diff --git a/server/auth.js b/server/auth.js
index 5cf96b6f..597cf3d7 100644
--- a/server/auth.js
+++ b/server/auth.js
@@ -130,7 +130,7 @@ function userAuthorizer(username, password, callback) {
  * @param {express.Request} req Express request object
  * @param {express.Response} res Express response object
  * @param {express.NextFunction} next Next handler in chain
- * @returns {void}
+ * @returns {Promise<void>}
  */
 exports.basicAuth = async function (req, res, next) {
     const middleware = basicAuth({
@@ -153,7 +153,7 @@ exports.basicAuth = async function (req, res, next) {
  * @param {express.Request} req Express request object
  * @param {express.Response} res Express response object
  * @param {express.NextFunction} next Next handler in chain
- * @returns {void}
+ * @returns {Promise<void>}
  */
 exports.apiAuth = async function (req, res, next) {
     if (!await Settings.get("disableAuth")) {
diff --git a/server/database.js b/server/database.js
index 4a12746f..cfe14fe7 100644
--- a/server/database.js
+++ b/server/database.js
@@ -378,7 +378,7 @@ class Database {
 
     /**
      * Patch the database
-     * @returns {void}
+     * @returns {Promise<void>}
      */
     static async patch() {
         // Still need to keep this for old versions of Uptime Kuma
diff --git a/server/docker.js b/server/docker.js
index bec0e0b1..ee6051df 100644
--- a/server/docker.js
+++ b/server/docker.js
@@ -65,7 +65,7 @@ class DockerHost {
     /**
      * Fetches the amount of containers on the Docker host
      * @param {object} dockerHost Docker host to check for
-     * @returns {number} Total amount of containers on the host
+     * @returns {Promise<number>} Total amount of containers on the host
      */
     static async testDockerHost(dockerHost) {
         const options = {
diff --git a/server/model/group.js b/server/model/group.js
index 98ac2a47..bd2c3018 100644
--- a/server/model/group.js
+++ b/server/model/group.js
@@ -9,7 +9,7 @@ class Group extends BeanModel {
      * @param {boolean} showTags Should the JSON include monitor tags
      * @param {boolean} certExpiry Should JSON include info about
      * certificate expiry?
-     * @returns {object} Object ready to parse
+     * @returns {Promise<object>} Object ready to parse
      */
     async toPublicJSON(showTags = false, certExpiry = false) {
         let monitorBeanList = await this.getMonitorList();
@@ -29,7 +29,7 @@ class Group extends BeanModel {
 
     /**
      * Get all monitors
-     * @returns {Bean[]} List of monitors
+     * @returns {Promise<Bean[]>} List of monitors
      */
     async getMonitorList() {
         return R.convertToBeans("monitor", await R.getAll(`
diff --git a/server/model/maintenance.js b/server/model/maintenance.js
index fb51060e..516c0377 100644
--- a/server/model/maintenance.js
+++ b/server/model/maintenance.js
@@ -11,7 +11,7 @@ class Maintenance extends BeanModel {
     /**
      * Return an object that ready to parse to JSON for public
      * Only show necessary data to public
-     * @returns {object} Object ready to parse
+     * @returns {Promise<object>} Object ready to parse
      */
     async toPublicJSON() {
 
@@ -98,7 +98,7 @@ class Maintenance extends BeanModel {
     /**
      * Return an object that ready to parse to JSON
      * @param {string} timezone If not specified, the timeRange will be in UTC
-     * @returns {object} Object ready to parse
+     * @returns {Promise<object>} Object ready to parse
      */
     async toJSON(timezone = null) {
         return this.toPublicJSON(timezone);
@@ -143,7 +143,7 @@ class Maintenance extends BeanModel {
      * Convert data from socket to bean
      * @param {Bean} bean Bean to fill in
      * @param {object} obj Data to fill bean with
-     * @returns {Bean} Filled bean
+     * @returns {Promise<Bean>} Filled bean
      */
     static async jsonToBean(bean, obj) {
         if (obj.id) {
@@ -189,9 +189,9 @@ class Maintenance extends BeanModel {
     /**
      * Throw error if cron is invalid
      * @param {string|Date} cron Pattern or date
-     * @returns {Promise<void>}
+     * @returns {void}
      */
-    static async validateCron(cron) {
+    static validateCron(cron) {
         let job = new Cron(cron, () => {});
         job.stop();
     }
@@ -324,7 +324,7 @@ class Maintenance extends BeanModel {
 
     /**
      * Is this maintenance currently active
-     * @returns {boolean} The maintenance is active?
+     * @returns {Promise<boolean>} The maintenance is active?
      */
     async isUnderMaintenance() {
         return (await this.getStatus()) === "under-maintenance";
@@ -332,7 +332,7 @@ class Maintenance extends BeanModel {
 
     /**
      * Get the timezone of the maintenance
-     * @returns {string} timezone
+     * @returns {Promise<string>} timezone
      */
     async getTimezone() {
         if (!this.timezone || this.timezone === "SAME_AS_SERVER") {
@@ -343,7 +343,7 @@ class Maintenance extends BeanModel {
 
     /**
      * Get offset for timezone
-     * @returns {string} offset
+     * @returns {Promise<string>} offset
      */
     async getTimezoneOffset() {
         return dayjs.tz(dayjs(), await this.getTimezone()).format("Z");
@@ -351,7 +351,7 @@ class Maintenance extends BeanModel {
 
     /**
      * Get the current status of the maintenance
-     * @returns {string} Current status
+     * @returns {Promise<string>} Current status
      */
     async getStatus() {
         if (!this.active) {
diff --git a/server/model/monitor.js b/server/model/monitor.js
index fbed48f9..1667b83a 100644
--- a/server/model/monitor.js
+++ b/server/model/monitor.js
@@ -43,7 +43,7 @@ class Monitor extends BeanModel {
      * @param {boolean} showTags Include tags in JSON
      * @param {boolean} certExpiry Include certificate expiry info in
      * JSON
-     * @returns {object} Object ready to parse
+     * @returns {Promise<object>} Object ready to parse
      */
     async toPublicJSON(showTags = false, certExpiry = false) {
         let obj = {
@@ -74,7 +74,7 @@ class Monitor extends BeanModel {
      * Return an object that ready to parse to JSON
      * @param {boolean} includeSensitiveData Include sensitive data in
      * JSON
-     * @returns {object} Object ready to parse
+     * @returns {Promise<object>} Object ready to parse
      */
     async toJSON(includeSensitiveData = true) {
 
@@ -328,9 +328,9 @@ class Monitor extends BeanModel {
     /**
      * Start monitor
      * @param {Server} io Socket server instance
-     * @returns {void}
+     * @returns {Promise<void>}
      */
-    start(io) {
+    async start(io) {
         let previousBeat = null;
         let retries = 0;
 
@@ -947,7 +947,7 @@ class Monitor extends BeanModel {
                 log.debug("monitor", `[${this.name}] apicache clear`);
                 apicache.clear();
 
-                UptimeKumaServer.getInstance().sendMaintenanceListByUserID(this.user_id);
+                await UptimeKumaServer.getInstance().sendMaintenanceListByUserID(this.user_id);
 
             } else {
                 bean.important = false;
@@ -1102,9 +1102,9 @@ class Monitor extends BeanModel {
 
