MCP is APIs for Agents

REST APIs gave humans (and the code they wrote) a standardized way to access software over the network. MCP is trying to do the same thing for agents. That simple framing clears up a lot of confusion. For nearly 20 years we built systems assuming the caller was a human developer writing code against APIs. Now the caller is increasingly an LLM-driven agent. MCP changes the interface layer accordingly. The REST Era: APIs Designed for Humans With REST + OpenAPI, the typical flow looked like this: H