localhost-bound-mcp-server-unreachable-by-desktop-connector

Claude Desktop runs on the user’s Mac and bridges to a remote VPS over SSH. Any MCP server bound to 127.0.0.1:<port> on the VPS is not reachable by the Desktop app — there is no tunnel for localhost ports. To migrate such a server to the Desktop connector list, it must first be exposed via a Traefik HTTPS route with a public subdomain (e.g., xint-mcp.arjtech.in). xint was the concrete case: bound to 127.0.0.1:18207, required full Traefik file-provider route creation before Desktop migration was possible.