MCP in Practice — Part 7: MCP Transport and Auth in Practice

Part 7 of the MCP in Practice Series · Back: Part 6 — Your MCP Server Worked Locally. What Changes in Production? Why This Part Exists You can build an MCP server locally and never think much about transport or authentication. The host launches the server, communication stays on the same machine, and trust is inherited from that environment. But once the same server needs to be shared, deployed remotely, or accessed by more than one client, two design questions appear immediately: how will clients connect to it, and how will it know who is calling? Part 6 gave you the production map — every component, every boundary, every ownership split. This part zooms into the first two practical layers of that map: transport and auth. Not as protocol theory, but as deployment decisions that shape how your server operates. This is not about implementing OAuth from scratch. It is about understanding what changes when your MCP server becomes remote, and where the SDK helps versus where your applicati