Since july 2019, myopenhab.org do not allow to expose new items to IFTTT.
So I had to make my own IFTTT gateway to use IFTTT Webhooks in both way (OpenHAB to IFTTT and IFTTT to Openhab).
It’s a very simple project who allow to expose only some Items to IFTTT for security purpose and not all the OpenHAB Rest API.
You can see my project here :
It’s a very easy way to have two String Item (IFTTT_IN / IFTTT_OUT)
I hope it will help some of you.