diff --git a/docs/_config.yml b/docs/_config.yml
index 3dd41fa..62e3808 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -18,7 +18,7 @@ sphinx:
   config:
     html_theme: sphinx_book_theme
     html_theme_options:
-      repository_url: https://github.com/PolicyEngine/micro
+      repository_url: https://github.com/PolicyEngine/microplex
       use_repository_button: true
       use_issues_button: true
     autodoc_member_order: bysource
diff --git a/scripts/load_pe_targets.py b/scripts/load_pe_targets.py
index 1eca42d..6a1ad04 100644
--- a/scripts/load_pe_targets.py
+++ b/scripts/load_pe_targets.py
@@ -12,8 +12,10 @@
 from typing import List, Dict, Any, Tuple
 from dataclasses import dataclass, field
 
-# Supabase connection
-SUPABASE_URL = "https://nsupqhfchdtqclomlrgs.supabase.co"
+# Supabase connection.
+SUPABASE_URL = os.environ.get("POLICYENGINE_SUPABASE_URL") or os.environ.get(
+    "SUPABASE_URL"
+)
 SUPABASE_KEY = os.environ.get("POLICYENGINE_SUPABASE_SERVICE_KEY")
 
 PE_BASE = "https://raw.githubusercontent.com/PolicyEngine/policyengine-us-data/main/policyengine_us_data/storage/calibration_targets"
@@ -38,6 +40,11 @@ class BatchSupabaseClient:
     """Supabase client optimized for batch operations."""
 
     def __init__(self, url: str, key: str, schema: str = "microplex"):
+        if not url:
+            raise ValueError(
+                "POLICYENGINE_SUPABASE_URL must be set before loading "
+                "PolicyEngine calibration targets."
+            )
         if not key:
             raise ValueError(
                 "POLICYENGINE_SUPABASE_SERVICE_KEY must be set before loading "
diff --git a/scripts/run_supabase_calibration.py b/scripts/run_supabase_calibration.py
index e757303..47e6085 100644
--- a/scripts/run_supabase_calibration.py
+++ b/scripts/run_supabase_calibration.py
@@ -105,11 +105,15 @@ class SupabaseCalibrationLoader:
     }
 
     def __init__(self):
-        self.url = os.environ.get(
-            "SUPABASE_URL",
-            "https://nsupqhfchdtqclomlrgs.supabase.co"
+        self.url = os.environ.get("POLICYENGINE_SUPABASE_URL") or os.environ.get(
+            "SUPABASE_URL"
         )
         self.key = os.environ.get("POLICYENGINE_SUPABASE_SERVICE_KEY")
+        if not self.url:
+            raise ValueError(
+                "POLICYENGINE_SUPABASE_URL must be set before running "
+                "Supabase calibration."
+            )
         if not self.key:
             raise ValueError(
                 "POLICYENGINE_SUPABASE_SERVICE_KEY must be set before running "
diff --git a/tests/test_supabase_client.py b/tests/test_supabase_client.py
index b7af10e..6d007b3 100644
--- a/tests/test_supabase_client.py
+++ b/tests/test_supabase_client.py
@@ -235,7 +235,9 @@ class TestBatchIntegration:
     @pytest.fixture
     def live_client(self):
         """Create a client connected to real Supabase."""
-        url = os.environ.get("SUPABASE_URL")
+        url = os.environ.get("POLICYENGINE_SUPABASE_URL") or os.environ.get(
+            "SUPABASE_URL"
+        )
         key = os.environ.get("POLICYENGINE_SUPABASE_SERVICE_KEY")
         if not url or not key:
             pytest.skip("No Supabase credentials - skipping integration test")