A tutorial demonstrates how to construct a real-time voice assistant utilizing PayPal's Model Context Protocol (MCP) to perform tasks such as creating invoices and managing subscriptions through natural conversation. The setup employs various tools, including Pipecat for orchestrating the voice pipeline, Cerebrium for serverless operation, and Daily for audio transport, integrating technologies like Deepgram for speech-to-text, OpenAI for language models, and Cartesia for text-to-speech. The process involves creating a Daily meeting room for interaction, setting up a pipeline with different services, and generating a PayPal access token for authentication. This tutorial exemplifies how voice-driven automation can be harnessed for real-world applications, expanding the potential for customer support, internal operations, and merchant tools through the integration of large language models with APIs.