diff --git a/src/plugins/websocket/events.rs b/src/plugins/websocket/events.rs
index e00a861..19c755d 100644
--- a/src/plugins/websocket/events.rs
+++ b/src/plugins/websocket/events.rs
@@ -3,6 +3,7 @@ use std::collections::HashMap;
 use actix::prelude::*;
 use log::*;
 use serde::{Deserialize, Serialize};
+use serde_json::Value;
 
 use crate::core::{error::Error, site::models::SiteInfo};
 
@@ -38,6 +39,7 @@ impl Handler<RegisterWSClient> for WebsocketController {
 pub enum ServerEvent {
     Event { cmd: String, params: EventType },
     Notification { cmd: String, params: Value },
+    Confirm { cmd: String, params: Value },
 }
 
 #[allow(clippy::enum_variant_names)]
diff --git a/src/plugins/websocket/mod.rs b/src/plugins/websocket/mod.rs
index 196bdd0..718c141 100644
--- a/src/plugins/websocket/mod.rs
+++ b/src/plugins/websocket/mod.rs
@@ -5,7 +5,7 @@ pub mod request;
 pub mod response;
 
 use futures::executor::block_on;
-use serde_json::json;
+use serde_json::{json, Value};
 
 use std::collections::HashMap;
 
@@ -100,6 +100,8 @@ pub async fn serve_websocket(
         site_addr: addr,
         address,
         channels: vec![],
+        next_message_id: 0,
+        waiting_callbacks: HashMap::new(),
     };
     let (addr, res) = WsResponseBuilder::new(websocket, &req, stream)
         .start_with_addr()
@@ -108,6 +110,8 @@ pub async fn serve_websocket(
     Ok(res)
 }
 
+type WaitingCallback = Box<dyn FnOnce(&mut ZeruWebsocket, serde_json::Value) -> ()>;
+
 pub struct ZeruWebsocket {
     site_controller: Addr<SitesController>,
     user_controller: Addr<UserController>,
@@ -115,6 +119,8 @@ pub struct ZeruWebsocket {
     site_addr: actix::Addr<Site>,
     address: Address,
     channels: Vec<String>,
+    next_message_id: usize,
+    waiting_callbacks: HashMap<usize, WaitingCallback>,
 }
 
 impl Actor for ZeruWebsocket {
@@ -284,6 +290,33 @@ impl ZeruWebsocket {
         Ok(())
     }
 
+    fn cmd(
+        &mut self,
+        cmd: &str,
+        params: Value,
+        callback: Option<WaitingCallback>,
+    ) -> Result<(), Error> {
+        let id = self.next_message_id;
+        self.next_message_id += 1;
+        if let Some(callback) = callback {
+            self.waiting_callbacks.insert(id, callback);
+        }
+        match cmd {
+            "confirm" => {
+                self.confirm(params);
+                return Ok(());
+            }
+            _ => unimplemented!("Command not implemented: {}", cmd),
+        }
+    }
+
+    fn confirm(&mut self, params: Value) {
+        self.ws_controller.do_send(ServerEvent::Confirm {
+            cmd: "confirm".to_string(),
+            params,
+        });
+    }
+
     fn is_admin_site(&mut self) -> Result<bool, Error> {
         let site = block_on(self.site_addr.send(SiteInfoRequest {}))??;
         let res = site
@@ -368,6 +401,9 @@ impl ZeruWebsocket {
             // });
         };
         let mut msg = response?;
+        if msg.is_command() {
+            return Ok(());
+        }
         self.respond(ctx, &mut msg)
     }
 
diff --git a/src/plugins/websocket/request.rs b/src/plugins/websocket/request.rs
index 0aef2af..919550a 100644
--- a/src/plugins/websocket/request.rs
+++ b/src/plugins/websocket/request.rs
@@ -137,4 +137,9 @@ impl Command {
         let resp = Message::inject_script(self.id, serde_json::to_value(body)?);
         Ok(resp)
     }
+
+    pub fn command(&self) -> Result<Message, Error> {
+        let resp = Message::command();
+        Ok(resp)
+    }
 }
diff --git a/src/plugins/websocket/response.rs b/src/plugins/websocket/response.rs
index 67ef255..f92e9d9 100644
--- a/src/plugins/websocket/response.rs
+++ b/src/plugins/websocket/response.rs
@@ -1,4 +1,5 @@
 use serde::{Deserialize, Serialize};
+use serde_json::json;
 
 use crate::utils::is_default;
 
@@ -12,9 +13,10 @@ pub struct Message {
     result: serde_json::Value,
 }
 
-#[derive(Serialize, Deserialize)]
+#[derive(Serialize, Deserialize, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub enum MessageType {
+    Command,
     InjectScript,
     Response,
     Error,
@@ -39,4 +41,17 @@ impl Message {
             id: 0,
         }
     }
+
+    pub fn is_command(&self) -> bool {
+        self.cmd == MessageType::Command
+    }
+
+    pub fn command() -> Message {
+        Message {
+            cmd: MessageType::Command,
+            to: 0,
+            result: json!(null),
+            id: 0,
+        }
+    }
 }