diff --git a/src/Infrastructure/BotSharp.Abstraction/Conversations/Models/Conversation.cs b/src/Infrastructure/BotSharp.Abstraction/Conversations/Models/Conversation.cs
index c99a819b1..5613c088f 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Conversations/Models/Conversation.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Conversations/Models/Conversation.cs
@@ -37,6 +37,7 @@ public class DialogElement
     public string? SecondaryContent { get; set; }
     public string? RichContent { get; set; }
     public string? SecondaryRichContent { get; set; }
+    public string? Payload { get; set; }
 
     public DialogElement()
     {
@@ -44,13 +45,14 @@ public DialogElement()
     }
 
     public DialogElement(DialogMetaData meta, string content, string? richContent = null,
-        string? secondaryContent = null, string? secondaryRichContent = null)
+        string? secondaryContent = null, string? secondaryRichContent = null, string? payload = null)
     {
         MetaData = meta;
         Content = content;
         RichContent = richContent;
         SecondaryContent = secondaryContent;
         SecondaryRichContent = secondaryRichContent;
+        Payload = payload;
     }
 
     public override string ToString()
diff --git a/src/Infrastructure/BotSharp.Abstraction/Conversations/Models/RoleDialogModel.cs b/src/Infrastructure/BotSharp.Abstraction/Conversations/Models/RoleDialogModel.cs
index c3a6403af..e019eae44 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Conversations/Models/RoleDialogModel.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Conversations/Models/RoleDialogModel.cs
@@ -28,6 +28,10 @@ public class RoleDialogModel : ITrackableMessage
 
     public string? SecondaryContent { get; set; }
 
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    [JsonPropertyName("payload")]
+    public string? Payload { get; set; }
+
     /// <summary>
     /// Indicator message used to provide UI feedback for function execution
     /// </summary>
diff --git a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationStorage.cs b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationStorage.cs
index 4ab447b8b..9bb8f103f 100644
--- a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationStorage.cs
+++ b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationStorage.cs
@@ -50,7 +50,13 @@ public void Append(string conversationId, RoleDialogModel dialog)
             {
                 return;
             }
-            dialogElements.Add(new DialogElement(meta, content, dialog.SecondaryContent));
+            dialogElements.Add(new DialogElement
+            {
+                MetaData = meta,
+                Content = dialog.Content,
+                SecondaryContent = dialog.SecondaryContent,
+                Payload = dialog.Payload
+            });
         }
         else
         {
@@ -72,7 +78,15 @@ public void Append(string conversationId, RoleDialogModel dialog)
 
             var richContent = dialog.RichContent != null ? JsonSerializer.Serialize(dialog.RichContent, _options.JsonSerializerOptions) : null;
             var secondaryRichContent = dialog.SecondaryRichContent != null ? JsonSerializer.Serialize(dialog.SecondaryRichContent, _options.JsonSerializerOptions) : null;
-            dialogElements.Add(new DialogElement(meta, content, richContent, dialog.SecondaryContent, secondaryRichContent));
+            dialogElements.Add(new DialogElement
+            {
+                MetaData = meta,
+                Content = dialog.Content,
+                SecondaryContent = dialog.SecondaryContent,
+                RichContent = richContent,
+                SecondaryRichContent = secondaryRichContent,
+                Payload = dialog.Payload
+            });
         }
 
         db.AppendConversationDialogs(conversationId, dialogElements);
@@ -90,6 +104,7 @@ public List<RoleDialogModel> GetDialogs(string conversationId)
             var meta = dialog.MetaData;
             var content = dialog.Content;
             var secondaryContent = dialog.SecondaryContent;
+            var payload = dialog.Payload;
             var role = meta.Role;
             var currentAgentId = meta.AgentId;
             var messageId = meta.MessageId;
@@ -111,6 +126,7 @@ public List<RoleDialogModel> GetDialogs(string conversationId)
                 RichContent = richContent,
                 SecondaryContent = secondaryContent,
                 SecondaryRichContent = secondaryRichContent,
+                Payload = payload
             };
             results.Add(record);
 
diff --git a/src/Infrastructure/BotSharp.Core/Repository/FileRepository/FileRepository.Conversation.cs b/src/Infrastructure/BotSharp.Core/Repository/FileRepository/FileRepository.Conversation.cs
index d9400e478..6708f49a8 100644
--- a/src/Infrastructure/BotSharp.Core/Repository/FileRepository/FileRepository.Conversation.cs
+++ b/src/Infrastructure/BotSharp.Core/Repository/FileRepository/FileRepository.Conversation.cs
@@ -529,6 +529,7 @@ private List<DialogElement> CollectDialogElements(string dialogDir)
                     var trimmedContent = content.Substring(4);
                     var secondaryContent = rawDialogs[i + 4];
                     var trimmedSecondaryContent = string.IsNullOrEmpty(secondaryContent) ? null : secondaryContent.Substring(4);
+                    var payload = blocks.Count() > 6 ? blocks[6] : null;
 
                     var meta = new DialogMetaData
                     {
@@ -540,9 +541,17 @@ private List<DialogElement> CollectDialogElements(string dialogDir)
                         CreateTime = DateTime.Parse(blocks[0])
                     };
 
