This comprehensive tutorial walks you through building a sophisticated AI-powered English learning agent using OpenAI’s Realtime API, the OpenAI Agents SDK, and

This comprehensive tutorial walks you through building a sophisticated AI-powered English learning agent using OpenAI’s Realtime API, the OpenAI Agents SDK, and advanced tool calling capabilities. We’ll explore how to create an interactive voice agent that provides personalized learning experiences through backend API integration. Table of Contents Project Overview Architecture & Technology Stack Setting Up the Foundation Building the Agent Configuration System Implementing Tool Calling for API Integration Creating the Realtime Voice Agent Implementing Guardrails & Content Moderation Frontend Integration with Next.js Real-time Session Management Testing & Deployment Best Practices & Lessons Learned Project Overview Englify is an AI-powered English tutoring assistant that leverages: Real-time voice conversations using OpenAI’s Realtime API Intelligent tool calling to access backend learning resources Personalized learning through user profile and progress tracking Content moderation to ensure safe, educational interactions Responsive web interface built with Next.js and React Key Features Voice-activated English conversation practice Personalized content recommendations based on user level Real-time access to podcasts, movies, books, and learning materials Leaderboard and progress tracking Educational content filtering and moderation Architecture & Technology Stack