     /**
      * Stop monitor
-     * @returns {void}
+     * @returns {Promise<void>}
      */
-    stop() {
+    async stop() {
         clearTimeout(this.heartbeatInterval);
         this.isStop = true;
 
@@ -1377,7 +1377,7 @@ class Monitor extends BeanModel {
             let notifyDays = await setting("tlsExpiryNotifyDays");
             if (notifyDays == null || !Array.isArray(notifyDays)) {
                 // Reset Default
-                setSetting("tlsExpiryNotifyDays", [ 7, 14, 21 ], "general");
+                await setSetting("tlsExpiryNotifyDays", [ 7, 14, 21 ], "general");
                 notifyDays = [ 7, 14, 21 ];
             }
 
diff --git a/server/model/status_page.js b/server/model/status_page.js
index 06fa7a68..23558298 100644
--- a/server/model/status_page.js
+++ b/server/model/status_page.js
@@ -18,7 +18,7 @@ class StatusPage extends BeanModel {
      * @param {Response} response Response object
      * @param {string} indexHTML HTML to render
      * @param {string} slug Status page slug
-     * @returns {void}
+     * @returns {Promise<void>}
      */
     static async handleStatusPageResponse(response, indexHTML, slug) {
         // Handle url with trailing slash (http://localhost:3001/status/)
@@ -42,7 +42,7 @@ class StatusPage extends BeanModel {
      * SSR for status pages
      * @param {string} indexHTML HTML page to render
      * @param {StatusPage} statusPage Status page populate HTML with
-     * @returns {void}
+     * @returns {Promise<string>} the rendered html
      */
     static async renderHTML(indexHTML, statusPage) {
         const $ = cheerio.load(indexHTML);
diff --git a/server/monitor-types/monitor-type.js b/server/monitor-types/monitor-type.js
index 782bedd5..eb75307b 100644
--- a/server/monitor-types/monitor-type.js
+++ b/server/monitor-types/monitor-type.js
@@ -1,5 +1,4 @@
 class MonitorType {
-
     name = undefined;
 
     /**
diff --git a/server/monitor-types/mqtt.js b/server/monitor-types/mqtt.js
index cff5c93d..9b2db43d 100644
--- a/server/monitor-types/mqtt.js
+++ b/server/monitor-types/mqtt.js
@@ -81,7 +81,8 @@ class MqttMonitorType extends MonitorType {
 
             let client = mqtt.connect(mqttUrl, {
                 username,
-                password
+                password,
+                clientId: "uptime-kuma_" + Math.random().toString(16).substr(2, 8)
             });
 
             client.on("connect", () => {
diff --git a/server/monitor-types/tailscale-ping.js b/server/monitor-types/tailscale-ping.js
index 0a39544e..5950cc21 100644
--- a/server/monitor-types/tailscale-ping.js
+++ b/server/monitor-types/tailscale-ping.js
@@ -16,7 +16,7 @@ class TailscalePing extends MonitorType {
      * @param {object} monitor The monitor object associated with the check.
      * @param {object} heartbeat The heartbeat object to update.
      * @returns {Promise<void>}
-     * @throws Will throw an error if checking Tailscale ping encounters any error
+     * @throws Error if checking Tailscale ping encounters any error
      */
     async check(monitor, heartbeat) {
         try {
diff --git a/server/notification-providers/alerta.js b/server/notification-providers/alerta.js
index 62092178..f9a273b4 100644
--- a/server/notification-providers/alerta.js
+++ b/server/notification-providers/alerta.js
@@ -3,17 +3,15 @@ const { DOWN, UP } = require("../../src/util");
 const axios = require("axios");
 
 class Alerta extends NotificationProvider {
-
     name = "alerta";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
-            let alertaUrl = `${notification.alertaApiEndpoint}`;
             let config = {
                 headers: {
                     "Content-Type": "application/json;charset=UTF-8",
@@ -40,7 +38,7 @@ class Alerta extends NotificationProvider {
                     resource: "Message",
                 }, data);
 
-                await axios.post(alertaUrl, postData, config);
+                await axios.post(notification.alertaApiEndpoint, postData, config);
             } else {
                 let datadup = Object.assign( {
                     correlate: [ "service_up", "service_down" ],
@@ -52,11 +50,11 @@ class Alerta extends NotificationProvider {
                 if (heartbeatJSON["status"] === DOWN) {
                     datadup.severity = notification.alertaAlertState; // critical
                     datadup.text = "Service " + monitorJSON["type"] + " is down.";
-                    await axios.post(alertaUrl, datadup, config);
+                    await axios.post(notification.alertaApiEndpoint, datadup, config);
                 } else if (heartbeatJSON["status"] === UP) {
                     datadup.severity = notification.alertaRecoverState; // cleaned
                     datadup.text = "Service " + monitorJSON["type"] + " is up.";
-                    await axios.post(alertaUrl, datadup, config);
+                    await axios.post(notification.alertaApiEndpoint, datadup, config);
                 }
             }
             return okMsg;
diff --git a/server/notification-providers/alertnow.js b/server/notification-providers/alertnow.js
index 1206b72e..4257ca9c 100644
--- a/server/notification-providers/alertnow.js
+++ b/server/notification-providers/alertnow.js
@@ -4,14 +4,14 @@ const { setting } = require("../util-server");
 const { getMonitorRelativeURL, UP, DOWN } = require("../../src/util");
 
 class AlertNow extends NotificationProvider {
-
     name = "AlertNow";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+
         try {
             let textMsg = "";
             let status = "open";
diff --git a/server/notification-providers/aliyun-sms.js b/server/notification-providers/aliyun-sms.js
index 1718bbfe..ff38bd0d 100644
--- a/server/notification-providers/aliyun-sms.js
+++ b/server/notification-providers/aliyun-sms.js
@@ -11,7 +11,7 @@ class AliyunSMS extends NotificationProvider {
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
             if (heartbeatJSON != null) {
@@ -44,7 +44,7 @@ class AliyunSMS extends NotificationProvider {
      * Send the SMS notification
      * @param {BeanModel} notification Notification details
      * @param {string} msgbody Message template
-     * @returns {boolean} True if successful else false
+     * @returns {Promise<boolean>} True if successful else false
      */
     async sendSms(notification, msgbody) {
         let params = {
diff --git a/server/notification-providers/apprise.js b/server/notification-providers/apprise.js
index 5e4d23c3..0f698214 100644
--- a/server/notification-providers/apprise.js
+++ b/server/notification-providers/apprise.js
@@ -2,13 +2,14 @@ const NotificationProvider = require("./notification-provider");
 const childProcessAsync = require("promisify-child-process");
 
 class Apprise extends NotificationProvider {
-
     name = "apprise";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
+        const okMsg = "Sent Successfully.";
+
         const args = [ "-vv", "-b", msg, notification.appriseURL ];
         if (notification.title) {
             args.push("-t");
@@ -23,7 +24,7 @@ class Apprise extends NotificationProvider {
         if (output) {
 
             if (! output.includes("ERROR")) {
-                return "Sent Successfully";
+                return okMsg;
             }
 
             throw new Error(output);
diff --git a/server/notification-providers/bark.js b/server/notification-providers/bark.js
index 7fe9a7a9..0907d5f1 100644
--- a/server/notification-providers/bark.js
+++ b/server/notification-providers/bark.js
@@ -46,29 +46,29 @@ class Bark extends NotificationProvider {
     }
 
