The text provides a comprehensive guide to building a serverless Generative AI (GenAI) API using FastAPI, AWS services, and CircleCI, allowing developers to integrate advanced AI models without managing infrastructure. The tutorial outlines steps for setting up a scalable and cost-effective API by deploying FastAPI on AWS Lambda with AWS API Gateway, creating a fully managed, pay-per-use architecture. It emphasizes the importance of automating the development and deployment process using a Continuous Integration and Continuous Deployment (CI/CD) pipeline with CircleCI, integrated with GitHub for continuous delivery. The document details necessary prerequisites, including an AWS account and basic knowledge of RESTful APIs and GenAI models, and provides instructions for installing dependencies, setting up FastAPI endpoints, and securely managing environment variables and API keys with AWS Secrets Manager. It also covers testing and validating the API with pytest and unittest, deploying the application using AWS SAM, and automating the deployment process with CircleCI, ensuring efficient and reliable application delivery that scales with demand.