Web Standards Specs

https://whatwg-spec-mcp.jasnell.workers.dev/mcp

● healthy

Search and read web standards from WHATWG, IETF, W3C, MDN, Can I Use, WPT, Node.js, and TypeScript via remote Cloudflare Workers.

Transport

streamable_http

Auth

open

Cost

free

How to connect

MCP endpoint (streamable_http)

https://whatwg-spec-mcp.jasnell.workers.dev/mcp

JSON-RPC initialize probe

curl -X POST https://whatwg-spec-mcp.jasnell.workers.dev/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}'

Source code

https://github.com/jasnell/spec-mcps

Listed at (pulsemcp)

https://www.pulsemcp.com/servers/jasnell-web-standards-specs