It has nothing to do with Agents/LLMs which is why it's not called "Agentic Payment Protocol."

It's an API for making purchases instead of interacting with a website of unknown flow.

The text literally starts with:

  > We believe agents will become an integral part of the internet economy, and they need the ability to transact with businesses and one another. 
  > MPP provides a specification for agents and services to coordinate payments programmatically, enabling microtransactions, recurring payments, and more.

Obviously agents are the big thing right now, but that doesn't change the fact that MPP is an automation solution