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Google A2A Protocol
LiveOpen agent communication protocol with 150+ supporting organizations
Project Information
Category:Protocols
Released:2025
Developer:Google -> Linux Foundation
License:Open Source (Apache 2.0)
protocolstandardagent-communication
About
Released by Google in April 2025, with 50+ technology partners (Atlassian, Box, Cohere, PayPal, Salesforce, SAP, etc.). Core concepts: Agent Card (`/.well-known/agent.json`), Task, Message/Part. Built on HTTP/SSE/JSON-RPC.
Complementary to Anthropic MCP: MCP handles Agent-to-Tool, A2A handles Agent-to-Agent. Donated to Linux Foundation in June 2025, v0.3 released in July adding gRPC support, now with 150+ supporting organizations.