Web API to get Real-time electricity price for jsp project

Iam working on a jsp project where i need to show

 Real-time electricity price ($/MWh, 1 tag)

 Forecast electricity price ($/MWh, 1 tag)

 Hourly forecast current through 10+ days into the future

 Previous day’s forecast electricity price for current hour ($/MWh, 1 tag)

 Capacity tag management forecast (hour of day, duration of period)

So anyone can please suggest API to fulfill this requirement.