diff --git a/src/main/java/com/meta/cp4m/message/FBMessage.java b/src/main/java/com/meta/cp4m/message/FBMessage.java
index 8846130..618d7b4 100644
--- a/src/main/java/com/meta/cp4m/message/FBMessage.java
+++ b/src/main/java/com/meta/cp4m/message/FBMessage.java
@@ -10,6 +10,7 @@
 
 import com.meta.cp4m.Identifier;
 import java.time.Instant;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
 public record FBMessage(
     Instant timestamp,
@@ -17,5 +18,17 @@ public record FBMessage(
     Identifier senderId,
     Identifier recipientId,
     String message,
-    Role role)
-    implements Message {}
+    Role role,
+    @Nullable String accessToken)
+    implements Message {
+
+  public FBMessage(
+      Instant timestamp,
+      Identifier instanceId,
+      Identifier senderId,
+      Identifier recipientId,
+      String message,
+      Role role) {
+    this(timestamp, instanceId, senderId, recipientId, message, role, null);
+  }
+}
diff --git a/src/main/java/com/meta/cp4m/message/FBMessageHandler.java b/src/main/java/com/meta/cp4m/message/FBMessageHandler.java
index a84625b..6a4369c 100644
--- a/src/main/java/com/meta/cp4m/message/FBMessageHandler.java
+++ b/src/main/java/com/meta/cp4m/message/FBMessageHandler.java
@@ -158,12 +158,14 @@ private List<FBMessage> postHandler(Context ctx, JsonNode body) {
   @Override
   public void respond(FBMessage message) throws IOException {
     List<String> chunkedText = CHUNKER.chunks(message.message()).toList();
+    String accessToken = message.accessToken() == null ? this.accessToken : message.accessToken();
     for (String text : chunkedText) {
-      send(text, message.recipientId(), message.senderId());
+      send(text, message.recipientId(), message.senderId(), accessToken);
     }
   }
 
-  private void send(String message, Identifier recipient, Identifier sender) throws IOException {
+  private void send(String message, Identifier recipient, Identifier sender, String accessToken)
+      throws IOException {
     URI url;
     ObjectNode body = MAPPER.createObjectNode();
     body.put("messaging_type", "RESPONSE").putObject("recipient").put("id", recipient.toString());