# Transports, packages and endpoints

Lesson 2 of [MCP foundations for buyers](https://mcpdirectory.fyi/academy/mcp-foundations.md), 12 minutes.

A transport is the mechanism that carries protocol messages. The 2025-06-18 specification defines two standard transports. stdio The client launches the server as a subprocess. The server reads messages from its standard input and writes messages to its standard output. The specification says the se…

The rest of this lesson is for learners enrolled in the course. [See how MCP foundations for buyers works](https://mcpdirectory.fyi/academy/mcp-foundations.md).

Also on the [web page](https://mcpdirectory.fyi/academy/mcp-foundations/transports-and-packages).