I tried writing a scraper for Prometheus using the json-rpc API yesterday, in both Python and then in Java using standard http client libs and found with both that the API does NOT produce a consumable output.  In Java, posting with the specified request ( {"id":1, "method":"getstat"} the post to the API port throws an http.ProtocolException "The server failed to respond with a valid HTTP response".

I'd like to use this more elegant json output from a POST rather than scraping through the html on a GET.

Clicking on bminer.exe directly it runs ... so I copied over the new mine.bat file in the v.4 distribution and starting with the original var settings, it ran until I got all the way through to config'ing the API ... and it runs.   Sorry, I must have fat-fingered something in the original .bat, for all is good now.

BTW, love the graphs in the new API!

I've had success with version 3.0, running at 2900 H/s on 6x GTX 1070Ti's, but the version 4.0 code silently fails and immediately exits without any output.

I am running:  Windows 10, Nvidia driver ver 23.21.13.8813 (10/27/2017).

Not sure what, if any other info you'd like, but I'd be happy to assist further.