Tactual MCP

@tactual-dev

About Tactual MCP

Screen-reader navigation cost analyzer — models the real effort to discover, reach, and operate interactive web content

#accessibility #screen-reader #testing #playwright #a11y

Config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "tactual": {
      "command": "npx",
      "args": [
        "tactual-mcp"
      ]
    }
  }
}

Tools

No tools detected

Fetch the live tool list by running this server in a temporary sandbox using the button above.

Overview

What is Tactual MCP?

Tactual MCP is a server for the Tactual screen-reader navigation cost analyzer. It measures how many keystrokes a screen-reader user needs to discover, reach, and operate every interactive target on a webpage, under AT profiles such as NVDA, JAWS, and VoiceOver. It is built for developers analyzing their own sites and staging environments, complementing conformance scanners like axe-core.

How to use Tactual MCP?

Install the tactual npm package (requires Node.js 20+). The MCP server runs as tactual-mcp and is included with the package. After installation, configure your MCP client to invoke the tactual-mcp command. Tools such as analyze-url, diff-results, transcript, and validate-url are available via the CLI and can be used through the MCP server.

Key features of Tactual MCP

Measures navigation cost (keystrokes) for screen-reader users
Supports AT profiles: NVDA, JAWS, VoiceOver
Explores hidden UI with keyboard probing (menus, dialogs, tabs)
Simulates screen-reader announcements and transcripts
Outputs JSON, Markdown, and SARIF formats
Diff analysis for before/after verification
Optional validation against virtual screen reader

Use cases of Tactual MCP

Triage accessibility navigation cost across a site or route
Verify code changes by comparing baseline and candidate analysis
Analyze specific interactive widgets (menus, dialogs, form errors)
Generate compact evidence (selectors, penalties, remediation candidates) for issues or PRs
Run in CI to catch regressions in screen-reader navigation cost

FAQ from Tactual MCP

How does Tactual differ from conformance checkers like axe-core?

Tactual measures navigation cost (keystrokes to reach and operate targets), whereas conformance tools check WCAG/ARIA rule violations. Tactual is intended as a second pass after markup is valid.

What are the runtime requirements?

Node.js 20 or later. Playwright and MCP SDK are bundled as runtime dependencies, so one-off npx commands work without separate Playwright installs.

Frequently asked questions

How does Tactual differ from conformance checkers like axe-core?

Tactual measures navigation cost (keystrokes to reach and operate targets), whereas conformance tools check WCAG/ARIA rule violations. Tactual is intended as a second pass after markup is valid.

What are the runtime requirements?

Node.js 20 or later. Playwright and MCP SDK are bundled as runtime dependencies, so one-off npx commands work without separate Playwright installs. ###

Comments

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