MCP (Model Context Protocol) is everywhere right now. Claude uses it, Cursor uses it, a ton of AI tooling is being built on top of it. There's an official SDK, servers, transports, capabilities negotiation... it can feel like a lot.

But when I actually dug into what MCP is doing at its core, I realized — it's just structured JSON going back and forth. That's the whole idea. So I built a minimal ve