Show HN: WebMCP: A proposal + code for websites to support client side LLMs

WebMCP allows websites to share tools, resources, prompts, etc. to LLMs. In other words, WebMCP allows a website to be an MCP server. No sharing API Keys. Use any model you want.

This is a bit of a proposal, bit of a project.

The idea here is, what if websites built specifically for users who wanted to use their website via an LLM - what would that require?

Today it's either Playwright or there's an API that can be interacted with, hopefully someone built an MCP server wrapper for it...

So I built a prototype and published it (open source, MIT).

It removes the cost of operating an LLM from website owner, as the burden of LLM use is on the user. And for the user, it's lower friction than using API tools and more private than using a website's LLM. Also opens up the door for websites that don't have accounts etc.

Let me know if you have any questions!

Tried using it, it generates key but after pasting it, registration fails. Is it currently live?