A11y Scorer

io.github.lazymac2xPublished by GitHub account lazymac2xv1.0.0Updated Oct 24, 2026

Cloudflare Workers MCP server: a11y-scorer

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingDeveloper Tools

Overview

AI-generated overview

A remote MCP server that audits web pages or raw HTML for WCAG 2.1 AA accessibility issues, checks color contrast, and extracts heading outlines.

What you can do
Fetch a URL and run a heuristic WCAG 2.1 AA audit on the page it returns, or audit raw HTML you supply directly. Evaluate color contrast for a foreground and background color pair against WCAG thresholds. Extract the heading outline from HTML to review document structure.
When to use it
Useful when reviewing a page or HTML fragment for accessibility problems, checking whether text and background colors meet contrast requirements, or inspecting heading structure before publishing or shipping a site.
Requirements
A remote endpoint; no local runtime, package, account, API key, or header is declared. The URL audit tool needs network access to the target page.
Before you install
The URL audit fetches the target page from the server side, so the address you give is sent to a third-party service. Results are described as heuristic, so treat them as a starting point rather than a compliance certification. The tools are read-only and no credentials are requested.

Installation

In SourceWeft

  1. Open A11y Scorer in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.lazymac2x%2Fa11y-scorer/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "a11y-scorer": {
      "type": "http",
      "url": "https://api.lazy-mac.com/a11y-scorer/mcp"
    }
  }
}

README

a11y-scorer-api

Cloudflare Workers MCP server: a11y-scorer. REST + MCP (JSON-RPC 2.0). Live: api.lazy-mac.com/a11y-scorer

Source: README.md at commit 1993c10

Tools

4

a11y_audit_url

Fetch a URL and return a WCAG 2.1 AA heuristic audit.

Parametersurlrequired

a11y_audit_html

Audit raw HTML for WCAG 2.1 AA issues.

Parametershtmlrequired

a11y_contrast

Evaluate WCAG color contrast for a foreground/background pair.

ParametersbgrequiredfgrequiredboldfontSize

a11y_headings

Extract heading outline from HTML.

Parametershtmlrequired

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

90% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

    Declare a license in the repository or the registry entry.