     /**
-     * Add additional parameter for Bark v1 endpoints
+     * Add additional parameter for Bark v1 endpoints.
+     * Leads to better on device styles (iOS 15 optimized)
      * @param {BeanModel} notification Notification to send
-     * @param {string} postUrl URL to append parameters to
      * @returns {string} Additional URL parameters
      */
-    appendAdditionalParameters(notification, postUrl) {
+    additionalParameters(notification) {
         // set icon to uptime kuma icon, 11kb should be fine
-        postUrl += "?icon=" + barkNotificationAvatar;
+        let params = "?icon=" + barkNotificationAvatar;
         // grouping all our notifications
         if (notification.barkGroup != null) {
-            postUrl += "&group=" + notification.barkGroup;
+            params += "&group=" + notification.barkGroup;
         } else {
             // default name
-            postUrl += "&group=" + "UptimeKuma";
+            params += "&group=" + "UptimeKuma";
         }
         // picked a sound, this should follow system's mute status when arrival
         if (notification.barkSound != null) {
-            postUrl += "&sound=" + notification.barkSound;
+            params += "&sound=" + notification.barkSound;
         } else {
             // default sound
-            postUrl += "&sound=" + "telegraph";
+            params += "&sound=" + "telegraph";
         }
-        return postUrl;
+        return params;
     }
 
     /**
@@ -92,7 +92,7 @@ class Bark extends NotificationProvider {
      * @param {string} title Message title
      * @param {string} subtitle Message
      * @param {string} endpoint Endpoint to send request to
-     * @returns {string} Success message
+     * @returns {Promise<string>} Success message
      */
     async postNotification(notification, title, subtitle, endpoint) {
         let result;
@@ -100,9 +100,8 @@ class Bark extends NotificationProvider {
             // url encode title and subtitle
             title = encodeURIComponent(title);
             subtitle = encodeURIComponent(subtitle);
-            let postUrl = endpoint + "/" + title + "/" + subtitle;
-            postUrl = this.appendAdditionalParameters(notification, postUrl);
-            result = await axios.get(postUrl);
+            const params = this.additionalParameters(notification);
+            result = await axios.get(`${endpoint}/${title}/${subtitle}${params}`);
         } else {
             result = await axios.post(`${endpoint}/push`, {
                 title,
diff --git a/server/notification-providers/clicksendsms.js b/server/notification-providers/clicksendsms.js
index 5539a6a4..c090b7f3 100644
--- a/server/notification-providers/clicksendsms.js
+++ b/server/notification-providers/clicksendsms.js
@@ -2,14 +2,15 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class ClickSendSMS extends NotificationProvider {
-
     name = "clicksendsms";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+        const url = "https://rest.clicksend.com/v3/sms/send";
+
         try {
             let config = {
                 headers: {
@@ -28,7 +29,7 @@ class ClickSendSMS extends NotificationProvider {
                     }
                 ]
             };
-            let resp = await axios.post("https://rest.clicksend.com/v3/sms/send", data, config);
+            let resp = await axios.post(url, data, config);
             if (resp.data.data.messages[0].status !== "SUCCESS") {
                 let error = "Something gone wrong. Api returned " + resp.data.data.messages[0].status + ".";
                 this.throwGeneralAxiosError(error);
diff --git a/server/notification-providers/dingding.js b/server/notification-providers/dingding.js
index be3a2fbc..5e7f030b 100644
--- a/server/notification-providers/dingding.js
+++ b/server/notification-providers/dingding.js
@@ -10,7 +10,7 @@ class DingDing extends NotificationProvider {
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
             if (heartbeatJSON != null) {
@@ -21,7 +21,7 @@ class DingDing extends NotificationProvider {
                         text: `## [${this.statusToString(heartbeatJSON["status"])}] ${monitorJSON["name"]} \n> ${heartbeatJSON["msg"]}\n> Time (${heartbeatJSON["timezone"]}): ${heartbeatJSON["localDateTime"]}`,
                     }
                 };
-                if (this.sendToDingDing(notification, params)) {
+                if (await this.sendToDingDing(notification, params)) {
                     return okMsg;
                 }
             } else {
@@ -31,7 +31,7 @@ class DingDing extends NotificationProvider {
                         content: msg
                     }
                 };
-                if (this.sendToDingDing(notification, params)) {
+                if (await this.sendToDingDing(notification, params)) {
                     return okMsg;
                 }
             }
@@ -44,7 +44,7 @@ class DingDing extends NotificationProvider {
      * Send message to DingDing
      * @param {BeanModel} notification Notification to send
      * @param {object} params Parameters of message
-     * @returns {boolean} True if successful else false
+     * @returns {Promise<boolean>} True if successful else false
      */
     async sendToDingDing(notification, params) {
         let timestamp = Date.now();
diff --git a/server/notification-providers/discord.js b/server/notification-providers/discord.js
index f24cd616..f24d4725 100644
--- a/server/notification-providers/discord.js
+++ b/server/notification-providers/discord.js
@@ -3,14 +3,13 @@ const axios = require("axios");
 const { DOWN, UP } = require("../../src/util");
 
 class Discord extends NotificationProvider {
-
     name = "discord";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
             const discordDisplayName = notification.discordUsername || "Uptime Kuma";
diff --git a/server/notification-providers/feishu.js b/server/notification-providers/feishu.js
index dd5ce295..23af6911 100644
--- a/server/notification-providers/feishu.js
+++ b/server/notification-providers/feishu.js
@@ -9,8 +9,7 @@ class Feishu extends NotificationProvider {
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
-        let feishuWebHookUrl = notification.feishuWebHookUrl;
+        const okMsg = "Sent Successfully.";
 
         try {
             if (heartbeatJSON == null) {
@@ -20,7 +19,7 @@ class Feishu extends NotificationProvider {
                         text: msg,
                     },
                 };
-                await axios.post(feishuWebHookUrl, testdata);
+                await axios.post(notification.feishuWebHookUrl, testdata);
                 return okMsg;
             }
 
@@ -46,7 +45,7 @@ class Feishu extends NotificationProvider {
                         },
                     },
                 };
-                await axios.post(feishuWebHookUrl, downdata);
+                await axios.post(notification.feishuWebHookUrl, downdata);
                 return okMsg;
             }
 
