I disagree. I run a sudoku site. It’s completely static, and it gets a few tens of thousands of hits per day, as users only download the js bundle & a tiny html page. It costs me a rounding error on my monthly hosting to keep it running. To add an api or hosted mcp server to this app would massively overcomplicate it, double the hosting costs (at least), and create a needless attack surface.

But I’d happily add a little mcp server to it in js, if that means someone else can point their LLM at it and be taught how to play sudoku.