How to Use the Accessibility Prover MCP in Google ADK

Q: Is the Accessibility Prover compatible with my Google ADK setup?

Yes, you use the McpToolset class to register the server with your agent. It integrates directly into the Google ADK framework as a standard tool.

Q: How do I restrict Accessibility Prover tools in Google ADK?

You can use the toolnames filter when initializing the McpToolset to limit what the agent sees. This keeps your agent focused on specific accessibility audits.

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Connect Accessibility Prover MCP to Google ADK

Create your Vinkius account to connect Accessibility Prover to Google ADK 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 Google ADK

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Semantic HTML verification for Google ADK

The `validate_accessibility` tool scans your generated HTML to ensure you use proper semantic elements instead of unsemantic div wrappers. It forces the agent to map landmarks correctly. Your Google ADK agent will fail the build if it attempts to use a click handler on a non-interactive element. This keeps your interface compliant with modern screen readers.

Keyboard navigation gating for Google ADK

Every UI component built with Google ADK undergoes a tab order and focus check via `validate_accessibility`. The agent verifies that users can navigate your entire application without a mouse. If the agent generates a component that traps focus incorrectly, the tool triggers a failure. You fix the navigation logic before the code is finalized.

Motion and media query checks in Google ADK

The `validate_accessibility` tool audits your CSS for `prefers-reduced-motion` support. It ensures your transitions don't trigger vestibular issues for users with motion sensitivity. Your agent checks these constraints during every generation cycle. It refuses to output code that ignores user system preferences for reduced motion.

Setup guide

Set up Accessibility Prover MCP in Google ADK

Prerequisites

Python 3.10+ installed
google-adk package (pip install google-adk)
Active Vinkius subscription with a valid endpoint token

1

Install Google ADK

Run pip install google-adk to install the Agent Development Kit. MCP support is included via the McpToolset class.
2

Connect via SSE transport

Use McpToolset.from_server() with SseServerParams pointing to your Vinkius endpoint. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Create an LlmAgent

Pass the returned mcp_tools list directly to LlmAgent(tools=mcp_tools). The ADK maps each MCP tool to a native Gemini function call — no manual schema definitions required.
4

Run with any Gemini model

The agent works with any Gemini model (gemini-2.0-flash, gemini-2.5-pro, etc.). Copy the full example on the right to get started with Accessibility Prover tools in your ADK agent.

agent.py

from google.adk.agents import LlmAgent
from google.adk.tools.mcp_tool.mcp_toolset import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import SseServerParams

# Connect to the MCP via SSE
mcp_tools, exit_stack = await McpToolset.from_server(
    connection_params=SseServerParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    )
)

# Create your agent with auto-discovered tools
agent = LlmAgent(
    name="Accessibility Prover_agent",
    model="gemini-2.0-flash",
    instruction="You have access to Accessibility Prover tools via MCP.",
    tools=mcp_tools,
)

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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 Google ADK

Yes, you use the `McpToolset` class to register the server with your agent. It integrates directly into the Google ADK framework as a standard tool.

It excels here because it forces the agent to evaluate accessibility constraints across large, complex component trees. The tool ensures your long-context reasoning respects WCAG standards.

You can use the tool_names filter when initializing the `McpToolset` to limit what the agent sees. This keeps your agent focused on specific accessibility audits.

The server supports Stdio and HTTP, allowing you to run it within your secure infrastructure. Your traffic stays local to your Google Cloud environment.

No, the server acts as an ephemeral validator for your markup. It performs the check in memory and keeps no logs of your component source code.

Use it with your favorite AI tools

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