I'm having trouble finding an answer for this when I search variants of my question. A use case I'm thinking of is a client makes a GET request to API server A for some data, but in order to provide that data it has to make a request to API server B. For whatever reason the endpoint at B is a POST endpoint (let's say even though it's just fetching data it needs a payload body and so they decided to make it a POST request).
Should the endpoint in API server A be converted to a POST endpoint since it makes a POST request? Or should the fact that the POST endpoint is in a separate API server not concern the design of endpoint A?