diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
index 82e4b731d..a07ab075d 100644
--- a/api-ref/source/parameters.yaml
+++ b/api-ref/source/parameters.yaml
@@ -1,4 +1,4 @@
-#### variables in header #####################################################
+# variables in header
 
 client_id:
   type: string
@@ -17,7 +17,7 @@ client_id:
     are not echoed back to the client that posted them, unless the client
     explicitly requests this.
 
-#### variables in path #######################################################
+# variables in path
 
 claim_id:
   type: string
@@ -61,7 +61,7 @@ subscription_id_path:
   description: |
     The id of the subscription.
 
-#### variables in query ######################################################
+# variables in query
 
 claim_limit:
   type: integer
@@ -143,7 +143,7 @@ pop:
     ``pop`` & ``ids`` parameters are mutually exclusive. Using them together
     in a request will result in HTTP 400.
 
-#### variables in request ####################################################
+# variables in body
 
 _dead_letter_queue:
   type: string
@@ -167,6 +167,27 @@ _dead_letter_queue_messages_ttl:
     not set, current TTL will be kept. It is one of the ``reserved attributes``
     of Zaqar queues.
 
+_dead_letter_queue_messages_ttl_response:
+  type: integer
+  in: body
+  required: True
+  description: |
+    The new TTL setting for messages when moved to dead letter queue. If it's
+    not set, current TTL will be kept. It is one of the ``reserved attributes``
+    of Zaqar queues.
+
+_dead_letter_queue_response:
+  type: string
+  in: body
+  required: True
+  description: |
+    The target the message will be moved to when the message can't processed
+    successfully after meet the max claim count. It's not supported to add
+    queue C as the dead letter queue for queue B where queue B has been set
+    as a dead letter queue for queue A. There is no default value for this
+    attribute. If it's not set explicitly, then that means there is no dead
+    letter queue for current queue. It is one of the ``reserved attributes``
+
 _default_message_delay:
   type: string
   in: body
@@ -179,6 +200,17 @@ _default_message_delay:
     a higher priority. It is one of the ``reserved attributes`` of Zaqar
     queues.
 
+_default_message_delay_response:
+  type: string
+  in: body
+  required: True
+  description: |
+    The delay of messages defined for a queue. When the messages send to
+    the queue, it will be delayed for some times and means it can not be
+    claimed until the delay expired. And user can define a queue's level
+    value for delay, also can define a message's level. The latter has
+    a higher priority. It is one of the ``reserved attributes`` of Zaqar
+
 _default_message_ttl:
   type: integer
   in: body
@@ -211,6 +243,17 @@ _max_claim_count:
     won't be enabled for current queue. It is one of the
     ``reserved attributes`` of Zaqar queues.
 
+_max_claim_count_response:
+  type: integer
+  in: body
+  required: True
+  description: |
+    The max number the message can be claimed. Generally,
+    it means the message cannot be processed successfully. There is no default
+    value for this attribute. If it's not set, then that means this feature
+    won't be enabled for current queue. It is one of the
+    ``reserved attributes`` of Zaqar queues.
+
 _max_messages_post_size:
   type: integer
   in: body
@@ -529,7 +572,6 @@ subscription_ttl:
     The ``ttl`` attribute specifies how long the subscription be alive. The ttl
     value must be great than 60 seconds. The default value is 3600 seconds.
 
-
 subscriptions:
   type: list
   in: body
diff --git a/api-ref/source/queues.inc b/api-ref/source/queues.inc
index 040ee3e32..7bc585a35 100644
--- a/api-ref/source/queues.inc
+++ b/api-ref/source/queues.inc
@@ -217,8 +217,11 @@ Response Parameters
 .. rest_parameters:: parameters.yaml
 
   - _max_messages_post_size: _max_messages_post_size
-  - _default_message_delay: _default_message_delay
+  - _default_message_delay: _default_message_delay_response
   - _default_message_ttl: _default_message_ttl
+  - _max_claim_count: _max_claim_count_response
+  - _dead_letter_queue: _dead_letter_queue_response
+  - _dead_letter_queue_messages_ttl: _dead_letter_queue_messages_ttl_response
 
 Response Example
 ----------------
diff --git a/api-ref/source/samples/queue-show-response.json b/api-ref/source/samples/queue-show-response.json
index 2dd85e49e..2303f2a5a 100644
--- a/api-ref/source/samples/queue-show-response.json
+++ b/api-ref/source/samples/queue-show-response.json
@@ -1,5 +1,8 @@
 {
     "_max_messages_post_size": 262144,
     "_default_message_ttl": 3600,
-    "description": "Queue used for billing."
+    "description": "Queue used for billing.",
+    "_max_claim_count": 10,
+    "_dead_letter_queue": "dead_letter",
+    "_dead_letter_queue_messages_ttl": 3600
 }
\ No newline at end of file