# How to test MCP Apps for accessibility, and why it matters

DevFeed: [How to test MCP Apps for accessibility, and why it matters](<https://devfeed.tech/articles/how-to-test-mcp-apps-for-accessibility-and-why-it-matters-63358.md>)

Original publisher: [Read original article](<https://www.deque.com/blog/how-to-test-mcp-apps-for-accessibility-and-why-it-matters/>)

Author: Harris Schneiderman

Published: 2026-10-01T13:33:34Z

Content type: tutorial

Language: en

Sources: [Deque](<https://devfeed.tech/sources/deque.md>)

Topics: [User interface design](<https://devfeed.tech/topics/ui-design.md>), [Web Content Accessibility Guidelines](<https://devfeed.tech/topics/web-content-accessibility-guidelines.md>), [axe DevTools](<https://devfeed.tech/topics/axe-devtools.md>), [axe MCP Server](<https://devfeed.tech/topics/axe-mcp-server.md>), [MSP MCP](<https://devfeed.tech/topics/msp-mcp.md>)

Tags: [a11y-for-developers](<https://devfeed.tech/tags/a11y-for-developers.md>), [accessibility](<https://devfeed.tech/tags/accessibility.md>), [accessibility-testing](<https://devfeed.tech/tags/accessibility-testing.md>), [ai](<https://devfeed.tech/tags/ai.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [mcp](<https://devfeed.tech/tags/mcp.md>), [web](<https://devfeed.tech/tags/web.md>)

## AI overview

The tutorial explains how to test MCP Apps for accessibility by replaying host messages with a local stub host, making app states addressable through fixture URLs, and scanning each state with accessibility tools. It also covers keyboard access, headings, color and contrast, safe-area insets, and media query behavior.

## Source excerpt

MCP Apps are still new enough that whatever approaches we can establish now will be the ones that stick over the long term. Which means if we can get accessibility right at this stage, it will stay right as the ecosystem grows. This is how we can avoid introducing the same problems we've had to deal with across the rest of the web for so long. The post How to test MCP Apps for accessibility, and why it matters appeared first on Deque.