@@ -72,7 +71,7 @@ class Feishu extends NotificationProvider {
                         },
                     },
                 };
-                await axios.post(feishuWebHookUrl, updata);
+                await axios.post(notification.feishuWebHookUrl, updata);
                 return okMsg;
             }
         } catch (error) {
diff --git a/server/notification-providers/freemobile.js b/server/notification-providers/freemobile.js
index 44c55bfd..4de45acd 100644
--- a/server/notification-providers/freemobile.js
+++ b/server/notification-providers/freemobile.js
@@ -2,14 +2,14 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class FreeMobile extends NotificationProvider {
-
     name = "FreeMobile";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+
         try {
             await axios.post(`https://smsapi.free-mobile.fr/sendmsg?msg=${encodeURIComponent(msg.replace("🔴", "⛔️"))}`, {
                 "user": notification.freemobileUser,
diff --git a/server/notification-providers/goalert.js b/server/notification-providers/goalert.js
index abf77924..847c6a00 100644
--- a/server/notification-providers/goalert.js
+++ b/server/notification-providers/goalert.js
@@ -3,21 +3,20 @@ const axios = require("axios");
 const { UP } = require("../../src/util");
 
 class GoAlert extends NotificationProvider {
-
     name = "GoAlert";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+
         try {
-            let closeAction = "close";
             let data = {
                 summary: msg,
             };
             if (heartbeatJSON != null && heartbeatJSON["status"] === UP) {
-                data["action"] = closeAction;
+                data["action"] = "close";
             }
             let headers = {
                 "Content-Type": "multipart/form-data",
@@ -27,7 +26,6 @@ class GoAlert extends NotificationProvider {
             };
             await axios.post(`${notification.goAlertBaseURL}/api/v2/generic/incoming?token=${notification.goAlertToken}`, data, config);
             return okMsg;
-
         } catch (error) {
             let msg = (error.response.data) ? error.response.data : "Error without response";
             throw new Error(msg);
diff --git a/server/notification-providers/google-chat.js b/server/notification-providers/google-chat.js
index 413fde26..9f1b53b7 100644
--- a/server/notification-providers/google-chat.js
+++ b/server/notification-providers/google-chat.js
@@ -5,14 +5,14 @@ const { getMonitorRelativeURL } = require("../../src/util");
 const { DOWN, UP } = require("../../src/util");
 
 class GoogleChat extends NotificationProvider {
-
     name = "GoogleChat";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+
         try {
             // Google Chat message formatting: https://developers.google.com/chat/api/guides/message-formats/basic
 
diff --git a/server/notification-providers/gorush.js b/server/notification-providers/gorush.js
index 28f03ab9..ba9d470f 100644
--- a/server/notification-providers/gorush.js
+++ b/server/notification-providers/gorush.js
@@ -2,14 +2,13 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class Gorush extends NotificationProvider {
-
     name = "gorush";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         let platformMapping = {
             "ios": 1,
diff --git a/server/notification-providers/gotify.js b/server/notification-providers/gotify.js
index 3e99b3d1..a52ef511 100644
--- a/server/notification-providers/gotify.js
+++ b/server/notification-providers/gotify.js
@@ -2,14 +2,14 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class Gotify extends NotificationProvider {
-
     name = "gotify";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+
         try {
             if (notification.gotifyserverurl && notification.gotifyserverurl.endsWith("/")) {
                 notification.gotifyserverurl = notification.gotifyserverurl.slice(0, -1);
diff --git a/server/notification-providers/grafana-oncall.js b/server/notification-providers/grafana-oncall.js
index ee1bfd47..e93c77cd 100644
--- a/server/notification-providers/grafana-oncall.js
+++ b/server/notification-providers/grafana-oncall.js
@@ -3,19 +3,18 @@ const axios = require("axios");
 const { DOWN, UP } = require("../../src/util");
 
 class GrafanaOncall extends NotificationProvider {
-
     name = "GrafanaOncall";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
+        const okMsg = "Sent Successfully.";
 
         if (!notification.GrafanaOncallURL) {
             throw new Error("GrafanaOncallURL cannot be empty");
         }
 
-        let okMsg = "Sent Successfully.";
         try {
             if (heartbeatJSON === null) {
                 let grafanaupdata = {
@@ -23,10 +22,7 @@ class GrafanaOncall extends NotificationProvider {
                     message: msg,
                     state: "alerting",
                 };
-                await axios.post(
-                    notification.GrafanaOncallURL,
-                    grafanaupdata
-                );
+                await axios.post(notification.GrafanaOncallURL, grafanaupdata);
                 return okMsg;
             } else if (heartbeatJSON["status"] === DOWN) {
                 let grafanadowndata = {
@@ -34,10 +30,7 @@ class GrafanaOncall extends NotificationProvider {
                     message: heartbeatJSON["msg"],
                     state: "alerting",
                 };
-                await axios.post(
-                    notification.GrafanaOncallURL,
-                    grafanadowndata
-                );
+                await axios.post(notification.GrafanaOncallURL, grafanadowndata);
                 return okMsg;
             } else if (heartbeatJSON["status"] === UP) {
                 let grafanaupdata = {
@@ -45,10 +38,7 @@ class GrafanaOncall extends NotificationProvider {
                     message: heartbeatJSON["msg"],
                     state: "ok",
                 };
-                await axios.post(
-                    notification.GrafanaOncallURL,
-                    grafanaupdata
-                );
+                await axios.post(notification.GrafanaOncallURL, grafanaupdata);
                 return okMsg;
             }
         } catch (error) {
diff --git a/server/notification-providers/heii-oncall.js b/server/notification-providers/heii-oncall.js
new file mode 100644
index 00000000..20b53e6a
--- /dev/null
+++ b/server/notification-providers/heii-oncall.js
@@ -0,0 +1,52 @@
+const { UP, DOWN, getMonitorRelativeURL } = require("../../src/util");
+const { setting } = require("../util-server");
+
+const NotificationProvider = require("./notification-provider");
+const axios = require("axios");
+class HeiiOnCall extends NotificationProvider {
+    name = "HeiiOnCall";
+
+    /**
+     * @inheritdoc
+     */
+    async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
+        const okMsg = "Sent Successfully.";
+        const payload = heartbeatJSON || {};
+
+        const baseURL = await setting("primaryBaseURL");
+        if (baseURL && monitorJSON) {
+            payload["url"] = baseURL + getMonitorRelativeURL(monitorJSON.id);
+        }
+
+        const config = {
+            headers: {
+                Accept: "application/json",
+                "Content-Type": "application/json",
+                Authorization: "Bearer " + notification.heiiOnCallApiKey,
+            },
+        };
+        const heiiUrl = `https://heiioncall.com/triggers/${notification.heiiOnCallTriggerId}/`;
+        // docs https://heiioncall.com/docs#manual-triggers
+        try {
+            if (!heartbeatJSON) {
+                // Testing or general notification like certificate expiry
+                payload["msg"] = msg;
+                await axios.post(heiiUrl + "alert", payload, config);
+                return okMsg;
+            }
+
+            if (heartbeatJSON.status === DOWN) {
+                await axios.post(heiiUrl + "alert", payload, config);
+                return okMsg;
+            }
+            if (heartbeatJSON.status === UP) {
+                await axios.post(heiiUrl + "resolve", payload, config);
+                return okMsg;
+            }
+        } catch (error) {
+            this.throwGeneralAxiosError(error);
+        }
+    }
+}
+
+module.exports = HeiiOnCall;
diff --git a/server/notification-providers/home-assistant.js b/server/notification-providers/home-assistant.js
index 292fc3e6..ee95ba0b 100644
--- a/server/notification-providers/home-assistant.js
+++ b/server/notification-providers/home-assistant.js
@@ -9,7 +9,9 @@ class HomeAssistant extends NotificationProvider {
     /**
      * @inheritdoc
      */
-    async send(notification, message, monitor = null, heartbeat = null) {
+    async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
+        const okMsg = "Sent Successfully.";
+
         const notificationService = notification?.notificationService || defaultNotificationService;
 
         try {
@@ -17,10 +19,10 @@ class HomeAssistant extends NotificationProvider {
                 `${notification.homeAssistantUrl.trim().replace(/\/*$/, "")}/api/services/notify/${notificationService}`,
                 {
                     title: "Uptime Kuma",
-                    message,
+                    message: msg,
                     ...(notificationService !== "persistent_notification" && { data: {
-                        name: monitor?.name,
-                        status: heartbeat?.status,
+                        name: monitorJSON?.name,
+                        status: heartbeatJSON?.status,
                     } }),
                 },
                 {
@@ -31,7 +33,7 @@ class HomeAssistant extends NotificationProvider {
                 }
             );
 
