diff --git a/java/lance-namespace-glue/src/main/java/org/lance/namespace/glue/GlueNamespace.java b/java/lance-namespace-glue/src/main/java/org/lance/namespace/glue/GlueNamespace.java
index 66a7cc8..e166b6a 100644
--- a/java/lance-namespace-glue/src/main/java/org/lance/namespace/glue/GlueNamespace.java
+++ b/java/lance-namespace-glue/src/main/java/org/lance/namespace/glue/GlueNamespace.java
@@ -39,6 +39,7 @@
 import org.lance.namespace.model.ListTablesRequest;
 import org.lance.namespace.model.ListTablesResponse;
 import org.lance.namespace.model.TableExistsRequest;
+import org.lance.namespace.model.TableExistsResponse;
 import org.lance.namespace.util.LanceTableUtil;
 
 import com.google.common.annotations.VisibleForTesting;
@@ -269,13 +270,14 @@ public DescribeTableResponse describeTable(DescribeTableRequest request) {
   }
 
   @Override
-  public void tableExists(TableExistsRequest request) {
+  public TableExistsResponse tableExists(TableExistsRequest request) {
     validateTableId(request.getId());
     String namespaceName = request.getId().get(0);
     String tableName = request.getId().get(1);
 
     Table table = getGlueTable(namespaceName, tableName);
     ensureLanceTable(table);
+    return new TableExistsResponse();
   }
 
   @Override
diff --git a/java/lance-namespace-hive2/src/main/java/org/lance/namespace/hive2/Hive2Namespace.java b/java/lance-namespace-hive2/src/main/java/org/lance/namespace/hive2/Hive2Namespace.java
index 19dea63..da86c65 100644
--- a/java/lance-namespace-hive2/src/main/java/org/lance/namespace/hive2/Hive2Namespace.java
+++ b/java/lance-namespace-hive2/src/main/java/org/lance/namespace/hive2/Hive2Namespace.java
@@ -41,7 +41,9 @@
 import org.lance.namespace.model.ListTablesRequest;
 import org.lance.namespace.model.ListTablesResponse;
 import org.lance.namespace.model.NamespaceExistsRequest;
+import org.lance.namespace.model.NamespaceExistsResponse;
 import org.lance.namespace.model.TableExistsRequest;
+import org.lance.namespace.model.TableExistsResponse;
 import org.lance.namespace.util.LanceTableUtil;
 
 import com.google.common.collect.Lists;
@@ -147,7 +149,7 @@ public CreateNamespaceResponse createNamespace(CreateNamespaceRequest request) {
   }
 
   @Override
-  public void namespaceExists(NamespaceExistsRequest request) {
+  public NamespaceExistsResponse namespaceExists(NamespaceExistsRequest request) {
     ObjectIdentifier id = ObjectIdentifier.of(request.getId());
 
     ValidationUtil.checkArgument(
@@ -162,6 +164,8 @@ public void namespaceExists(NamespaceExistsRequest request) {
           HiveMetaStoreError.getType(),
           id.stringStyleId());
     }
+
+    return new NamespaceExistsResponse();
   }
 
   @Override
@@ -247,7 +251,7 @@ public ListTablesResponse listTables(ListTablesRequest request) {
   }
 
   @Override
-  public void tableExists(TableExistsRequest request) {
+  public TableExistsResponse tableExists(TableExistsRequest request) {
     ObjectIdentifier tableId = ObjectIdentifier.of(request.getId());
 
     ValidationUtil.checkArgument(
@@ -266,6 +270,7 @@ public void tableExists(TableExistsRequest request) {
     }
 
     Hive2Util.validateLanceTable(hmsTable.get());
+    return new TableExistsResponse();
   }
 
   @Override
diff --git a/java/lance-namespace-hive3/src/main/java/org/lance/namespace/hive3/Hive3Namespace.java b/java/lance-namespace-hive3/src/main/java/org/lance/namespace/hive3/Hive3Namespace.java
index a22d9bf..d1c52c9 100644
--- a/java/lance-namespace-hive3/src/main/java/org/lance/namespace/hive3/Hive3Namespace.java
+++ b/java/lance-namespace-hive3/src/main/java/org/lance/namespace/hive3/Hive3Namespace.java
@@ -42,7 +42,9 @@
 import org.lance.namespace.model.ListTablesRequest;
 import org.lance.namespace.model.ListTablesResponse;
 import org.lance.namespace.model.NamespaceExistsRequest;
+import org.lance.namespace.model.NamespaceExistsResponse;
 import org.lance.namespace.model.TableExistsRequest;
+import org.lance.namespace.model.TableExistsResponse;
 import org.lance.namespace.util.LanceTableUtil;
 
 import com.google.common.collect.Lists;
@@ -196,7 +198,7 @@ public DescribeNamespaceResponse describeNamespace(DescribeNamespaceRequest requ
   }
 
