An AI-powered agent leveraging LangChain and OpenAI is developed to interact with Stripe's real APIs, with a focus on reliability and observability through Galileo's tools. This tutorial guides users in building a Typescript/Node.js AI agent capable of listing products, creating payment links, and managing customer data, all while providing real-time monitoring of tool calls, API responses, and errors. The agent supports both CLI and web interfaces, incorporating Galileo to ensure comprehensive traceability and reliability. The project integrates various tools, including the Stripe Agent Toolkit for API interactions and the Galileo Typescript SDK for monitoring, emphasizing the importance of moving from a prototype to a production-ready agent by addressing reliability and evaluation metrics. This initiative not only demonstrates the technical implementation but also underscores the significance of building trustworthy AI agents for real-world applications.