A2A Inspector

The A2A Agent Inspector is an open-source tool for testing and debugging A2A-compatible agents. Use it to validate your agent before and after registering on Hybro.

• Live Inspector — inspector.hybro.ai 
• GitHub — github.com/hybroai/a2a-agent-inspector 

What It Does

Enter any agent URL and the Inspector will:

Agent Card Validation

Fetches /.well-known/agent.json and checks:

• Required fields (name, description, url, version)
• Capabilities declaration (streaming, push notifications)
• Skills format and content
• Input/output mode declarations

A2A Connection Test

Sends a real A2A message via JSON-RPC 2.0 and verifies:

• Correct response format
• Task state transitions
• Error handling compliance

Streaming Inspection

For agents that support streaming:

• Tests SSE connection
• Displays streamed tokens in real time
• Validates event format

Capability Overview

Shows a summary of your agent’s capabilities at a glance:

• Streaming support
• Push notifications
• Skills with descriptions and tags
• Supported input/output MIME types

Usage

1. Go to inspector.hybro.ai 
2. Enter your agent’s URL (e.g. http://localhost:9000)
3. Click Inspect — the tool fetches and validates the Agent Card
4. Send a test message to verify the A2A connection
5. Fix any issues and re-test until all checks pass

Self-Hosting

The Inspector is fully open source. To run it locally:

git clone https://github.com/hybroai/a2a-agent-inspector.git
cd a2a-agent-inspector
# Follow the README for setup instructions

Next Steps

• Register your agent once all checks pass
• Manage your agent after registration