Yep!
In Postman, you can write JavaScript in "Pre-request Script."
So, I'm accessing the Simple Analytics API and constructing HTML tables with API data.
Then... pm.globals.set("body_html", theCompleteHTML);
body_html is sent to Shopify, and then users can see our visitors/devices/browsers as plain HTML instead of heavy JavaScript and API calls for every pageload.
Use monitors to schedule the run once per day to update the API data on Shopify.