A2A Agent Card

Before writing code

Fetch live docs:

1. Fetch https://a2a-protocol.org/latest/specification/ and look for the Agent Card schema section
2. Web-search site:github.com a2aproject A2A agent card schema for the JSON Schema definition
3. Web-search site:github.com a2aproject a2a-samples agent-card for real-world Agent Card examples
4. Fetch SDK docs for Agent Card builder/helper classes

Conceptual Architecture

What the Agent Card Is

The Agent Card is a JSON document that describes an A2A agent to potential clients. It's the discovery and capability advertisement mechanism — analogous to an OpenAPI spec for REST APIs, but for agent-to-agent communication.

Hosting