How to Use the Accessibility Prover MCP in Claude Code

Q: How do I add this MCP Server to my Claude Code setup?

Run claude mcp add --transport http accessibility-prover -- in your terminal. Replace with the server endpoint from Vinkius. Your configuration is saved in /.claude.json.

Pipe UI specs into Claude Code. Get back a WCAG 2.2 AA validation report. Perfect for CI/CD checks.

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Connect Accessibility Prover MCP to Claude Code

Create your Vinkius account to connect Accessibility Prover to Claude Code and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Accessibility Prover with Claude Code

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Automate Accessibility Audits in Your CI Pipeline

The `validate_accessibility` tool gives your build scripts a pass/fail accessibility gate. Before merging a new component, your CI job can use Claude Code to send the component's design spec to this tool. It checks for semantic HTML, keyboard navigation paths, and proper ARIA labeling. A failed check returns a non-zero exit code, breaking the build. The output will tell you exactly what's wrong—a missing modal focus trap, a color contrast ratio below 4.5:1, or undefined motion overrides. It turns accessibility compliance into a testable artifact.

A Headless Accessibility Gate for Claude Code

This isn't a GUI tool. It's a sharp, single-purpose utility for your terminal and scripts. Use Claude Code to pipe a JSON or YAML file defining a UI component into `validate_accessibility`. Get a clear, machine-readable response. It’s designed for automation. You can write a simple shell script that generates a UI spec, validates it with this MCP server, and only proceeds if the check passes. This is how you enforce standards across a team without manual reviews.

Enforce Compliance as Code

Treat accessibility rules as part of your codebase. With this tool, your agent's proposals for UI structure are data that can be validated. It forces any automated process to account for WCAG 2.2 AA and EAA 2025 requirements from the start. By integrating this MCP Server with Claude Code, you create a system where inaccessible designs are rejected automatically. No more deploying components with obvious focus or screen reader issues. It's a simple, effective check for any backend or DevOps workflow.

Setup guide

Set up Accessibility Prover MCP in Claude Code

Prerequisites

Claude Code CLI installed (npm install -g @anthropic-ai/claude-code)
Active Vinkius subscription with a valid endpoint token

1

Run the add command

Open your terminal and run the command shown on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com. Use --scope user to make it available across all projects.
2

Verify the connection

Start a Claude Code session and type /mcp to list connected servers. You should see accessibility-prover-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest Accessibility Prover transactions." It will automatically discover and invoke the available Accessibility Prover tools.

Terminal

claude mcp add --transport http accessibility-prover-mcp https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

Get your connection token →

Prerequisites

Claude Code CLI installed
Active Vinkius subscription with a valid endpoint token

1

Open the config file

Create or edit .mcp.json in your project root for project-level scope, or ~/.claude.json for user-level scope.
2

Add the Accessibility Prover MCP

Paste the JSON snippet shown on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Code

Start a new Claude Code session. Type /mcp to confirm the server is connected. The tools will be automatically available in your conversation.

.mcp.json

{
  "mcpServers": {
    "accessibility-prover-mcp": {
      "type": "url",
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Accessibility Prover. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Accessibility Prover MCP in Claude Code

In your workflow YAML, install Claude Code, add the MCP Server with `claude mcp add`, and then run a script that calls the `validate_accessibility` tool. You can have it read a component spec from a file and fail the job if the validation doesn't pass.

It expects a structured description of the UI component. This includes the intended HTML elements, keyboard interaction logic, color values, and any ARIA attributes. You'll typically provide this as a JSON object to Claude Code.

Yes. When a validation fails, the tool returns a descriptive error message. Since you're using Claude Code in the terminal, you can pipe this stderr output to a log file or display it directly in your CI job's console.

Run `claude mcp add --transport http accessibility-prover -- ` in your terminal. Replace `` with the server endpoint from Vinkius. Your configuration is saved in `~/.claude.json`.

Only the UI component specification data is sent for processing. This data is handled in an ephemeral V8 isolate on Vinkius, meaning the environment is destroyed after your request. Nothing is stored, and your intellectual property remains yours.

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