Is io.github.allchemylabs/aether-wcag-scanner safe to use?

io.github.allchemylabs/aether-wcag-scanner has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under MIT.

How do I install io.github.allchemylabs/aether-wcag-scanner?

io.github.allchemylabs/aether-wcag-scanner supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can io.github.allchemylabs/aether-wcag-scanner do?

io.github.allchemylabs/aether-wcag-scanner provides 4 tools: url, Requirements, Disclaimer, License. See the full tools list on the server page for descriptions and parameters.

What AI clients work with io.github.allchemylabs/aether-wcag-scanner?

io.github.allchemylabs/aether-wcag-scanner is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.

Is io.github.allchemylabs/aether-wcag-scanner actively maintained?

io.github.allchemylabs/aether-wcag-scanner is actively maintained - last commit was 24 days ago. It has 2 GitHub stars.

io.github.allchemylabs/aether-wcag-scanner

@allchemylabs/aether-wcag-scanner

WCAG 2.1 AA accessibility scanner (Playwright + axe-core) with grounded, browser-verified fixes.

2 76/wk 4 tools GitHub npm

No known CVEs

MIT license

Actively maintained

Last commit 24d ago

Works with most clients

Transport: stdio, sse, http

4 tools · ~114 tok

Grade A · 0.1% of 200K ctx

MCPpedia last refreshed this data 17h ago

Edit this pageView history

io.github.allchemylabs/aether-wcag-scanner is an MCP server that WCAG 2.1 AA accessibility scanner (Playwright + axe-core) with grounded, browser-verified fixes. Its tool list has not been published yet over stdio, sse and http, requires no API key, and scores 85/100 on MCPpedia's security, maintenance and efficiency rubric.

Browser

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "aether-wcag-scanner": {
      "env": {
        "ALLCHEMY_API_KEY": "<your beta key>"
      },
      "args": [
        "-y",
        "@allchemylabs/aether-wcag-scanner"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-allchemylabs-aether-wcag-scanner)](https://mcppedia.org/s/io-github-allchemylabs-aether-wcag-scanner)

Read me

What io.github.allchemylabs/aether-wcag-scanner does

WCAG 2.1 AA accessibility scanner (Playwright + axe-core) with grounded, browser-verified fixes.

Test This Server

This server supports HTTP transport. Be the first to test it - help the community know if it works.

Loading README…

Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

85/100across 5 weighted dimensions

How we score →

0255075100

−15

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @allchemylabs/aether-wcag-scanner against OSV.dev.

Inventory

Tools (4)

Click any tool to inspect its schema.

~114 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience - it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.allchemylabs/aether-wcag-scanner safe to use?: io.github.allchemylabs/aether-wcag-scanner has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under MIT.
How do I install io.github.allchemylabs/aether-wcag-scanner?: io.github.allchemylabs/aether-wcag-scanner supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.allchemylabs/aether-wcag-scanner do?: io.github.allchemylabs/aether-wcag-scanner provides 4 tools: url, Requirements, Disclaimer, License. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.allchemylabs/aether-wcag-scanner?: io.github.allchemylabs/aether-wcag-scanner is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is io.github.allchemylabs/aether-wcag-scanner actively maintained?: io.github.allchemylabs/aether-wcag-scanner is actively maintained - last commit was 24 days ago. It has 2 GitHub stars.

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Discussion

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Browser

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "aether-wcag-scanner": {
      "env": {
        "ALLCHEMY_API_KEY": "<your beta key>"
      },
      "args": [
        "-y",
        "@allchemylabs/aether-wcag-scanner"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-allchemylabs-aether-wcag-scanner)](https://mcppedia.org/s/io-github-allchemylabs-aether-wcag-scanner)

Read me

What io.github.allchemylabs/aether-wcag-scanner does

WCAG 2.1 AA accessibility scanner (Playwright + axe-core) with grounded, browser-verified fixes.

Test This Server

This server supports HTTP transport. Be the first to test it - help the community know if it works.

README

Aether WCAG Scanner

An MCP server for Claude Code, Cursor, Codex and other coding agents that finds WCAG 2.1 AA accessibility violations and returns ready-to-apply fixes — not just a list of problems.