   @Override
-  public void namespaceExists(NamespaceExistsRequest request) {
+  public NamespaceExistsResponse namespaceExists(NamespaceExistsRequest request) {
     ObjectIdentifier id = ObjectIdentifier.of(request.getId());
 
     ValidationUtil.checkArgument(
@@ -220,6 +222,8 @@ public void namespaceExists(NamespaceExistsRequest request) {
             String.format("Namespace does not exist: %s", id.stringStyleId()));
       }
     }
+
+    return new NamespaceExistsResponse();
   }
 
   @Override
@@ -243,7 +247,7 @@ public DropNamespaceResponse dropNamespace(DropNamespaceRequest request) {
   }
 
   @Override
-  public void tableExists(TableExistsRequest request) {
+  public TableExistsResponse tableExists(TableExistsRequest request) {
     ObjectIdentifier tableId = ObjectIdentifier.of(request.getId());
 
     ValidationUtil.checkArgument(
@@ -261,6 +265,7 @@ public void tableExists(TableExistsRequest request) {
     }
 
     Hive3Util.validateLanceTable(hmsTable.get());
+    return new TableExistsResponse();
   }
 
   @Override
diff --git a/java/lance-namespace-iceberg/src/main/java/org/lance/namespace/iceberg/IcebergNamespace.java b/java/lance-namespace-iceberg/src/main/java/org/lance/namespace/iceberg/IcebergNamespace.java
index 33ade28..08a35f5 100644
--- a/java/lance-namespace-iceberg/src/main/java/org/lance/namespace/iceberg/IcebergNamespace.java
+++ b/java/lance-namespace-iceberg/src/main/java/org/lance/namespace/iceberg/IcebergNamespace.java
@@ -37,7 +37,9 @@
 import org.lance.namespace.model.ListTablesRequest;
 import org.lance.namespace.model.ListTablesResponse;
 import org.lance.namespace.model.NamespaceExistsRequest;
+import org.lance.namespace.model.NamespaceExistsResponse;
 import org.lance.namespace.model.TableExistsRequest;
+import org.lance.namespace.model.TableExistsResponse;
 import org.lance.namespace.rest.RestClient;
 import org.lance.namespace.rest.RestClientException;
 import org.lance.namespace.util.LanceTableUtil;
@@ -265,8 +267,9 @@ public DescribeNamespaceResponse describeNamespace(DescribeNamespaceRequest requ
   }
 
   @Override
-  public void namespaceExists(NamespaceExistsRequest request) {
+  public NamespaceExistsResponse namespaceExists(NamespaceExistsRequest request) {
     describeNamespace(new DescribeNamespaceRequest().id(request.getId()));
+    return new NamespaceExistsResponse();
   }
 
   @Override
@@ -457,8 +460,9 @@ public DescribeTableResponse describeTable(DescribeTableRequest request) {
   }
 
   @Override
-  public void tableExists(TableExistsRequest request) {
+  public TableExistsResponse tableExists(TableExistsRequest request) {
     describeTable(new DescribeTableRequest().id(request.getId()));
+    return new TableExistsResponse();
   }
 
   @Override
diff --git a/java/lance-namespace-polaris/src/main/java/org/lance/namespace/polaris/PolarisNamespace.java b/java/lance-namespace-polaris/src/main/java/org/lance/namespace/polaris/PolarisNamespace.java
index b359145..e86ee91 100644
--- a/java/lance-namespace-polaris/src/main/java/org/lance/namespace/polaris/PolarisNamespace.java
+++ b/java/lance-namespace-polaris/src/main/java/org/lance/namespace/polaris/PolarisNamespace.java
@@ -37,7 +37,9 @@
 import org.lance.namespace.model.ListTablesRequest;
 import org.lance.namespace.model.ListTablesResponse;
 import org.lance.namespace.model.NamespaceExistsRequest;
+import org.lance.namespace.model.NamespaceExistsResponse;
 import org.lance.namespace.model.TableExistsRequest;
+import org.lance.namespace.model.TableExistsResponse;
 import org.lance.namespace.rest.RestClient;
 import org.lance.namespace.rest.RestClientException;
 import org.lance.namespace.util.LanceTableUtil;
@@ -223,7 +225,7 @@ public DropNamespaceResponse dropNamespace(DropNamespaceRequest request) {
   }
 
