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Azure API Management (APIM) is a fully managed service for publishing, securing, transforming, and monitoring APIs. In a serverless architecture, APIM sits in front of your Azure Functions, Logic Apps, and other backend services, providing a unified API gateway with security policies, rate limiting, caching, and a developer portal.
Without an API gateway, each backend service exposes its own endpoint with its own authentication, rate limiting, and documentation. This leads to:
APIM solves these problems by providing a single entry point that applies consistent policies to all backend APIs.
APIM consists of three main components:
The runtime component that processes API calls:
The administrative interface for configuring APIs:
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