Agent Card
Agent Card: The A2A JSON document describing an agent's skills, endpoints and auth, served at /.well-known/agent-card.json. Example: A2A registers the well-known URI in section 14.3 of its spec. Next in the glossary is Agent Skills: A folder with a SKILL.md file of instructions and optional scripts that agents load on demand.
Definition
The A2A JSON document describing an agent's skills, endpoints and auth, served at /.well-known/agent-card.json.
Example, with source
A2A registers the well-known URI in section 14.3 of its spec. (a2a-protocol.org, read 4 November 2026)
Where it appears on this site
Neighbouring terms
- Act layer: The part of agent readiness about completing tasks: MCP servers, CLIs, APIs with OpenAPI, WebMCP and agent payments.
- Agent Skills: A folder with a SKILL.md file of instructions and optional scripts that agents load on demand.
- Agent2Agent (A2A): A protocol for agents to discover each other and exchange tasks, now at version 1.0.0.