How to Build a Fullstack Agent with Auth and Payments Using LangGraph

his guide demonstrates how to create a fullstack agent application with LangGraph and the LangGraph Platform, featuring custom authentication and payment integration. LangGraph, an orchestration framework built by LangChain, enables developers to design sophisticated agent workflows using a graph-based structure—ideal for complex, multi-step processes. With built-in support for custom authentication, middleware, and usage tracking, you can deploy secure, production-ready agents that handle sensitive operations like payments. The tutorial covers everything from defining agent states and nodes to integrating external tools and managing user sessions, making it a practical resource for building advanced, real-world AI agent systems.