diff --git a/custom_components/const.py b/custom_components/const.py
new file mode 100644
index 0000000..5bac63d
--- /dev/null
+++ b/custom_components/const.py
@@ -0,0 +1,10 @@
+DOMAIN = "pstryk"
+API_URL = "https://api.pstryk.pl/integrations/"
+API_TIMEOUT = 10
+
+BUY_ENDPOINT = "pricing/?resolution=hour&window_start={start}&window_end={end}"
+SELL_ENDPOINT = "prosumer-pricing/?resolution=hour&window_start={start}&window_end={end}"
+
+ATTR_BUY_PRICE = "buy_price"
+ATTR_SELL_PRICE = "sell_price"
+ATTR_HOURS = "hours"