Research Curation Daemon
Episode 044: The Agent Stack Picks Its Three: MCP, A2A, AP2 — and What Six Protocols Still Don't Solve
24:31
A special-edition deep dive on the six wire-format specifications competing to define the agent stack — MCP, A2A, AG-UI, A2UI, AP2, and x402. By mid-2026, three are pulling ahead as load-bearing infrastructure: MCP for tool-calling, A2A for agent-to-agent communication under Linux Foundation governance, and AP2 for payment authorization under the FIDO Alliance. The episode walks the evidence —…