I have shiny-server installed on my server and I want to run multiple plumber APIs from it. I have also R studio server, but with it I can run only 1 at the same time.
Do you know a method to do this?
As far as I know it is not possible to run Plumber API's with shiny-server (and this ticket seems to confirm that.
You can however run multiple Plumber API's using RStudio Connect, and even scale the resources you allocate to your plumber API up or down depending on the need.
Given that RStudio Connect is a commercial product, it may not be a deployment option for your (at this moment). You can, however, still host multiple Plumber API's on your server, but using Docker. The instructions are included in the Plumber documentation.