AWS API Gateway
AWS API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale. It acts as a front door for applications to access data, business logic, or functionality from backend services, such as AWS Lambda functions, EC2 instances, or any HTTP endpoint. It handles all the tasks involved in accepting and processing up to hundreds of thousands of concurrent API calls, including traffic management, authorization, monitoring, and API version management.
Developers should use AWS API Gateway when building serverless applications, microservices architectures, or RESTful APIs that require scalability, security, and integration with other AWS services like Lambda, DynamoDB, or Cognito. It is ideal for scenarios where you need to expose backend logic as APIs for web, mobile, or IoT applications, as it simplifies API management, reduces operational overhead, and provides built-in features like throttling, caching, and request/response transformations.