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W3C MCP — web-standards lookup over w3c/browser-specs (GitHub, CF-reachable).
npx @getmcp/cli add io.github.pipeworx-io/w3cRequires Node.js 18+. Community-contributed server. Review source before installing.
Config file: ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"io.github.pipeworx-io/w3c": {
"url": "https://gateway.pipeworx.io/w3c/mcp",
"transport": "streamable-http"
}
}
}