-            return "Sent Successfully.";
+            return okMsg;
         } catch (error) {
             this.throwGeneralAxiosError(error);
         }
diff --git a/server/notification-providers/kook.js b/server/notification-providers/kook.js
index b9b68f43..dab19513 100644
--- a/server/notification-providers/kook.js
+++ b/server/notification-providers/kook.js
@@ -2,15 +2,15 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class Kook extends NotificationProvider {
-
     name = "Kook";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
-        let url = "https://www.kookapp.cn/api/v3/message/create";
+        const okMsg = "Sent Successfully.";
+        const url = "https://www.kookapp.cn/api/v3/message/create";
+
         let data = {
             target_id: notification.kookGuildID,
             content: msg,
diff --git a/server/notification-providers/line.js b/server/notification-providers/line.js
index 73dc962f..57dc87e7 100644
--- a/server/notification-providers/line.js
+++ b/server/notification-providers/line.js
@@ -3,16 +3,16 @@ const axios = require("axios");
 const { DOWN, UP } = require("../../src/util");
 
 class Line extends NotificationProvider {
-
     name = "line";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+        const url = "https://api.line.me/v2/bot/message/push";
+
         try {
-            let lineAPIUrl = "https://api.line.me/v2/bot/message/push";
             let config = {
                 headers: {
                     "Content-Type": "application/json",
@@ -29,7 +29,7 @@ class Line extends NotificationProvider {
                         }
                     ]
                 };
-                await axios.post(lineAPIUrl, testMessage, config);
+                await axios.post(url, testMessage, config);
             } else if (heartbeatJSON["status"] === DOWN) {
                 let downMessage = {
                     "to": notification.lineUserID,
@@ -43,7 +43,7 @@ class Line extends NotificationProvider {
                         }
                     ]
                 };
-                await axios.post(lineAPIUrl, downMessage, config);
+                await axios.post(url, downMessage, config);
             } else if (heartbeatJSON["status"] === UP) {
                 let upMessage = {
                     "to": notification.lineUserID,
@@ -57,7 +57,7 @@ class Line extends NotificationProvider {
                         }
                     ]
                 };
-                await axios.post(lineAPIUrl, upMessage, config);
+                await axios.post(url, upMessage, config);
             }
             return okMsg;
         } catch (error) {
diff --git a/server/notification-providers/linenotify.js b/server/notification-providers/linenotify.js
index dfe7e598..2622e3f1 100644
--- a/server/notification-providers/linenotify.js
+++ b/server/notification-providers/linenotify.js
@@ -4,16 +4,16 @@ const qs = require("qs");
 const { DOWN, UP } = require("../../src/util");
 
 class LineNotify extends NotificationProvider {
-
     name = "LineNotify";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+        const url = "https://notify-api.line.me/api/notify";
+
         try {
-            let lineAPIUrl = "https://notify-api.line.me/api/notify";
             let config = {
                 headers: {
                     "Content-Type": "application/x-www-form-urlencoded",
@@ -24,7 +24,7 @@ class LineNotify extends NotificationProvider {
                 let testMessage = {
                     "message": msg,
                 };
-                await axios.post(lineAPIUrl, qs.stringify(testMessage), config);
+                await axios.post(url, qs.stringify(testMessage), config);
             } else if (heartbeatJSON["status"] === DOWN) {
                 let downMessage = {
                     "message": "\n[🔴 Down]\n" +
@@ -32,7 +32,7 @@ class LineNotify extends NotificationProvider {
                         heartbeatJSON["msg"] + "\n" +
                         `Time (${heartbeatJSON["timezone"]}): ${heartbeatJSON["localDateTime"]}`
                 };
-                await axios.post(lineAPIUrl, qs.stringify(downMessage), config);
+                await axios.post(url, qs.stringify(downMessage), config);
             } else if (heartbeatJSON["status"] === UP) {
                 let upMessage = {
                     "message": "\n[✅ Up]\n" +
@@ -40,7 +40,7 @@ class LineNotify extends NotificationProvider {
                         heartbeatJSON["msg"] + "\n" +
                         `Time (${heartbeatJSON["timezone"]}): ${heartbeatJSON["localDateTime"]}`
                 };
-                await axios.post(lineAPIUrl, qs.stringify(upMessage), config);
+                await axios.post(url, qs.stringify(upMessage), config);
             }
             return okMsg;
         } catch (error) {
diff --git a/server/notification-providers/lunasea.js b/server/notification-providers/lunasea.js
index 3729b0fe..787a704a 100644
--- a/server/notification-providers/lunasea.js
+++ b/server/notification-providers/lunasea.js
@@ -3,28 +3,23 @@ const axios = require("axios");
 const { DOWN, UP } = require("../../src/util");
 
 class LunaSea extends NotificationProvider {
-
     name = "lunasea";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
-        let lunaseaurl = "";
-        if (notification.lunaseaTarget === "user") {
-            lunaseaurl = "https://notify.lunasea.app/v1/custom/user/" + notification.lunaseaUserID;
-        } else {
-            lunaseaurl = "https://notify.lunasea.app/v1/custom/device/" + notification.lunaseaDevice;
-        }
+        const okMsg = "Sent Successfully.";
+        const url = "https://notify.lunasea.app/v1";
 
         try {
+            const target = this.getTarget(notification);
             if (heartbeatJSON == null) {
                 let testdata = {
                     "title": "Uptime Kuma Alert",
                     "body": msg,
                 };
-                await axios.post(lunaseaurl, testdata);
+                await axios.post(`${url}/custom/${target}`, testdata);
                 return okMsg;
             }
 
@@ -35,7 +30,7 @@ class LunaSea extends NotificationProvider {
                         heartbeatJSON["msg"] +
                         `\nTime (${heartbeatJSON["timezone"]}): ${heartbeatJSON["localDateTime"]}`
                 };
-                await axios.post(lunaseaurl, downdata);
+                await axios.post(`${url}/custom/${target}`, downdata);
                 return okMsg;
             }
 
@@ -46,13 +41,25 @@ class LunaSea extends NotificationProvider {
                         heartbeatJSON["msg"] +
                         `\nTime (${heartbeatJSON["timezone"]}): ${heartbeatJSON["localDateTime"]}`
                 };
-                await axios.post(lunaseaurl, updata);
+                await axios.post(`${url}/custom/${target}`, updata);
                 return okMsg;
             }
 
         } catch (error) {
             this.throwGeneralAxiosError(error);
         }
+    }
+
+    /**
+     * Generates the lunasea target to send the notification to
+     * @param {BeanModel} notification Notification details
+     * @returns {string} The target to send the notification to
+     */
+    getTarget(notification) {
+        if (notification.lunaseaTarget === "user") {
+            return "user/" + notification.lunaseaUserID;
+        }
+        return "device/" + notification.lunaseaDevice;
 
