Allows looking up CSS specifications (e.g., css-grid-1) and provides details such as status, working groups, and official URLs.
Allows looking up SVG specifications and provides details such as status, working groups, and official URLs.
Allows looking up WebAuthn specifications and provides details such as status, working groups, and official URLs.
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@mcp-w3c What spec defines the CSS grid layout?"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
W3C MCP — web-standards lookup over w3c/browser-specs (GitHub, CF-reachable).
Part of Pipeworx — an MCP gateway connecting AI agents to 1346+ live data sources.
Tool | Description |
| Find W3C / web-standards specifications by keyword or topic — HTML, CSS, WCAG accessibility, DOM, SVG, WAI-ARIA, WebAuthn, Fetch, and 800+ others. Answers "what W3C spec defines X", "the CSS grid specification", "web accessibility standard", "which spec covers custom elements". Returns specs with shortname, title, status (Recommendation / Working Draft / Living Standard), organization, and official URL. Example: w3c_search({ query: "flexbox" }). |
| Detail for one web-standards spec by shortname ("WCAG21", "css-grid-1", "html") or title fragment ("web content accessibility"). Returns title, status, organization (W3C/WHATWG), working groups, series, official URL, editor's-draft URL. Example: w3c_spec({ spec: "WCAG21" }). Accepts shortname/name/title too. |
Related MCP server: w3c-mcp
Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):
{
"mcpServers": {
"w3c": {
"url": "https://gateway.pipeworx.io/w3c/mcp"
}
}
}Or connect to the full Pipeworx gateway for access to all 1346+ data sources:
{
"mcpServers": {
"pipeworx": {
"url": "https://gateway.pipeworx.io/mcp"
}
}
}Instead of calling tools directly, you can ask questions in plain English:
ask_pipeworx({ question: "your question about W3c data" })The gateway picks the right tool and fills the arguments automatically.
MIT
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If you are the server author, to access and configure the admin panel.
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