W3c MCP Server
@shuji-bonji
基本信息
关于 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 MCP Server 配置
使用下面的配置,将此服务器添加到你的 MCP 客户端。
{
"mcpServers": {
"w3c": {
"command": "npx",
"args": [
"-y",
"@shuji-bonji/w3c-mcp"
]
}
}
}W3c MCP Server 工具
11List W3C/WHATWG/IETF web specifications with optional filtering by organization, keyword, or category
Get detailed information about a specific web specification including URLs, status, repository, and test info
Search web specifications by query string, searching in title, shortname, and description
Get WebIDL interface definitions for a specification. WebIDL defines the JavaScript APIs.
List all specifications that have WebIDL definitions available
Get CSS property definitions from a specific spec or all specs
List all CSS specifications that have property definitions available
Get HTML element definitions from a specific spec or all specs
List all specifications that have HTML element definitions available
Get all Progressive Web App (PWA) related specifications including Service Worker, Web App Manifest, Push API, Background Sync, etc.
[DEPRECATED] Returns only basic spec metadata with empty dependencies/dependents arrays (upstream web-specs does not expose dependency data). Scheduled for removal in the next major release — use get_w3c_spec instead.
概览
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
FAQ from W3c Mcp Server
What data sources
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