This isn't always true, but one nice thing about using an HTTP API directly is the responses are usually documented well enough that creating mocks for testing

This isn't always true, but one nice thing about using an HTTP API directly is the responses are usually documented well enough that creating mocks for testing can be easier than the SDK. Additionally, I find working in an HTTP tool like Postman or Insomnium easier than in a full dev environment when I'm in the exploratory phase.