(Nango co-founder here) That's a great point. You highlight a key limitation of traditional unified APIs and one of the reasons why we started Nango.

There's a lot of subjectivity that goes into unifying functionalities across APIs. Traditional unified APIs must make these subjective decisions for all their customers in a one-size-fits-all manner.

Nango lets you customize integrations & schemas, so you can make these subjective decisions for yourself. The result is a unified API that truly fits your business use case.

Still, some radically diverging API functionalities cannot be unified, which requires some additional API-specific logic to handle. This can be abstracted in our integration scripts, supported by our tooling, instead of living in your main code-base.