diff --git a/src/sumo/wrapper/sumo_client.py b/src/sumo/wrapper/sumo_client.py
index c8780a7..77272b5 100644
--- a/src/sumo/wrapper/sumo_client.py
+++ b/src/sumo/wrapper/sumo_client.py
@@ -26,6 +26,8 @@
     "SUMOCONNECTIONINFO", "https://api.sumo.equinor.com/well-known"
 )
 
+well_known = None
+
 
 class SumoClient:
     """Authenticate and perform requests to the Sumo API."""
@@ -70,8 +72,9 @@ def __init__(
         """
 
         logger.setLevel(verbosity)
-
-        well_known = httpx.get(WELL_KNOWN).json()
+        global well_known
+        if well_known is None:
+            well_known = httpx.get(WELL_KNOWN).json()
         if env not in well_known["envs"]:
             raise ValueError(f"Invalid environment: {env}")