     }
 }
diff --git a/server/notification-providers/matrix.js b/server/notification-providers/matrix.js
index c9baf48b..805a4947 100644
--- a/server/notification-providers/matrix.js
+++ b/server/notification-providers/matrix.js
@@ -10,7 +10,7 @@ class Matrix extends NotificationProvider {
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         const size = 20;
         const randomString = encodeURIComponent(
diff --git a/server/notification-providers/mattermost.js b/server/notification-providers/mattermost.js
index 5a6a8e2c..9946d02b 100644
--- a/server/notification-providers/mattermost.js
+++ b/server/notification-providers/mattermost.js
@@ -3,14 +3,14 @@ const axios = require("axios");
 const { DOWN, UP } = require("../../src/util");
 
 class Mattermost extends NotificationProvider {
-
     name = "mattermost";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+
         try {
             const mattermostUserName = notification.mattermostusername || "Uptime Kuma";
             // If heartbeatJSON is null, assume non monitoring notification (Certificate warning) or testing.
@@ -98,10 +98,7 @@ class Mattermost extends NotificationProvider {
                     },
                 ],
             };
-            await axios.post(
-                notification.mattermostWebhookUrl,
-                mattermostdata
-            );
+            await axios.post(notification.mattermostWebhookUrl, mattermostdata);
             return okMsg;
         } catch (error) {
             this.throwGeneralAxiosError(error);
diff --git a/server/notification-providers/nostr.js b/server/notification-providers/nostr.js
index 9d93678f..453b86d0 100644
--- a/server/notification-providers/nostr.js
+++ b/server/notification-providers/nostr.js
@@ -107,7 +107,7 @@ class Nostr extends NotificationProvider {
     /**
      * Get public keys for recipients
      * @param {string} recipients Newline delimited list of recipients
-     * @returns {nip19.DecodeResult[]} Public keys
+     * @returns {Promise<nip19.DecodeResult[]>} Public keys
      */
     async getPublicKeys(recipients) {
         const recipientsList = recipients.split("\n");
diff --git a/server/notification-providers/ntfy.js b/server/notification-providers/ntfy.js
index 12c9258b..ad1d39f8 100644
--- a/server/notification-providers/ntfy.js
+++ b/server/notification-providers/ntfy.js
@@ -3,14 +3,14 @@ const axios = require("axios");
 const { DOWN, UP } = require("../../src/util");
 
 class Ntfy extends NotificationProvider {
-
     name = "ntfy";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+
         try {
             let headers = {};
             if (notification.ntfyAuthenticationMethod === "usernamePassword") {
@@ -31,7 +31,7 @@ class Ntfy extends NotificationProvider {
                     "priority": notification.ntfyPriority,
                     "tags": [ "test_tube" ],
                 };
-                await axios.post(`${notification.ntfyserverurl}`, ntfyTestData, { headers: headers });
+                await axios.post(notification.ntfyserverurl, ntfyTestData, { headers: headers });
                 return okMsg;
             }
             let tags = [];
@@ -70,7 +70,7 @@ class Ntfy extends NotificationProvider {
                 data.icon = notification.ntfyIcon;
             }
 
-            await axios.post(`${notification.ntfyserverurl}`, data, { headers: headers });
+            await axios.post(notification.ntfyserverurl, data, { headers: headers });
 
             return okMsg;
 
diff --git a/server/notification-providers/octopush.js b/server/notification-providers/octopush.js
index ec62cd3a..7576e0ad 100644
--- a/server/notification-providers/octopush.js
+++ b/server/notification-providers/octopush.js
@@ -2,14 +2,15 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class Octopush extends NotificationProvider {
-
     name = "octopush";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+        const urlV2 = "https://api.octopush.com/v1/public/sms-campaign/send";
+        const urlV1 = "https://www.octopush-dm.com/api/sms/json";
 
         try {
         // Default - V2
@@ -33,7 +34,7 @@ class Octopush extends NotificationProvider {
                     "purpose": "alert",
                     "sender": notification.octopushSenderName
                 };
-                await axios.post("https://api.octopush.com/v1/public/sms-campaign/send", data, config);
+                await axios.post(urlV2, data, config);
             } else if (notification.octopushVersion === "1") {
                 let data = {
                     "user_login": notification.octopushDMLogin,
@@ -55,7 +56,7 @@ class Octopush extends NotificationProvider {
 
                 // V1 API returns 200 even on error so we must check
                 // response data
-                let response = await axios.post("https://www.octopush-dm.com/api/sms/json", {}, config);
+                let response = await axios.post(urlV1, {}, config);
                 if ("error_code" in response.data) {
                     if (response.data.error_code !== "000") {
                         this.throwGeneralAxiosError(`Octopush error ${JSON.stringify(response.data)}`);
diff --git a/server/notification-providers/onebot.js b/server/notification-providers/onebot.js
index ec7fc46d..b04794de 100644
--- a/server/notification-providers/onebot.js
+++ b/server/notification-providers/onebot.js
@@ -2,23 +2,23 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class OneBot extends NotificationProvider {
-
     name = "OneBot";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+
         try {
-            let httpAddr = notification.httpAddr;
-            if (!httpAddr.startsWith("http")) {
-                httpAddr = "http://" + httpAddr;
+            let url = notification.httpAddr;
+            if (!url.startsWith("http")) {
+                url = "http://" + url;
             }
-            if (!httpAddr.endsWith("/")) {
-                httpAddr += "/";
+            if (!url.endsWith("/")) {
+                url += "/";
             }
-            let onebotAPIUrl = httpAddr + "send_msg";
+            url += "send_msg";
             let config = {
                 headers: {
                     "Content-Type": "application/json",
@@ -37,7 +37,7 @@ class OneBot extends NotificationProvider {
                 data["message_type"] = "private";
                 data["user_id"] = notification.recieverId;
             }
-            await axios.post(onebotAPIUrl, data, config);
+            await axios.post(url, data, config);
             return okMsg;
         } catch (error) {
             this.throwGeneralAxiosError(error);
diff --git a/server/notification-providers/opsgenie.js b/server/notification-providers/opsgenie.js
index e2dc38a7..59a79705 100644
--- a/server/notification-providers/opsgenie.js
+++ b/server/notification-providers/opsgenie.js
@@ -4,10 +4,9 @@ const { UP, DOWN } = require("../../src/util");
 
 const opsgenieAlertsUrlEU = "https://api.eu.opsgenie.com/v2/alerts";
 const opsgenieAlertsUrlUS = "https://api.opsgenie.com/v2/alerts";
-let okMsg = "Sent Successfully.";
+const okMsg = "Sent Successfully.";
 
 class Opsgenie extends NotificationProvider {
-
     name = "Opsgenie";
 
     /**
diff --git a/server/notification-providers/promosms.js b/server/notification-providers/promosms.js
index 7ec91971..05334e90 100644
--- a/server/notification-providers/promosms.js
+++ b/server/notification-providers/promosms.js
@@ -2,14 +2,14 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class PromoSMS extends NotificationProvider {
-
     name = "promosms";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+        const url = "https://promosms.com/api/rest/v3_2/sms";
 
         if (notification.promosmsAllowLongSMS === undefined) {
             notification.promosmsAllowLongSMS = false;
@@ -36,7 +36,7 @@ class PromoSMS extends NotificationProvider {
                 "sender": notification.promosmsSenderName
             };
 
