So, I have been using Griddy for quite a while now. They provide electricity at wholesale prices in Texas. This is a blessing and a curse as the prices are usually below the Texas average, but in cases, August 2019, they can skyrocket. Griddy does provide a real-time price in the app. As far as I know, there is no API that provides these prices. In order to provide this data to myself, I have built myself a utility to do this.
It is definitely a work in progress, but it lives here.