Has anyone experience of using the Observability REST API? I am able to obtain raw metrics but struggling to summarise these similarly to the time set or custom time intervals

E.g. can generate API queries via Swagger UI as detailed in the SW guide: SolarWinds Observability REST API

i.e.

But what I'd like to determine how to return metrics for example "trace.service.request_rate" summarized for the preceeding month.