A2A Agent Card Checker
Check for an Agent2Agent Agent Card at the protocol's documented discovery path.
Fetches /.well-known/agent.json, the Agent Card that describes an agent's identity, skills and endpoints so other agents can call it. It only applies to sites that expose an agent for other agents to use.
This is one of the checks the AI Agent Readiness Checker scores under API, Auth, MCP & Skill Discovery, and it can also be run on its own for any URL.
Based on: Agent2Agent (A2A) Protocol
About this validation
Checks for an Agent Card at the Agent2Agent protocol's documented discovery path.
- Protocol / standard:
- Rules reviewed:
- Nov 11, 2026
Standards and vendor-documented behavior can change. This reflects the source as last reviewed above, not a permanent guarantee.