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Microservice on-boarding on API Gateway

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HI All,

My current API assignment requires to expose the backend which are around 100 microservices through API gateway.

I have come with around a list of 20 API proxies which includes experience APIs as well to expose the backend through gateway.

During one of my review, a comment was raised that I also need to on-board all the microservices on gateway (create pass-through wrapper proxies which will not be exposed to outside world). And my client facing APIs will call these wrapper proxies to interact with microservices rather than directly calling them.

I am not aware of this pattern and do not see any potential benefits. Though I was also told that many customers are using this pattern.

Any comments/ thoughts and reasoning behind this approach?

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