diff --git a/lib/node/client.ml b/lib/node/client.ml
index 71fa904..5109468 100644
--- a/lib/node/client.ml
+++ b/lib/node/client.ml
@@ -85,3 +85,6 @@ let request node request recipient =
 
 let post node message =
   !node.disseminator <- Disseminator.post !node.disseminator message
+
+let broadcast node message =
+  Message.{ message with recipients = peers !node } |> Networking.send_to node
diff --git a/lib/node/client.mli b/lib/node/client.mli
index eb4c2ce..da30142 100644
--- a/lib/node/client.mli
+++ b/lib/node/client.mli
@@ -46,3 +46,7 @@ val request : node ref -> bytes -> Address.t -> Message.t Lwt.t
 val create_post : node ref -> ?request_ack:bool -> bytes -> Message.t
 
 val create_ack : node ref -> Message.t -> Message.t
+
+(** [broadcast node message] immediately sends a [Message.t] of the {i Post category}
+    to all the peers of the given node. The message is sent only once. *)
+val broadcast : node ref -> Message.t -> unit Lwt.t