Build Your Own AI Agent from Scratch (LangGraph + Python Tutorial)
Last Updated on August 28, 2025 by Editorial Team
Author(s): A.Venkatesh
Originally published on Towards AI.
Build Your Own AI Agent from Scratch (LangGraph + Python Tutorial)
In this blog, you’ll learn how to build a conversational chatbot powered by a LangGraph agent that can decide whether to use tools (like Wikipedia or Python) or answer directly using LLM.
This article provides a comprehensive guide to creating a conversational chatbot using LangGraph, covering the setup of a FastAPI project, the integration of tools like Wikipedia and Python REPL, and a step-by-step walkthrough of the implementation process. It also includes examples of how to define an API endpoint, manage state, and visualize the interaction flow, ensuring readers have all the necessary components to build their own AI agent.
Read the full blog for free on Medium.
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