The article discusses how to create a public-facing API Gateway that federates functionality to multiple private APIs. It focuses on creating an experience layer for a fictitious global company by using TypeScript and the AWS CDK.
It covers topics such as VPC Interface Endpoints, PrivateLink, and Lambda functions. It highlights the benefits of using a federated API, such as exposing certain functionality to multiple clients, and orchestrating calls between domains.
The author suggests versioning and treating domain APIs as products, using IAM/SigV4 over client-credential OAuth flows, and utilizing Secrets Manager for service discovery related config.
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