context Protocol) servers. With over 900 downloads, this server has already proven its value in the community, offering a comprehensive suite of features for identifying and addressing accessibility issues.

What is the A11y MCP Server?

The A11y MCP Server is an MCP (Model Context Protocol) server that gives LLMs access to web accessibility testing APIs. It acts as a bridge, allowing AI models to access and interact with external data sources and tools related to web accessibility. This server uses the Deque Axe-core API and Puppeteer to allow LLMs to analyze web content for WCAG compliance and identify accessibility issues.

Key Features:

• WCAG Compliance Testing: Check content against various WCAG standards (2.0, 2.1, 2.2).
• Customizable Tests: Specify which accessibility tags/standards to test against.
• Rule Exploration: Get information about available accessibility rules.
• Color Contrast Analysis: Check color combinations for WCAG compliance.
• ARIA Validation: Test proper usage of ARIA attributes.
• Orientation Lock Detection: Identify content that forces specific screen orientations

Use Cases: Unleashing the Power of AI in Web Accessibility

The A11y MCP Server opens up a wide array of use cases, allowing developers, QA teams, and accessibility experts to leverage the power of AI to enhance their web accessibility efforts. Here are some key scenarios where this server can make a significant impact:

1. Automated Accessibility Audits: Integrate the A11y MCP Server into your CI/CD pipeline to automatically scan web pages for accessibility issues with every build. This proactive approach helps catch potential problems early in the development lifecycle, reducing remediation costs and ensuring consistent compliance.
2. AI-Powered Remediation Suggestions: Use the server’s output to train AI models that can suggest code fixes and content adjustments to address identified accessibility violations. This can significantly speed up the remediation process and empower developers to create more accessible websites.
3. Real-Time Accessibility Monitoring: Continuously monitor your website for accessibility regressions by scheduling regular scans using the A11y MCP Server. Receive alerts when new issues are detected, allowing you to address them promptly and maintain a high level of accessibility.
4. Accessibility Training and Education: Use the server as a learning tool to educate developers and content creators about web accessibility best practices. By providing concrete examples of accessibility violations and their impact, you can foster a culture of accessibility within your organization.
5. Enhanced User Experience: Provide end-users with personalized accessibility recommendations based on their individual needs and preferences. By analyzing user behavior and preferences, you can tailor the website experience to ensure optimal accessibility for everyone.

Diving Deeper: Features and Functionality

The A11y MCP Server boasts a comprehensive set of tools designed to streamline your web accessibility testing workflow. Let’s take a closer look at some of its key features:

• Test Web Pages: This feature allows you to test any public URL for accessibility issues. Simply provide the URL, and the server will analyze the page and return a detailed report of any violations.
• Test HTML Snippets: In addition to testing entire web pages, the server can also analyze individual HTML snippets. This is particularly useful for testing dynamic content or components that are generated on the fly.
• WCAG Compliance Testing: The server supports a wide range of WCAG standards, including 2.0, 2.1, and 2.2. This allows you to test your website against the specific guidelines that are relevant to your target audience and industry.
• Customizable Tests: You can customize the tests by specifying which accessibility tags and standards to test against. This allows you to focus on the specific areas of accessibility that are most important to your organization.
• Rule Exploration: The server provides access to a wealth of information about available accessibility rules. This allows you to understand the rationale behind each rule and how it contributes to overall accessibility.
• Color Contrast Analysis: The server includes a dedicated tool for checking color combinations for WCAG compliance. This ensures that your website’s colors provide sufficient contrast for users with visual impairments.
• ARIA Validation: The server validates the proper usage of ARIA attributes, which are essential for making dynamic content accessible to screen readers and other assistive technologies.
• Orientation Lock Detection: The server can identify content that forces specific screen orientations, which can be problematic for users with disabilities.

Getting Started: Installation and Configuration

Integrating the A11y MCP Server into your workflow is a straightforward process. The installation instructions are clear and concise, and the server is designed to be easy to configure. You can configure it in the MCP settings for Claude Desktop

Configuration Steps:

1. Locate the Configuration File: The location of the configuration file depends on your operating system.
   • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
   • Windows: %APPDATA%Claudesettingsclaude_mcp_settings.json
   • Linux: ~/.config/Claude/settings/claude_mcp_settings.json
2. Edit the Configuration File: Open the configuration file in a text editor and add the following code snippet:

{ “mcpServers”: { “a11y-accessibility”: { “command”: “npx”, “args”: [ “-y”, “a11y-mcp-server” ] } } }

UBOS: Your Partner in AI Agent Development

UBOS is a full-stack AI Agent Development Platform focused on bringing AI Agents to every business department. Our platform helps you orchestrate AI Agents, connect them with your enterprise data, build custom AI Agents with your LLM model, and create Multi-Agent Systems.

The UBOS Asset Marketplace is a curated collection of pre-built AI components and tools that can be easily integrated into your AI Agent workflows. By leveraging the assets available on the marketplace, you can accelerate your development process and focus on building innovative AI solutions.

Conclusion: Empowering Accessible Digital Experiences

The A11y MCP Server is a valuable asset for any organization that is committed to creating accessible digital experiences. By providing a comprehensive suite of tools for identifying and addressing accessibility issues, this server empowers developers, QA teams, and accessibility experts to build websites and applications that are inclusive and accessible to everyone.

With the UBOS Asset Marketplace, you can easily access and integrate the A11y MCP Server into your AI Agent workflows. Start building more accessible digital experiences today!