diff --git a/ph-diver-repo-s3/src/test/java/com/helger/diver/repo/s3/RepoStorageS3Test.java b/ph-diver-repo-s3/src/test/java/com/helger/diver/repo/s3/RepoStorageS3Test.java
index 3cebb9c..2569f93 100644
--- a/ph-diver-repo-s3/src/test/java/com/helger/diver/repo/s3/RepoStorageS3Test.java
+++ b/ph-diver-repo-s3/src/test/java/com/helger/diver/repo/s3/RepoStorageS3Test.java
@@ -107,6 +107,12 @@ public void iterateAllArtifacts (final String sGroupID,
 
                                 public void initForRepo (final IRepoStorageWithToc aRepo)
                                 {}
+
+                                public boolean containsGroupAndArtifact (final String sGroupID,
+                                                                         final String sArtifactID)
+                                {
+                                  return false;
+                                }
                               });
   }
 
diff --git a/ph-diver-repo/src/main/java/com/helger/diver/repo/toc/IRepoTopTocService.java b/ph-diver-repo/src/main/java/com/helger/diver/repo/toc/IRepoTopTocService.java
index 9ad2a3b..58efd64 100644
--- a/ph-diver-repo/src/main/java/com/helger/diver/repo/toc/IRepoTopTocService.java
+++ b/ph-diver-repo/src/main/java/com/helger/diver/repo/toc/IRepoTopTocService.java
@@ -19,6 +19,7 @@
 import java.util.function.Consumer;
 
 import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 
 import com.helger.commons.annotation.Nonempty;
 import com.helger.commons.annotation.ReturnsMutableCopy;
@@ -45,6 +46,8 @@ public interface IRepoTopTocService
    */
   void initForRepo (@Nonnull IRepoStorageWithToc aRepo);
 
+  boolean containsGroupAndArtifact (@Nullable String sGroupID, @Nullable String sArtifactID);
+
   void iterateAllTopLevelGroupNames (@Nonnull Consumer <String> aGroupNameConsumer);
 
   @Nonnull
diff --git a/ph-diver-repo/src/main/java/com/helger/diver/repo/toc/RepoTopTocServiceRepoBasedXML.java b/ph-diver-repo/src/main/java/com/helger/diver/repo/toc/RepoTopTocServiceRepoBasedXML.java
index 4297a26..01366c3 100644
--- a/ph-diver-repo/src/main/java/com/helger/diver/repo/toc/RepoTopTocServiceRepoBasedXML.java
+++ b/ph-diver-repo/src/main/java/com/helger/diver/repo/toc/RepoTopTocServiceRepoBasedXML.java
@@ -20,6 +20,7 @@
 import java.util.function.Consumer;
 
 import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 import javax.annotation.concurrent.GuardedBy;
 import javax.annotation.concurrent.ThreadSafe;
 
@@ -31,6 +32,7 @@
 import com.helger.commons.concurrent.SimpleReadWriteLock;
 import com.helger.commons.error.list.ErrorList;
 import com.helger.commons.state.ESuccess;
+import com.helger.commons.string.StringHelper;
 import com.helger.diver.repo.RepoStorageItem;
 import com.helger.diver.repo.RepoStorageKey;
 import com.helger.diver.repo.toptoc.jaxb.v10.RepoTopTocType;
@@ -132,6 +134,18 @@ private void _checkInited ()
       throw new IllegalStateException ("This service was not properly initialized");
   }
 
+  public boolean containsGroupAndArtifact (@Nullable final String sGroupID, @Nullable final String sArtifactID)
+  {
+    _checkInited ();
+
+    if (StringHelper.hasNoText (sGroupID))
+      return false;
+    if (StringHelper.hasNoText (sArtifactID))
+      return false;
+
+    return m_aRWLock.readLockedBoolean ( () -> m_aTopToc.containsGroupAndArtifact (sGroupID, sArtifactID));
+  }
+
   public void iterateAllTopLevelGroupNames (@Nonnull final Consumer <String> aGroupNameConsumer)
   {
     ValueEnforcer.notNull (aGroupNameConsumer, "GroupNameConsumer");
diff --git a/ph-diver-repo/src/main/java/com/helger/diver/repo/toc/RepoTopTocXML.java b/ph-diver-repo/src/main/java/com/helger/diver/repo/toc/RepoTopTocXML.java
index 944ba6d..1b0a769 100644
--- a/ph-diver-repo/src/main/java/com/helger/diver/repo/toc/RepoTopTocXML.java
+++ b/ph-diver-repo/src/main/java/com/helger/diver/repo/toc/RepoTopTocXML.java
@@ -105,13 +105,6 @@ public int getTopLevelGroupCount ()
     return m_aTopLevelGroups.size ();
   }
 
-  public void iterateAllTopLevelGroupNames (@Nonnull final Consumer <String> aGroupNameConsumer)
-  {
-    ValueEnforcer.notNull (aGroupNameConsumer, "GroupNameConsumer");
-
-    m_aTopLevelGroups.keySet ().forEach (aGroupNameConsumer);
-  }
-
   @Nullable
   private Group _getGroup (@Nonnull @Nonempty final String sGroupID)
   {
@@ -126,6 +119,26 @@ private Group _getGroup (@Nonnull @Nonempty final String sGroupID)
     return aGroup;
   }
 
+  public boolean containsGroupAndArtifact (@Nonnull @Nonempty final String sGroupID,
+                                           @Nonnull @Nonempty final String sArtifactID)
+  {
+    ValueEnforcer.notEmpty (sGroupID, "GroupID");
+    ValueEnforcer.notEmpty (sArtifactID, "ArtifactID");
+
+    final Group aGroup = _getGroup (sGroupID);
+    if (aGroup == null)
+      return false;
+
+    return aGroup.m_aArtifacts.contains (sArtifactID);
+  }
+
+  public void iterateAllTopLevelGroupNames (@Nonnull final Consumer <String> aGroupNameConsumer)
+  {
+    ValueEnforcer.notNull (aGroupNameConsumer, "GroupNameConsumer");
+
+    m_aTopLevelGroups.keySet ().forEach (aGroupNameConsumer);
+  }
+
   private void _recursiveIterateExistingSubGroups (@Nonnull @Nonempty final String sAbsoluteGroupID,
                                                    @Nonnull final Group aCurGroup,
                                                    @Nonnull final IRepoTopTocGroupNameConsumer aGroupNameConsumer,