Build AI Voice Agent with OpenAI Realtime API is a practical multi-part course that teaches learners how to design and develop advanced voice-based AI agents from scratch. The course begins with the fundamentals of building an AI voice agent using the OpenAI Realtime API, showing how real-time voice interaction works between users and AI systems. It then expands into more advanced capabilities such as Retrieval-Augmented Generation (RAG), enabling the voice agent to access external knowledge sources and provide more accurate and context-aware responses. Learners will also explore function calling, which allows the AI agent to execute real-world actions and connect with external tools or APIs. In the final part, the course demonstrates how to build a backend system using Make.com, helping automate workflows and manage the AI voice agent efficiently. This structured approach helps learners understand both the frontend voice interaction and backend automation required to build production-ready systems. The course is ideal for developers and AI enthusiasts who want to move beyond text-based agents and build interactive voice AI applications. By the end of the course, learners will have the skills to design, build, and deploy fully functional AI voice agents using modern AI tools and automation platform