It drives a real browser (Playwright + axe-core) across desktop, tablet, and mobile viewports, then pairs each violation with a concrete fix: corrected HTML, the relevant WCAG success criteria, and technique code examples.

It works free without a key. For higher quality, contextual fixes, get a beta key at beta.allchemylabs.ai (sign in with GitHub).

Why it's different

An AI coding agent working from markup alone has to infer what a page does. Aether runs the page in a real browser, measures it with axe-core, and grounds every suggested fix in the WCAG spec, so the agent is working from measurements rather than inference.

	Coding agent alone	Aether, offline	Aether, with API key
How it looks at the page	Reads the HTML it is given	Renders the page in Chromium at desktop, tablet and mobile widths and runs axe-core	Same
What it can measure	Structure visible in the markup	What axe measures on the rendered page: contrast, accessible names, ARIA usage, focusable regions, landmarks	Same
Fix suggestions	From the model's general knowledge	Deterministic templates for the common rules	Templates first, then WCAG-corpus examples, then a model; every cited technique passes a grounding check
How fixes are checked	Not checked unless you set that up	axe re-run on the fixed element; reports what cleared and what regressed	Same
What each fix cites	Whatever the model recalls	The axe rule and its severity	The WCAG success criteria and techniques, with rejected candidates shown
Network	Depends on the agent	None; runs entirely on your machine	Fix requests go to the hosted engine; falls back to offline templates when it is unreachable

Install

/plugin marketplace add https://github.com/allchemylabs/claude-plugins.git
/plugin install aether-wcag-scanner@allchemylabs

Once the official Claude Code marketplace listing is live, you can also install it directly from there.

Installing with /plugin install inside Claude Code prompts for your Allchemy Labs API key; paste the key you got from beta.allchemylabs.ai. Installing from the terminal (claude plugin install …), or letting Claude run the install for you, does not prompt, so set the key afterwards with the command below. Run the same command to change the key later:

/plugin configure aether-wcag-scanner@allchemylabs

The first start installs the plugin's dependencies (about a minute) and the first scan downloads Chromium for Playwright. If /mcp shows the server as not connected right after install, wait a moment and run /reload-plugins.

Running without a key

The plugin asks for a key at install because the cloud fixes need one. The scanner itself runs locally and still works without a key (for example after a terminal install, or via npx): you get local template fixes for every violation. A beta key adds higher quality, contextual fixes from the hosted insights engine; get one at beta.allchemylabs.ai (sign in with GitHub). Set it via the prompt above, or put ALLCHEMY_API_KEY=<key> in the .env of the project you are scanning.

Use it outside Claude Code (any MCP client)

The same server is published to npm and the MCP Registry as @allchemylabs/aether-wcag-scanner. Any MCP client that speaks stdio can run it:

{
  "mcpServers": {
    "aether-wcag-scanner": {
      "command": "npx",
      "args": ["-y", "@allchemylabs/aether-wcag-scanner"],
      "env": { "ALLCHEMY_API_KEY": "<your beta key>" }
    }
  }
}

The first scan downloads Playwright's Chromium once (about 500 MB on dis

... View full README on GitHub

Loading README…

Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

85/100across 5 weighted dimensions

How we score →

0255075100

−15

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @allchemylabs/aether-wcag-scanner against OSV.dev.

Inventory

Tools (4)

Click any tool to inspect its schema.

~114 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience - it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.allchemylabs/aether-wcag-scanner safe to use?: io.github.allchemylabs/aether-wcag-scanner has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under MIT.
How do I install io.github.allchemylabs/aether-wcag-scanner?: io.github.allchemylabs/aether-wcag-scanner supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.allchemylabs/aether-wcag-scanner do?: io.github.allchemylabs/aether-wcag-scanner provides 4 tools: url, Requirements, Disclaimer, License. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.allchemylabs/aether-wcag-scanner?: io.github.allchemylabs/aether-wcag-scanner is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is io.github.allchemylabs/aether-wcag-scanner actively maintained?: io.github.allchemylabs/aether-wcag-scanner is actively maintained - last commit was 24 days ago. It has 2 GitHub stars.