   @Override
-  public void namespaceExists(NamespaceExistsRequest request) {
+  public NamespaceExistsResponse namespaceExists(NamespaceExistsRequest request) {
     ObjectIdentifier namespaceId = ObjectIdentifier.of(request.getId());
     ValidationUtil.checkArgument(
         namespaceId.levels() >= 2, "Namespace must have at least catalog and namespace levels");
@@ -236,6 +238,7 @@ public void namespaceExists(NamespaceExistsRequest request) {
 
       restClient.get(
           "/v1/" + catalog + "/namespaces/" + namespacePath, PolarisModels.NamespaceResponse.class);
+      return new NamespaceExistsResponse();
     } catch (RestClientException e) {
       if (e.isNotFound()) {
         throw new NamespaceNotFoundException("Namespace not found: " + namespaceId.stringStyleId());
@@ -245,7 +248,7 @@ public void namespaceExists(NamespaceExistsRequest request) {
   }
 
   @Override
-  public void tableExists(TableExistsRequest request) {
+  public TableExistsResponse tableExists(TableExistsRequest request) {
     ObjectIdentifier tableId = ObjectIdentifier.of(request.getId());
     ValidationUtil.checkArgument(
         tableId.levels() >= 3, "Table identifier must have catalog, namespace, and table name");
@@ -265,6 +268,7 @@ public void tableExists(TableExistsRequest request) {
               + "/generic-tables/"
               + tableName,
           PolarisModels.LoadGenericTableResponse.class);
+      return new TableExistsResponse();
     } catch (RestClientException e) {
       if (e.isNotFound()) {
         throw new TableNotFoundException("Table not found: " + tableId.stringStyleId());
diff --git a/java/lance-namespace-unity/src/main/java/org/lance/namespace/unity/UnityNamespace.java b/java/lance-namespace-unity/src/main/java/org/lance/namespace/unity/UnityNamespace.java
index 1dd9cb3..92511e2 100644
--- a/java/lance-namespace-unity/src/main/java/org/lance/namespace/unity/UnityNamespace.java
+++ b/java/lance-namespace-unity/src/main/java/org/lance/namespace/unity/UnityNamespace.java
@@ -37,7 +37,9 @@
 import org.lance.namespace.model.ListTablesRequest;
 import org.lance.namespace.model.ListTablesResponse;
 import org.lance.namespace.model.NamespaceExistsRequest;
+import org.lance.namespace.model.NamespaceExistsResponse;
 import org.lance.namespace.model.TableExistsRequest;
+import org.lance.namespace.model.TableExistsResponse;
 import org.lance.namespace.rest.RestClient;
 import org.lance.namespace.rest.RestClientException;
 import org.lance.namespace.util.LanceTableUtil;
@@ -223,8 +225,9 @@ public DescribeNamespaceResponse describeNamespace(DescribeNamespaceRequest requ
   }
 
   @Override
-  public void namespaceExists(NamespaceExistsRequest request) {
+  public NamespaceExistsResponse namespaceExists(NamespaceExistsRequest request) {
     describeNamespace(new DescribeNamespaceRequest().id(request.getId()));
+    return new NamespaceExistsResponse();
   }
 
   @Override
@@ -419,8 +422,9 @@ public DescribeTableResponse describeTable(DescribeTableRequest request) {
   }
 
   @Override
-  public void tableExists(TableExistsRequest request) {
+  public TableExistsResponse tableExists(TableExistsRequest request) {
     describeTable(new DescribeTableRequest().id(request.getId()));
+    return new TableExistsResponse();
   }
 
   @Override
diff --git a/java/pom.xml b/java/pom.xml
index 489769d..17d30d5 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -58,7 +58,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
         <lance-core.version>7.0.0</lance-core.version>
-        <lance-namespace.version>0.7.7</lance-namespace.version>
+        <lance-namespace.version>0.13.0</lance-namespace.version>
         <arrow.version>18.3.0</arrow.version>
         <netty.version>4.1.118.Final</netty.version>
         <junit-version>5.8.2</junit-version>