W3c Mcp Server
@shuji-bonji
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.
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
videoorcanvas