-            let resp = await axios.post("https://promosms.com/api/rest/v3_2/sms", data, config);
+            let resp = await axios.post(url, data, config);
 
             if (resp.data.response.status !== 0) {
                 let error = "Something gone wrong. Api returned " + resp.data.response.status + ".";
diff --git a/server/notification-providers/pushbullet.js b/server/notification-providers/pushbullet.js
index 9fbd4d4c..0b730310 100644
--- a/server/notification-providers/pushbullet.js
+++ b/server/notification-providers/pushbullet.js
@@ -4,17 +4,16 @@ const axios = require("axios");
 const { DOWN, UP } = require("../../src/util");
 
 class Pushbullet extends NotificationProvider {
-
     name = "pushbullet";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+        const url = "https://api.pushbullet.com/v2/pushes";
 
         try {
-            let pushbulletUrl = "https://api.pushbullet.com/v2/pushes";
             let config = {
                 headers: {
                     "Access-Token": notification.pushbulletAccessToken,
@@ -27,7 +26,7 @@ class Pushbullet extends NotificationProvider {
                     "title": "Uptime Kuma Alert",
                     "body": msg,
                 };
-                await axios.post(pushbulletUrl, data, config);
+                await axios.post(url, data, config);
             } else if (heartbeatJSON["status"] === DOWN) {
                 let downData = {
                     "type": "note",
@@ -36,7 +35,7 @@ class Pushbullet extends NotificationProvider {
                         heartbeatJSON["msg"] +
                         `\nTime (${heartbeatJSON["timezone"]}): ${heartbeatJSON["localDateTime"]}`,
                 };
-                await axios.post(pushbulletUrl, downData, config);
+                await axios.post(url, downData, config);
             } else if (heartbeatJSON["status"] === UP) {
                 let upData = {
                     "type": "note",
@@ -45,7 +44,7 @@ class Pushbullet extends NotificationProvider {
                         heartbeatJSON["msg"] +
                         `\nTime (${heartbeatJSON["timezone"]}): ${heartbeatJSON["localDateTime"]}`,
                 };
-                await axios.post(pushbulletUrl, upData, config);
+                await axios.post(url, upData, config);
             }
             return okMsg;
         } catch (error) {
diff --git a/server/notification-providers/pushdeer.js b/server/notification-providers/pushdeer.js
index 78525a54..276c2f47 100644
--- a/server/notification-providers/pushdeer.js
+++ b/server/notification-providers/pushdeer.js
@@ -3,17 +3,15 @@ const axios = require("axios");
 const { DOWN, UP } = require("../../src/util");
 
 class PushDeer extends NotificationProvider {
-
     name = "PushDeer";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
-        let endpoint = "/message/push";
-        let serverUrl = notification.pushdeerServer || "https://api2.pushdeer.com";
-        let pushdeerlink = `${serverUrl.trim().replace(/\/*$/, "")}${endpoint}`;
+        const okMsg = "Sent Successfully.";
+        const serverUrl = notification.pushdeerServer || "https://api2.pushdeer.com";
+        const url = `${serverUrl.trim().replace(/\/*$/, "")}/message/push`;
 
         let valid = msg != null && monitorJSON != null && heartbeatJSON != null;
 
@@ -34,7 +32,7 @@ class PushDeer extends NotificationProvider {
         };
 
         try {
-            let res = await axios.post(pushdeerlink, data);
+            let res = await axios.post(url, data);
 
             if ("error" in res.data) {
                 let error = res.data.error;
diff --git a/server/notification-providers/pushover.js b/server/notification-providers/pushover.js
index 31f8d885..304aa351 100644
--- a/server/notification-providers/pushover.js
+++ b/server/notification-providers/pushover.js
@@ -2,15 +2,14 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class Pushover extends NotificationProvider {
-
     name = "pushover";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
-        let pushoverlink = "https://api.pushover.net/1/messages.json";
+        const okMsg = "Sent Successfully.";
+        const url = "https://api.pushover.net/1/messages.json";
 
         let data = {
             "message": msg,
@@ -33,11 +32,11 @@ class Pushover extends NotificationProvider {
 
         try {
             if (heartbeatJSON == null) {
-                await axios.post(pushoverlink, data);
+                await axios.post(url, data);
                 return okMsg;
             } else {
                 data.message += `\n<b>Time (${heartbeatJSON["timezone"]})</b>:${heartbeatJSON["localDateTime"]}`;
-                await axios.post(pushoverlink, data);
+                await axios.post(url, data);
                 return okMsg;
             }
         } catch (error) {
diff --git a/server/notification-providers/pushy.js b/server/notification-providers/pushy.js
index afb9e617..cb700229 100644
--- a/server/notification-providers/pushy.js
+++ b/server/notification-providers/pushy.js
@@ -2,14 +2,13 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class Pushy extends NotificationProvider {
-
     name = "pushy";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
             await axios.post(`https://api.pushy.me/push?api_key=${notification.pushyAPIKey}`, {
diff --git a/server/notification-providers/rocket-chat.js b/server/notification-providers/rocket-chat.js
index 13b39cde..690e33a8 100644
--- a/server/notification-providers/rocket-chat.js
+++ b/server/notification-providers/rocket-chat.js
@@ -5,14 +5,14 @@ const { setting } = require("../util-server");
 const { getMonitorRelativeURL, DOWN } = require("../../src/util");
 
 class RocketChat extends NotificationProvider {
-
     name = "rocket.chat";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+
         try {
             if (heartbeatJSON == null) {
                 let data = {
diff --git a/server/notification-providers/serverchan.js b/server/notification-providers/serverchan.js
index 2315e1c3..cefe61f1 100644
--- a/server/notification-providers/serverchan.js
+++ b/server/notification-providers/serverchan.js
@@ -3,14 +3,14 @@ const axios = require("axios");
 const { DOWN, UP } = require("../../src/util");
 
 class ServerChan extends NotificationProvider {
-
     name = "ServerChan";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+
         try {
             await axios.post(`https://sctapi.ftqq.com/${notification.serverChanSendKey}.send`, {
                 "title": this.checkStatus(heartbeatJSON, monitorJSON),
diff --git a/server/notification-providers/serwersms.js b/server/notification-providers/serwersms.js
index 76e1ef2c..f7c8644a 100644
--- a/server/notification-providers/serwersms.js
+++ b/server/notification-providers/serwersms.js
@@ -2,14 +2,14 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class SerwerSMS extends NotificationProvider {
-
     name = "serwersms";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+        const url = "https://api2.serwersms.pl/messages/send_sms";
 
         try {
             let config = {
@@ -25,7 +25,7 @@ class SerwerSMS extends NotificationProvider {
                 "sender": notification.serwersmsSenderName,
             };
 
-            let resp = await axios.post("https://api2.serwersms.pl/messages/send_sms", data, config);
+            let resp = await axios.post(url, data, config);
 
             if (!resp.data.success) {
                 if (resp.data.error) {
diff --git a/server/notification-providers/signal.js b/server/notification-providers/signal.js
index c445ee82..9702d06b 100644
--- a/server/notification-providers/signal.js
+++ b/server/notification-providers/signal.js
@@ -2,14 +2,13 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class Signal extends NotificationProvider {
-
     name = "signal";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
             let data = {
diff --git a/server/notification-providers/slack.js b/server/notification-providers/slack.js
index d512a7cd..9347b07c 100644
--- a/server/notification-providers/slack.js
+++ b/server/notification-providers/slack.js
@@ -4,7 +4,6 @@ const { setSettings, setting } = require("../util-server");
 const { getMonitorRelativeURL, UP } = require("../../src/util");
 
 class Slack extends NotificationProvider {
-
     name = "slack";
 
