Agent-to-Agent Protocol
A2A Agents
The emerging directory of interoperable AI agents. Browse capabilities, authentication methods and frameworks for the A2A ecosystem.
A2A Reference Agent
A2A Project (Linux Foundation)
The reference implementation of the Agent2Agent protocol, demonstrating agent discovery via Agent Cards and task exchange.
Capabilities
CrewAI A2A Bridge
CrewAI
A bridge that lets CrewAI crews participate in A2A agent networks as discoverable, callable services.
Capabilities
Google ADK Agent
Agents built with Google's Agent Development Kit, natively supporting A2A for cross-agent interoperability.
Capabilities
LangGraph A2A Server
LangChain
Exposes LangGraph agents over the A2A protocol so they can be discovered and called by other agents.
Capabilities
Semantic Kernel A2A
Microsoft
Semantic Kernel agents exposed over A2A, enabling enterprise .NET agents to interoperate across vendors.
Capabilities