> What exactly is the problem you're encountering when trying to interact with HTTP APIs?

The problem is that, unlike when using server actions, when using HTTP APIs, there is nothing that automatically generates bindings.

> If you really want to use OpenAPI for whatever reason

No, I don't. But people use OpenAPI to avoid having to handwrite an HTTP client. This is especially relevant if you are developing a public API.

> But it's not like using OpenAPI or GraphQL are the only two options

What are other options?