Hello,
Awattar is an electricity provider in Europe. This provides the electricity price via API. Unfortunately, I can’t program something like this myself. But it would be great if there was a way to display the current electricity price in HA. You could then also control devices, if the electricity price is cheap. Homepage is aWATTar Deutschland - Energy in Sync with Nature
EDIT: I found a solution: GitHub - mampfes/ha_epex_spot: Adds EPEX Spot data to Home Assistant.