diff --git a/DbFirst.Infrastructure/Repositories/CatalogRepository.cs b/DbFirst.Infrastructure/Repositories/CatalogRepository.cs
index 0227349..f37ed80 100644
--- a/DbFirst.Infrastructure/Repositories/CatalogRepository.cs
+++ b/DbFirst.Infrastructure/Repositories/CatalogRepository.cs
@@ -27,9 +27,33 @@ public class CatalogRepository : ICatalogRepository
 
     public async Task<VwmyCatalog> InsertAsync(VwmyCatalog catalog, CancellationToken cancellationToken = default)
     {
-        // Platzhalter: Insert-Prozedur folgt.
-        // TODO: Replace with dedicated insert stored procedure invocation.
-        throw new NotImplementedException("Insert stored procedure not implemented yet.");
+        var guidParam = new SqlParameter("@GUID", SqlDbType.Int)
+        {
+            Direction = ParameterDirection.Output
+        };
+
+        var catTitleParam = new SqlParameter("@CAT_TITLE", catalog.CatTitle);
+        var catStringParam = new SqlParameter("@CAT_STRING", catalog.CatString);
+        var addedWhoParam = new SqlParameter("@ADDED_WHO", (object?)catalog.AddedWho ?? DBNull.Value);
+
+        await _db.Database.ExecuteSqlRawAsync(
+            "EXEC dbo.PRTBMY_CATALOG_INSERT @CAT_TITLE, @CAT_STRING, @ADDED_WHO, @GUID OUTPUT",
+            parameters: new[] { catTitleParam, catStringParam, addedWhoParam, guidParam },
+            cancellationToken: cancellationToken);
+
+        if (guidParam.Value == DBNull.Value)
+        {
+            throw new InvalidOperationException("Failed to insert catalog via stored procedure.");
+        }
+
+        var guid = (int)guidParam.Value;
+        var created = await _db.VwmyCatalogs.AsNoTracking().FirstOrDefaultAsync(x => x.Guid == guid, cancellationToken);
+        if (created == null)
+        {
+            throw new InvalidOperationException("Inserted catalog could not be loaded from view.");
+        }
+
+        return created;
     }
 
     public async Task<VwmyCatalog?> UpdateAsync(int id, VwmyCatalog catalog, CancellationToken cancellationToken = default)