Please add support for doing StreamableHTTP MCP servers over Unix domain sockets and named pipes. For local MCP servers, this is generally more secure than standard localhost HTTP. Standard IO servers are still preferable for local MCP servers, but some scenarios are better served by StreambleHTTP--for example, an MCP server can be hosted in the extension host process by an extension using this approach.

I plan to submit a pull request for this.

/cc @connor4312