AI Agent Demo provides a versatile template for constructing AI agents that can interact with users and external data sources. It leverages LangChain to orchestrate chains, tools, and memory modules, enabling the agent to perform tasks such as web searches via SerpAPI, summarize web content, maintain conversation history with vector-based memory, and execute code snippets through a secure Python REPL tool. The agent exposes CLI commands and HTTP endpoints via FastAPI, supporting both text and voice input. Developers can customize tool definitions and chain logic to tailor agents for customer support, data retrieval, or automated workflows. The modular architecture simplifies integration of new capabilities like database queries or third-party APIs.