Google publishes A2A in an open GitHub repository
Agent-to-agent tasking has a repo. Settlement is still a different layer.
protocol
Agent2Agent
Google-announced protocol for agent-to-agent tasking, positioned as complementary to MCP.
Machine: /v1/intelligence/entity/a2a · Graph: /v1/graph/entities/a2a
Graph relationships
Timeline
Google publishes Agent2Agent as an interoperability bet
A2A aims at agent-to-agent tasking across vendors, complementary to MCP tool calling.
Google announces the Agent Payments Protocol (AP2)
A payment-agnostic mandate framework meant to sit beside A2A and MCP.