A2A (Agent-to-Agent) integration

Expose an AG2 Agent over the A2A protocol — a standard JSON-RPC / REST / gRPC contract plus a discoverable AgentCard — so other systems can call your agent over the network. The same module also lets an AG2 Agent consume a remote A2A agent by using A2AConfig as the agent's model config.

When to use

• You want an AG2 agent reachable as a standard networked service that non-AG2 A2A clients can call (interop), not just from Python.
• You need a discoverable agent: a published AgentCard at /.well-known/agent-card.json describing the agent's skills, transports, auth, and capabilities.
• You want a choice of transport (JSON-RPC, REST, or gRPC) — possibly several at once from one server.
• You need declared auth schemes (bearer / API key / OAuth2 / OIDC / mTLS), push notifications, or multi-tenancy surfaced on the card.
• Conversely, you want one AG2 agent to call a remote A2A agent as if it were an LLM provider — use A2AConfig as the calling agent's config.

If you only need a web frontend (React/CopilotKit) in front of an agent, use the AG-UI skill instead. If two AG2 agents simply need to talk inside one process/cluster, the AG2 network is the standard multi-agent pattern.

Installation

pip install "ag2[a2a]"