Three-tier serverless API architecture for a dog breeds lookup service built entirely on AWS managed services. User requests flow from S3-hosted static frontend through API Gateway to Lambda functions, which query DynamoDB for breed data and return results. This pattern eliminates server management, scales automatically with demand, and minimizes operational overhead—ideal for read-heavy APIs with unpredictable traffic. Fork this diagram on Diagrams.so to customize endpoints, add authentication, or extend with additional Lambda functions and data sources.