What is A2A Inspector?
A2A Inspector is a web-based tool to connect to, inspect, and validate Agent2Agent (A2A) protocol servers. Fetch an Agent Card, chat with the agent, and see real-time validation of messages for spec compliance.
FAQ
How does A2A Inspector work?
Enter an Agent Card URL and optional authentication or custom headers. The app resolves the card, negotiates a transport (JSON‑RPC, HTTP+JSON, or gRPC when available), and streams responses while validating message structure and surfacing compliance issues.
What transports and modalities are supported?
Transports depend on the agent but typically include JSON‑RPC and HTTP+JSON, with optional gRPC. Modalities often include text/plain plus images, audio, video, or general files when the agent declares support.
Who is this for?
Developers, QA engineers, and researchers working with A2A‑compliant agents who need rapid debugging, clear validation, and a simple chat workflow.
Inspector UI
Agent Card
Connect to an agent to see its card.
Chat
Messages from the agent are marked with ✅ (compliant) or ⚠️ (non-compliant). Click any message to view the raw JSON.
No active session
Messages will appear here.