Is there a document that goes over the structure of the Gooddata API output for all calls? Metrics, Visualizations etc?

Hi Doug, I think the best resource for this would be our API Reference. It contains a list of all supported API calls and endpoints, including example Payloads and Responses, and possible parameters. There’s a section called Analytical Objects which contains all the details about the calls involving metrics, visualizations, dashboards, and other such objects.