Twilio Flex is a popular tool among contact centers, known for its scalability and flexibility. To automate first-line support with Twilio Flex, an integration with vapi.ai can be created to provide 24/7 customer frontline support while keeping human agents focused on complex issues. This solution eliminates the need for bots and time-consuming tasks, providing immediate agent responses that sound natural, increasing customer satisfaction, decreasing workload on human agents, and ensuring context switching and knowledge transfer in real-time. The integration involves building a frontend with vapi.ai SDK, a backend API with Twilio TaskRouter, and utilizing pre-built examples to create a seamless experience for both customers and agents. Key components include the Vapi web SDK, which initializes the client, starts the conversation with the LLM provider (e.g., ChatGPT), and passes prompts to ensure natural conversations. The solution also leverages Vapi Web SDK events to get transcription of calls in case issues are escalated to real agents. Finally, Twilio TaskRouter is used to create tasks for agents, integrating the call summary extracted from vapi.ai into the Flex UI for agents through a custom plugin.