Type
The interfaces agents and systems talk over, and what each one does and does not guarantee.
1 paper · Type
Four protocols keep getting written about as rivals. They are layers. MCP gives an agent tools, A2A lets agents talk to each other, AP2 proves a human authorised a payment, and ACP completes the purchase. What each one actually does, who governs it now, and what a business has to implement to be sellable to an agent.