Architecting Microsoft Azure Solutions: Exam Guide 70-535

API Gateway

The API Gateway acts as a bridge between your app and the outside world. This app can be a custom API, or any other backend application. The API Gateway accepts API calls and routes them to the backend. It provides extra features, such as enhanced security, by adding policies and authentication methods. It can verify API keys, JWT tokens, certificates, and more. You can create transformations without using code modifications, and enforce usage quotas and rate limits. It adds support for caching and throttling, and can log call metadata for analytics purposes.