The global COVID-19 pandemic has accelerated the adoption of video calling as a vital tool for business meetings and professional discussions, revolutionizing the way people communicate remotely. To develop an effective video calling API, several essential features should be considered, including single and group chats, content sharing, enhanced quality, call recording, and scalability. Various video calling APIs and SDKs are available, each offering unique features and pricing structures, such as Video SDK, Agora, Twilio, AWS Chime SDK, Zoom Video SDK, Vonage, 100ms, EnableX, LiveKit, and Whereby. These platforms cater to diverse needs, ranging from basic communication tools to advanced features like real-time streaming, screen sharing, and cloud recording. When selecting a video calling API, it's crucial to evaluate the features, pricing, and scalability options to ensure they align with your business requirements.