diff --git a/custom_components/pstryk/const.py b/custom_components/pstryk/const.py
index 3e456dd..4c57330 100644
--- a/custom_components/pstryk/const.py
+++ b/custom_components/pstryk/const.py
@@ -7,6 +7,10 @@ API_TIMEOUT = 60
 BUY_ENDPOINT = "pricing/?resolution=hour&window_start={start}&window_end={end}"
 SELL_ENDPOINT = "prosumer-pricing/?resolution=hour&window_start={start}&window_end={end}"
 
+# Energy cost and usage endpoints
+ENERGY_COST_ENDPOINT = "meter-data/energy-cost/?resolution={resolution}&window_start={start}&window_end={end}&for_tz=Europe/Warsaw"
+ENERGY_USAGE_ENDPOINT = "meter-data/energy-usage/?resolution={resolution}&window_start={start}&window_end={end}&for_tz=Europe/Warsaw"
+
 ATTR_BUY_PRICE = "buy_price"
 ATTR_SELL_PRICE = "sell_price"
 ATTR_HOURS = "hours"