API Gateway Pattern and FastAPI

Saverio Mazza
8 min readSep 29, 2023

As modern applications grow in size and complexity, microservices have become a popular architectural style. They offer modular components that can scale independently, but this advantage comes at the cost of complex endpoint management. Enter the API Gateway pattern — a single, unified interface that handles all client requests and directs them to the appropriate microservices. In this article, we’ll delve into implementing this pattern using FastAPI in Python.

The API Gateway Pattern

The API Gateway pattern serves as a single entry point that routes requests to appropriate microservices. It can handle additional responsibilities such as authentication, logging, and caching. Essentially, it acts as a pseudo-reverse proxy, directing incoming requests based on certain criteria.

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