MCP Transport Types Explained: stdio, SSE, and HTTP Streamable, Which One Do You Actually Need?

So you’ve started looking into MCP servers and you’ve hit a wall almost immediately. The docs mention stdio, SSE, and HTTP Streamable, and unless you’ve spent time in the web development world, it’s not obvious what any of these mean or why you’d pick one over another. Here’s the thing: the transport layer is one of the most important decisions you’ll make when building an MCP server. Get it wrong and you’ll either build something that only works on your laptop, or you’ll over-engineer a production deployment when a two-liner would have done the job....

March 14, 2025 · 9 min · David Henderson