diff --git a/src/ModelContextProtocol.Core/Protocol/NotificationParams.cs b/src/ModelContextProtocol.Core/Protocol/NotificationParams.cs
index 54432a4c..49899aa8 100644
--- a/src/ModelContextProtocol.Core/Protocol/NotificationParams.cs
+++ b/src/ModelContextProtocol.Core/Protocol/NotificationParams.cs
@@ -21,4 +21,21 @@ private protected NotificationParams()
     /// </remarks>
     [JsonPropertyName("_meta")]
     public JsonObject? Meta { get; set; }
+
+    /// <summary>
+    /// Merges additional metadata into the existing Meta object.
+    /// </summary>
+    /// <param name="additionalMeta">The additional metadata to merge.</param>
+    public void MergeMeta(JsonObject additionalMeta)
+    {
+        if (Meta == null)
+        {
+            Meta = new JsonObject();
+        }
+
+        foreach (var kvp in additionalMeta)
+        {
+            Meta[kvp.Key] = kvp.Value;
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/ModelContextProtocol.Core/Protocol/RequestParams.cs b/src/ModelContextProtocol.Core/Protocol/RequestParams.cs
index b45f55f7..4d2ced30 100644
--- a/src/ModelContextProtocol.Core/Protocol/RequestParams.cs
+++ b/src/ModelContextProtocol.Core/Protocol/RequestParams.cs
@@ -65,4 +65,21 @@ public ProgressToken? ProgressToken
             }
         }
     }
+
+    /// <summary>
+    /// Merges additional metadata into the existing Meta object.
+    /// </summary>
+    /// <param name="additionalMeta">The additional metadata to merge.</param>
+    public void MergeMeta(JsonObject additionalMeta)
+    {
+        if (Meta == null)
+        {
+            Meta = new JsonObject();
+        }
+
+        foreach (var kvp in additionalMeta)
+        {
+            Meta[kvp.Key] = kvp.Value;
+        }
+    }
 }
diff --git a/src/ModelContextProtocol.Core/Protocol/Result.cs b/src/ModelContextProtocol.Core/Protocol/Result.cs
index 58b076dd..fd984da2 100644
--- a/src/ModelContextProtocol.Core/Protocol/Result.cs
+++ b/src/ModelContextProtocol.Core/Protocol/Result.cs
@@ -21,4 +21,21 @@ private protected Result()
     /// </remarks>
     [JsonPropertyName("_meta")]
     public JsonObject? Meta { get; set; }
+
+    /// <summary>
+    /// Merges additional metadata into the existing Meta object.
+    /// </summary>
+    /// <param name="additionalMeta">The additional metadata to merge.</param>
+    public void MergeMeta(JsonObject additionalMeta)
+    {
+        if (Meta == null)
+        {
+            Meta = new JsonObject();
+        }
+
+        foreach (var kvp in additionalMeta)
+        {
+            Meta[kvp.Key] = kvp.Value;
+        }
+    }
 }