How to Use the Color Contrast Checker MCP in OpenAI Agents SDK

Get automated, WCAG-compliant color validation in your production OpenAI Agents SDK pipelines.

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Connect Color Contrast Checker MCP to OpenAI Agents SDK

Create your Vinkius account to connect Color Contrast Checker to OpenAI Agents SDK 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 Color Contrast Checker with OpenAI Agents SDK

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Claude

Perplexity

Automate WCAG audits in OpenAI Agents SDK

`check_color_contrast` calculates the exact mathematical ratio between two hex codes to verify compliance. This tool lets your OpenAI Agents SDK agent run real-time checks on user-submitted palettes during runtime. Your agent uses the OpenAI dashboard to trace these calls. If a contrast ratio falls below WCAG AA standards, the system triggers an automatic handoff to a correction agent.

Verify dark and light mode surfaces

`check_dark_mode_surface` and `check_light_mode_surface` evaluate how foreground elements look against standard UI backgrounds. Your agent calls these tools to ensure text remains readable when users toggle system themes. You set up guardrails in your Python code to block any layout updates that fail these specific surface checks. This keeps your interface accessible without manual QA reviews.

Validate text on absolute canvas extremes

`check_text_on_pure_black` and `check_text_on_pure_white` measure how specific text colors perform against absolute dark and light canvases. Your agent uses these endpoints to flag hard-to-read elements before they hit production. Because your agent connects via an MCP Server, it auto-discovers these tools instantly during dynamic style generation. You get immediate feedback on pure-canvas accessibility scores.

Setup guide

Set up Color Contrast Checker MCP in OpenAI Agents SDK

Prerequisites

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

1

Install the SDK

Run pip install openai-agents to install the OpenAI Agents SDK. The MCP integration is built-in — no extra dependencies needed.
2

Connect via SSE transport

Use MCPServerSse with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. The SDK auto-discovers all Color Contrast Checker tools at runtime.
3

Create your Agent

Pass the MCP to Agent(mcp_servers=[server]). The agent receives Color Contrast Checker tools as native definitions — JSON schemas resolve automatically.
4

Run the agent

Call Runner.run(agent, prompt) to execute. The agent invokes the appropriate Color Contrast Checker tools and returns structured results. Copy the full example on the right to get started.

agent.py

import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerSse

async def main():
    async with MCPServerSse(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as server:
        agent = Agent(
            name="Color Contrast Checker Agent",
            instructions="You have access to Color Contrast Checker tools.",
            mcp_servers=[server],
        )
        result = await Runner.run(agent, "List recent transactions")
        print(result.final_output)

asyncio.run(main())

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Common questions about Color Contrast Checker MCP in OpenAI Agents SDK

Register the MCP server by passing the HTTP URL to your streamable parameters. Your agent auto-discovers all eight color validation tools instantly.

Yes, if you write a fallback loop. Your agent uses the contrast checker to find failures, then passes the bad hex code to a specialized refactoring agent to generate a compliant alternative.

No, because you set caching to true to prevent redundant network requests. The actual calculations run inside the isolated Vinkius MCP sandbox.

It checks against WCAG 2.1 AA and AAA requirements. The tools return exact mathematical ratios so your agent makes objective decisions.

This MCP server only processes hex codes, RGB values, and string color names. Vinkius runs the code in an ephemeral, zero-trust sandbox, meaning no styling configuration or design data is ever stored.

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