If you go to the site below, you can get the soundings for a given airport or weather station.
https://rucsoundings.noaa.gov/
The site used to give CAPE and CIN at the top right, but there are no values now. If you load the soundings, also there are no values for CAPE or CIN. But, it you click in the middle of the skew-T chart, iCAPE and iCIN will appear on the right. Nowhere can I find a definition for iCAPE or iCIN. It might be the values for the elevation that was clicked.