The MCP landscape is a huge frothing septic tank. Go on, try to create a simple MCP server that is protected by a password and connect it to ChatGPT or Claude. Or even the one that uses your local SSO system for authentication.
I tried and failed after about 3 days of dealing with AI-slop-generated nonsense that has _never_ been worked. The MCP spec was created probably by brainless AI agents, so it defines two authentication methods: no authentication whatsoever, and OAuth that requires bleeding-edge features (dynamic client registration) not implemented by Google or Microsoft.
The easiest way for that right now is to ask users to download a random NodeJS package that runs locally on their machines with minimal confinement.