diff --git a/Pilz.Net/Api/Entities/IEntityConverter.cs b/Pilz.Net/Api/Entities/IEntityConverter.cs
new file mode 100644
index 0000000..cadf75f
--- /dev/null
+++ b/Pilz.Net/Api/Entities/IEntityConverter.cs
@@ -0,0 +1,20 @@
+using Pilz.Data;
+
+namespace Pilz.Net.Api.Entities;
+
+public interface IEntityConverter<TEntity, TUpdateMsg>
+    where TEntity : class, IDataObject
+    where TUpdateMsg : ApiMessage
+{
+    IDataObject ConvertToClient(TEntity entityServer, IDataManager manager);
+    ApiResult? UpdateEntity(EntityUpdate<TEntity, TUpdateMsg> entityUpdate, IDataManager manager);
+}
+
+public interface IEntityConverter<TEntity, TParent, TUpdateMsg>
+    where TEntity : class, IDataObject
+    where TParent : class, IDataObject
+    where TUpdateMsg : ApiMessage
+{
+    IDataObject ConvertToClient(TEntity entityServer, IDataManager manager);
+    ApiResult? UpdateEntity(EntityUpdate<TEntity, TParent, TUpdateMsg> entityUpdate, IDataManager manager);
+}
diff --git a/Pilz.Net/Api/Entities/IEntityConverterProvider.cs b/Pilz.Net/Api/Entities/IEntityConverterProvider.cs
new file mode 100644
index 0000000..f95c0cb
--- /dev/null
+++ b/Pilz.Net/Api/Entities/IEntityConverterProvider.cs
@@ -0,0 +1,18 @@
+using Pilz.Data;
+
+namespace Pilz.Net.Api.Entities;
+
+public interface IEntityConverterProvider<TEntity, TUpdateMsg>
+    where TEntity : class, IDataObject
+    where TUpdateMsg : ApiMessage
+{
+    IEntityConverter<TEntity, TUpdateMsg>? GetEntityConverter() => this as IEntityConverter<TEntity, TUpdateMsg>;
+}
+
+public interface IEntityConverterProvider<TEntity, TParent, TUpdateMsg>
+    where TEntity : class, IDataObject
+    where TParent : class, IDataObject
+    where TUpdateMsg : ApiMessage
+{
+    IEntityConverter<TEntity, TParent, TUpdateMsg>? GetEntityConverter() => this as IEntityConverter<TEntity, TParent, TUpdateMsg>;
+}