Is it possible to integrate my harmony hub/remote with webcore? In particular i want to use ifttt to increase and decrease the volume
Short answer no… official ST/Harmony/IFTTT integration only allows you to start and end activities, not make individual Harmony commands.
Long answer, maybe, but it’s not easy!!
Some AVRs have network capabilities and have custom DTHs developed by community members. In my case, I have 2 Yamaha AVRs that I was able to create Virtual Switches to control the volume.
Alexa also has the ability to control volume.
The integration linked above is pretty awesome as well.
In the long run, I find myself just using the remote!
If you’re willing and able to set up a Raspberry Pi or similar to act as a go-between from SmartThings to your Harmony Hub you can do this.
If you have Alexa the Harmony skill will do this natively now.