W3c Mcp Server

Name: W3c Mcp Server
Author: shuji-bonji

@shuji-bonji

About W3c Mcp Server

MCP Server for accessing W3C/WHATWG/IETF web specifications. Provides AI assistants with access to official web standards data including specifications, WebIDL definitions, CSS properties, and HTML elements.

#w3c #web-standards #specifications #webidl #css #html #pwa #documentation

Basic information

Config

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

{
  "mcpServers": {
    "w3c": {
      "command": "npx",
      "args": [
        "-y",
        "@shuji-bonji/w3c-mcp"
      ]
    }
  }
}

Tools

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We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is W3c Mcp Server?

W3c Mcp Server is an MCP (Model Context Protocol) server that provides AI assistants with access to official W3C, WHATWG, and IETF web standards data, including specifications, WebIDL definitions, CSS properties, and HTML elements. It is built for developers who need programmatic access to web specification data.

How to use W3c Mcp Server?

Install globally via npm install -g @shuji-bonji/w3c-mcp or use directly with npx @shuji-bonji/w3c-mcp. Configure it in Claude Desktop or Cursor by adding a JSON entry with the npx command. Enable debug logging with W3C_MCP_DEBUG=true or W3C_MCP_PERF=true environment variables.

Key features of W3c Mcp Server?

Specification discovery with filtering by organization and keyword
WebIDL interface definitions for JavaScript APIs
CSS property definitions by specification or name
HTML element definitions from multiple specs
PWA-related specification grouping and dependency info
Fast startup (~70ms) and O(1) spec lookups

Use cases of W3c Mcp Server?

Find and inspect Service Worker interface definitions
Explore all PWA-related specifications in one call
Look up CSS Grid layout properties and values
Search for storage-related web specifications
Retrieve HTML element definitions like video or canvas

FAQ from W3c Mcp Server

What data sources

Comments

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