Aether WCAG Scanner MCP Server

by allchemylabsio.github.allchemylabs/aether-wcag-scannerv1.0.6

WCAG 2.1 AA accessibility scanner (Playwright + axe-core) with grounded, browser-verified fixes. MCP server for Claude Code and any MCP client; also a Claude Code plugin.

1Node.jsstdioofficial registry

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Active2d ago

Install Aether WCAG Scanner MCP server

claude mcp add aether-wcag-scanner -e ALLCHEMY_API_KEY='<allchemy-api-key>' -- npx -y @allchemylabs/aether-wcag-scanner

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

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

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

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "aether-wcag-scanner": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@allchemylabs/aether-wcag-scanner"
      ],
      "env": {
        "ALLCHEMY_API_KEY": "<allchemy-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

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

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
ALLCHEMY_API_KEY	—	yes	Beta API key from https://beta.allchemylabs.ai/?src=registry (optional: without it the scanner runs fully offline with template fixes)

Freshness

Active — last maintenance signal 2d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-07 · 2d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-06 · 3d ago · official registry · v1.0.6

FAQ

›How do I install the Aether WCAG Scanner MCP server in Claude Code?

Run: claude mcp add aether-wcag-scanner -e ALLCHEMY_API_KEY='<allchemy-api-key>' -- npx -y @allchemylabs/aether-wcag-scanner. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Aether WCAG Scanner require an API key?

Yes. It expects ALLCHEMY_API_KEY, of which 1 is a secret.

›Can I use Aether WCAG Scanner as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Aether WCAG Scanner in the official MCP registry?

Yes, as io.github.allchemylabs/aether-wcag-scanner.