diff --git a/api/message/slack-api-message-thread_broadcast.c b/api/message/slack-api-message-thread_broadcast.c
new file mode 100644
index 0000000..1c3c4e5
--- /dev/null
+++ b/api/message/slack-api-message-thread_broadcast.c
@@ -0,0 +1,99 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, version 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <json.h>
+#include <string.h>
+
+#include "../../weechat-plugin.h"
+#include "../../slack.h"
+#include "../../slack-workspace.h"
+#include "../../slack-message.h"
+#include "../../slack-api.h"
+#include "../../slack-channel.h"
+#include "../../slack-user.h"
+#include "../slack-api-message.h"
+#include "slack-api-message-thread_broadcast.h"
+
+static const char *subtype = "thread_broadcast";
+
+static inline int json_valid(json_object *object, struct t_slack_workspace *workspace)
+{
+    if (!object)
+    {
+        weechat_printf(
+            workspace->buffer,
+            _("%s%s: error handling websocket %smessage.%s%s message: "
+              "unexpected response from server"),
+            weechat_prefix("error"), SLACK_PLUGIN_NAME,
+            weechat_color("chat_value"), subtype, weechat_color("reset"));
+        return 0;
+    }
+
+    return 1;
+}
+
+int slack_api_message_thread_broadcast_handle(struct t_slack_workspace *workspace,
+                                              json_object *root, const char *user,
+                                              const char *text, const char *ts)
+{
+    struct t_slack_channel *ptr_channel;
+    struct t_slack_user *ptr_user;
+    struct t_slack_channel_typing *ptr_typing;
+
+    /*
+    ptr_channel = slack_channel_search(workspace, channel);
+    if (!ptr_channel)
+        return 1; // silently ignore if channel hasn't been loaded yet
+    ptr_user = slack_user_search(workspace, user);
+    if (!ptr_user)
+        return 1; // silently ignore if user hasn't been loaded yet
+
+    char *message = slack_message_decode(workspace, text);
+    weechat_printf_date_tags(
+        ptr_channel->buffer,
+        (time_t)atof(ts),
+        "slack_message,slack_thread_broadcast",
+        _("%s%s"),
+        slack_user_as_prefix(workspace, ptr_user, NULL),
+        message);
+    free(message);
+
+    ptr_typing = slack_channel_typing_search(ptr_channel,
+                                             ptr_user->profile.display_name);
+    if (ptr_typing)
+    {
+        slack_channel_typing_free(ptr_channel, ptr_typing);
+        slack_channel_typing_cb(ptr_channel, NULL, 0);
+    }
+    */
+
+    return 1;
+}
+
+int slack_api_message_thread_broadcast(struct t_slack_workspace *workspace,
+                                       json_object *message)
+{
+    json_object *root, *user, *text, *ts;
+    root = json_object_object_get(message, "root");
+    if (!json_valid(root, workspace))
+        return 0;
+
+    user = json_object_object_get(message, "user");
+    if (!json_valid(user, workspace))
+        return 0;
+
+    text = json_object_object_get(message, "text");
+    if (!json_valid(text, workspace))
+        return 0;
+
+    ts = json_object_object_get(message, "ts");
+    if (!json_valid(ts, workspace))
+        return 0;
+
+    return slack_api_message_thread_broadcast_handle(workspace,
+            root, json_object_get_string(user),
+                  json_object_get_string(text),
+                  json_object_get_string(ts));
+}
+
diff --git a/api/message/slack-api-message-thread_broadcast.h b/api/message/slack-api-message-thread_broadcast.h
new file mode 100644
index 0000000..ea56ce7
--- /dev/null
+++ b/api/message/slack-api-message-thread_broadcast.h
@@ -0,0 +1,12 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, version 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef _SLACK_API_MESSAGE_THREAD_BROADCAST_H_
+#define _SLACK_API_MESSAGE_THREAD_BROADCAST_H_
+
+int slack_api_message_thread_broadcast(
+        struct t_slack_workspace *workspace,
+        json_object *message);
+
+#endif /*SLACK_API_MESSAGE_THREAD_BROADCAST_H*/