-                    var richContent = DecodeRichContent(rawDialogs[i + 1]);
-                    var secondaryRichContent = DecodeRichContent(rawDialogs[i + 3]);
-                    dialogs.Add(new DialogElement(meta, trimmedContent, richContent, trimmedSecondaryContent, secondaryRichContent));
+                    var richContent = DecodeText(rawDialogs[i + 1]);
+                    var secondaryRichContent = DecodeText(rawDialogs[i + 3]);
+                    dialogs.Add(new DialogElement
+                    {
+                        MetaData = meta,
+                        Content = trimmedContent,
+                        SecondaryContent = trimmedSecondaryContent,
+                        RichContent = richContent,
+                        SecondaryRichContent = secondaryRichContent,
+                        Payload = payload
+                    });
                 }
             }
             return dialogs;
@@ -557,9 +566,10 @@ private List<string> ParseDialogElements(List<DialogElement> dialogs)
             {
                 var meta = element.MetaData;
                 var createTime = meta.CreateTime.ToString("MM/dd/yyyy hh:mm:ss.ffffff tt", CultureInfo.InvariantCulture);
-                var encodedRichContent = EncodeRichContent(element.RichContent);
-                var encodedSecondaryRichContent = EncodeRichContent(element.SecondaryRichContent);
-                var metaStr = $"{createTime}|{meta.Role}|{meta.AgentId}|{meta.MessageId}|{meta.SenderId}|{meta.FunctionName}";
+                var encodedRichContent = EncodeText(element.RichContent);
+                var encodedSecondaryRichContent = EncodeText(element.SecondaryRichContent);
+                var payload = element.Payload;
+                var metaStr = $"{createTime}|{meta.Role}|{meta.AgentId}|{meta.MessageId}|{meta.SenderId}|{meta.FunctionName}|{payload}";
                 dialogTexts.Add(metaStr);
 
                 dialogTexts.Add(encodedRichContent);
@@ -715,20 +725,20 @@ private bool SaveTruncatedBreakpoints(string breakpointDir, List<ConversationBre
             return true;
         }
 
-        private string? EncodeRichContent(string? content)
+        private string? EncodeText(string? text)
         {
-            if (string.IsNullOrEmpty(content)) return content;
+            if (string.IsNullOrEmpty(text)) return text;
 
-            var bytes = Encoding.UTF8.GetBytes(content);
+            var bytes = Encoding.UTF8.GetBytes(text);
             var encoded = Convert.ToBase64String(bytes);
             return encoded;
         }
 
-        private string? DecodeRichContent(string? content)
+        private string? DecodeText(string? text)
         {
-            if (string.IsNullOrEmpty(content)) return content;
+            if (string.IsNullOrEmpty(text)) return text;
 
-            var decoded = Convert.FromBase64String(content);
+            var decoded = Convert.FromBase64String(text);
             var origin = Encoding.UTF8.GetString(decoded);
             return origin;
         }
diff --git a/src/Infrastructure/BotSharp.OpenAPI/Controllers/ConversationController.cs b/src/Infrastructure/BotSharp.OpenAPI/Controllers/ConversationController.cs
index c85b8e436..8d91d111b 100644
--- a/src/Infrastructure/BotSharp.OpenAPI/Controllers/ConversationController.cs
+++ b/src/Infrastructure/BotSharp.OpenAPI/Controllers/ConversationController.cs
@@ -89,7 +89,8 @@ public async Task<IEnumerable<ChatResponseModel>> GetDialogs([FromRoute] string
                     CreatedAt = message.CreatedAt,
                     Text = !string.IsNullOrEmpty(message.SecondaryContent) ? message.SecondaryContent : message.Content,
                     Data = message.Data,
-                    Sender = UserViewModel.FromUser(user)
+                    Sender = UserViewModel.FromUser(user),
+                    Payload = message.Payload
                 });
             }
             else if (message.Role == AgentRole.Assistant)
diff --git a/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Conversations/ChatResponseModel.cs b/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Conversations/ChatResponseModel.cs
index cf71b8f93..a03f1211d 100644
--- a/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Conversations/ChatResponseModel.cs
+++ b/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Conversations/ChatResponseModel.cs
@@ -28,6 +28,10 @@ public class ChatResponseModel : InstructResult
     [JsonPropertyName("rich_content")]
     public RichContent<IRichMessage>? RichContent { get; set; }
 
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    [JsonPropertyName("payload")]
+    public string? Payload { get; set; }
+
     [JsonPropertyName("created_at")]
     public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
 }
diff --git a/src/Plugins/BotSharp.Plugin.MongoStorage/Models/DialogMongoElement.cs b/src/Plugins/BotSharp.Plugin.MongoStorage/Models/DialogMongoElement.cs
index 6ebc16ff4..5c2a1698e 100644
--- a/src/Plugins/BotSharp.Plugin.MongoStorage/Models/DialogMongoElement.cs
+++ b/src/Plugins/BotSharp.Plugin.MongoStorage/Models/DialogMongoElement.cs
@@ -9,6 +9,7 @@ public class DialogMongoElement
     public string? SecondaryContent { get; set; }
     public string? RichContent { get; set; }
     public string? SecondaryRichContent { get; set; }
+    public string? Payload { get; set; }
 
     public DialogMongoElement()
     {
@@ -23,7 +24,8 @@ public static DialogMongoElement ToMongoElement(DialogElement dialog)
             Content = dialog.Content,
             SecondaryContent = dialog.SecondaryContent,
             RichContent = dialog.RichContent,
-            SecondaryRichContent = dialog.SecondaryRichContent
+            SecondaryRichContent = dialog.SecondaryRichContent,
+            Payload = dialog.Payload
         };
     }
 
@@ -35,7 +37,8 @@ public static DialogElement ToDomainElement(DialogMongoElement dialog)
             Content = dialog.Content,
             SecondaryContent = dialog.SecondaryContent,
             RichContent = dialog.RichContent,
-            SecondaryRichContent = dialog.SecondaryRichContent
+            SecondaryRichContent = dialog.SecondaryRichContent,
+            Payload = dialog.Payload
         };
     }
 }