A2A Course #5 - Connect 3 Agents via A2A! Step-by-step demo + code walkthrough

Learn to - Discover available agents via a shared registry - Delegate tasks between agents seamlessly over JSON-RPC (A2A protocol) - Send queries from our cmd.py CLI (“What time is it?” / “Greet me”) and watch the agents collaborate --------------------------------------- Code Please Subscribe, allow pop-ups, then log in to The AI Language site to access our GitHub repos. This link works only for subscribers. Thanks! https://theailanguage.com/onlySubscribers?id=a2a_samples&site=github This video uses the version3_multi_agent folder of our sample repo. --------------------------------------- 🎓 Udemy Course Want a complete guided experience with quizzes, Q&A, and a completion certificate? https://www.udemy.com/course/modelcontextprotocol/?referralCode=6FADE0F85C5DB97203C6 --------------------------------------- ▶️ Watch the Previous Video - Learn the fundamentals—task managers, agent cards, JSON-RPC client/server, and more—in our first walkthrough: https://www.youtube.com/watch?v=DDaDV1wXNgg&list=PL6tW9BrhiPTCKTXXJAwigi7QDNpA7t4Ip --------------------------------------- CHAPTERS 00:00 Introduction 00:17 Quick Preview of What We’ll Build 04:31 A2A Architecture Recap 06:12 Code - Agent Discovery, Registry 10:31 Code - Orchestrator or Host Agent 15:20 Code - Agent Connector 17:33 Code - Orchestrator or Host Agent Continued 23:08 Code - Orchestrator Task Manager 24:58 Code - entry.py script 27:56 Code - Greeting Agent, Task Manager, main.py script 35:57 Code - other files, folders 37:01 Setup, Get free Gemini API Key 40:43 Running the Code --------------------------------------- Demo Walkthrough Start the TellTimeAgent python3 -m agents.tell_time_agent --host localhost --port 10000 Start the GreetingAgent python3 -m agents.greeting_agent --host localhost --port 10001 Start the Orchestrator (Host) Agent python3 -m agents.host_agent.entry --host localhost --port 10002 Launch the CLI (cmd.py) python3 -m app.cmd.cmd --agent http://localhost:10002 Try it out! What time is it? Agent says: The current time is: 2025-05-05 14:23:10 Greet me Agent says: Good afternoon, friend! The golden sun dips low... --------------------------------------- 👍 If you found this tutorial helpful, please Like, Subscribe, and hit the 🔔 to get notified about future A2A deep-dives! #A2A, #AgentOrchestration, #GoogleADK, #GeminiAPI, #MultiAgent, #CodeWalkthrough, #PythonTutorial, #AsyncIO, #CLIApp, #Discovery, #AgentProtocol, #JSONRPC