> But when things don't work as I expect, it's far more efficient to be able to view the code on both sides, rather than only on my own side and try to guess what the other side is doing.

Are you able to view the source code of your platform vendor? Everyone is at some level dependent on Black box APIs.

If you can document where with certain input you don’t get the expected output, you reach out to the team that is responsible for it whether internally or externally and they either explain it or they fix it.

This is the API service I’ve been working with over the past five+ years - three actually working at AWS (Professional Services).

https://boto3.amazonaws.com/v1/documentation/api/latest/inde...

I found a bug in one relatively new API that a service team released, I reached out to the team with a documented scenario and they fixed it.

Other times they explained what I was doing wrong. That’s what any large organization does.

I’ve worked with other vendors and internal teams plenty of times over the years.