diff --git a/src/google/adk/integrations/api_registry/api_registry.py b/src/google/adk/integrations/api_registry/api_registry.py
index 966ad68b7d..f40062948a 100644
--- a/src/google/adk/integrations/api_registry/api_registry.py
+++ b/src/google/adk/integrations/api_registry/api_registry.py
@@ -61,7 +61,10 @@ def __init__(
       page_token = None
       with httpx.Client() as client:
         while True:
-          params = {}
+          params = {
+            # Include all the apis including disabled ones. API registry no longer supports enabling APIs.
+            "filter": "enabled=false"
+          }
           if page_token:
             params["pageToken"] = page_token
 
diff --git a/tests/unittests/integrations/api_registry/test_api_registry.py b/tests/unittests/integrations/api_registry/test_api_registry.py
index 7edaee9fec..203bf68064 100644
--- a/tests/unittests/integrations/api_registry/test_api_registry.py
+++ b/tests/unittests/integrations/api_registry/test_api_registry.py
@@ -91,7 +91,7 @@ def test_init_success(self, MockHttpClient):
             "Authorization": "Bearer mock_token",
             "Content-Type": "application/json",
         },
-        params={},
+        params={"filter": "enabled=false"},
     )
 
   @patch("httpx.Client", autospec=True)
@@ -120,7 +120,7 @@ def test_init_with_quota_project_id_success(self, MockHttpClient):
             "Content-Type": "application/json",
             "x-goog-user-project": "quota-project",
         },
-        params={},
+        params={"filter": "enabled=false"},
     )
 
   @patch("httpx.Client", autospec=True)
@@ -176,7 +176,7 @@ def test_init_with_pagination_success(self, MockHttpClient):
             "Authorization": "Bearer mock_token",
             "Content-Type": "application/json",
         },
-        params={},
+        params={"filter": "enabled=false"},
     )
     mock_client_instance.get.assert_called_with(
         f"https://cloudapiregistry.googleapis.com/v1beta/projects/{self.project_id}/locations/{self.location}/mcpServers",
@@ -184,7 +184,7 @@ def test_init_with_pagination_success(self, MockHttpClient):
             "Authorization": "Bearer mock_token",
             "Content-Type": "application/json",
         },
-        params={"pageToken": "next_page_token"},
+        params={"filter": "enabled=false", "pageToken": "next_page_token"},
     )
 
   @patch("httpx.Client", autospec=True)