     /**
@@ -31,7 +30,7 @@ class Slack extends NotificationProvider {
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         if (notification.slackchannelnotify) {
             msg += " <!channel>";
diff --git a/server/notification-providers/smsc.js b/server/notification-providers/smsc.js
index 34d9c8fa..89f01d01 100644
--- a/server/notification-providers/smsc.js
+++ b/server/notification-providers/smsc.js
@@ -8,7 +8,9 @@ class SMSC extends NotificationProvider {
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+        const url = "https://smsc.kz/sys/send.php?";
+
         try {
             let config = {
                 headers: {
@@ -29,7 +31,7 @@ class SMSC extends NotificationProvider {
                 getArray.push("sender=" + notification.smscSenderName);
             }
 
-            let resp = await axios.get("https://smsc.kz/sys/send.php?" + getArray.join("&"), config);
+            let resp = await axios.get(url + getArray.join("&"), config);
             if (resp.data.id === undefined) {
                 let error = `Something gone wrong. Api returned code ${resp.data.error_code}: ${resp.data.error}`;
                 this.throwGeneralAxiosError(error);
diff --git a/server/notification-providers/smseagle.js b/server/notification-providers/smseagle.js
index 988f17fd..4e897006 100644
--- a/server/notification-providers/smseagle.js
+++ b/server/notification-providers/smseagle.js
@@ -2,14 +2,13 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class SMSEagle extends NotificationProvider {
-
     name = "SMSEagle";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
             let config = {
diff --git a/server/notification-providers/smsmanager.js b/server/notification-providers/smsmanager.js
index 7d55d410..d01285d8 100644
--- a/server/notification-providers/smsmanager.js
+++ b/server/notification-providers/smsmanager.js
@@ -2,23 +2,24 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class SMSManager extends NotificationProvider {
-
     name = "SMSManager";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
+        const okMsg = "Sent Successfully.";
+        const url = "https://http-api.smsmanager.cz/Send";
+
         try {
             let data = {
                 apikey: notification.smsmanagerApiKey,
-                endpoint: "https://http-api.smsmanager.cz/Send",
                 message: msg.replace(/[^\x00-\x7F]/g, ""),
-                to: notification.numbers,
-                messageType: notification.messageType,
+                number: notification.numbers,
+                gateway: notification.messageType,
             };
-            await axios.get(`${data.endpoint}?apikey=${data.apikey}&message=${data.message}&number=${data.to}&gateway=${data.messageType}`);
-            return "SMS sent sucessfully.";
+            await axios.get(`${url}?apikey=${data.apikey}&message=${data.message}&number=${data.number}&gateway=${data.messageType}`);
+            return okMsg;
         } catch (error) {
             this.throwGeneralAxiosError(error);
         }
diff --git a/server/notification-providers/smtp.js b/server/notification-providers/smtp.js
index 0e761bc0..b403117b 100644
--- a/server/notification-providers/smtp.js
+++ b/server/notification-providers/smtp.js
@@ -4,13 +4,13 @@ const { DOWN } = require("../../src/util");
 const { Liquid } = require("liquidjs");
 
 class SMTP extends NotificationProvider {
-
     name = "smtp";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
+        const okMsg = "Sent Successfully.";
 
         const config = {
             host: notification.smtpHost,
@@ -76,7 +76,7 @@ class SMTP extends NotificationProvider {
             text: body,
         });
 
-        return "Sent Successfully.";
+        return okMsg;
     }
 
     /**
diff --git a/server/notification-providers/squadcast.js b/server/notification-providers/squadcast.js
index 0b60503d..1c653d14 100644
--- a/server/notification-providers/squadcast.js
+++ b/server/notification-providers/squadcast.js
@@ -3,14 +3,13 @@ const axios = require("axios");
 const { DOWN } = require("../../src/util");
 
 class Squadcast extends NotificationProvider {
-
     name = "squadcast";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
 
diff --git a/server/notification-providers/stackfield.js b/server/notification-providers/stackfield.js
index 26c038ea..65a92459 100644
--- a/server/notification-providers/stackfield.js
+++ b/server/notification-providers/stackfield.js
@@ -4,14 +4,14 @@ const { setting } = require("../util-server");
 const { getMonitorRelativeURL } = require("../../src/util");
 
 class Stackfield extends NotificationProvider {
-
     name = "stackfield";
 
     /**
      * @inheritdoc
      */
-    async send(notification, msg, monitorJSON = null) {
-        let okMsg = "Sent Successfully.";
+    async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
+        const okMsg = "Sent Successfully.";
+
         try {
             // Stackfield message formatting: https://www.stackfield.com/help/formatting-messages-2001
 
diff --git a/server/notification-providers/teams.js b/server/notification-providers/teams.js
index bf2cd764..f34ba1ce 100644
--- a/server/notification-providers/teams.js
+++ b/server/notification-providers/teams.js
@@ -208,7 +208,7 @@ class Teams extends NotificationProvider {
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
             if (heartbeatJSON == null) {
diff --git a/server/notification-providers/techulus-push.js b/server/notification-providers/techulus-push.js
index bfd9503b..230897f3 100644
--- a/server/notification-providers/techulus-push.js
+++ b/server/notification-providers/techulus-push.js
@@ -2,14 +2,13 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class TechulusPush extends NotificationProvider {
-
     name = "PushByTechulus";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
             await axios.post(`https://push.techulus.com/api/v1/notify/${notification.pushAPIKey}`, {
diff --git a/server/notification-providers/telegram.js b/server/notification-providers/telegram.js
index 896b9e08..c5bbb190 100644
--- a/server/notification-providers/telegram.js
+++ b/server/notification-providers/telegram.js
@@ -2,14 +2,14 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class Telegram extends NotificationProvider {
-
     name = "telegram";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
+        const url = "https://api.telegram.org";
 
         try {
             let params = {
@@ -22,7 +22,7 @@ class Telegram extends NotificationProvider {
                 params.message_thread_id = notification.telegramMessageThreadID;
             }
 
-            await axios.get(`https://api.telegram.org/bot${notification.telegramBotToken}/sendMessage`, {
+            await axios.get(`${url}/bot${notification.telegramBotToken}/sendMessage`, {
                 params: params,
             });
             return okMsg;
diff --git a/server/notification-providers/twilio.js b/server/notification-providers/twilio.js
index 2abb38b9..c38a6d7e 100644
--- a/server/notification-providers/twilio.js
+++ b/server/notification-providers/twilio.js
@@ -2,26 +2,21 @@ const NotificationProvider = require("./notification-provider");
 const axios = require("axios");
 
 class Twilio extends NotificationProvider {
-
     name = "twilio";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
+        const okMsg = "Sent Successfully.";
 
-        let okMsg = "Sent Successfully.";
-
-        let accountSID = notification.twilioAccountSID;
-        let apiKey = notification.twilioApiKey ? notification.twilioApiKey : accountSID;
-        let authToken = notification.twilioAuthToken;
+        let apiKey = notification.twilioApiKey ? notification.twilioApiKey : notification.twilioAccountSID;
 
         try {
-
             let config = {
                 headers: {
                     "Content-Type": "application/x-www-form-urlencoded;charset=utf-8",
-                    "Authorization": "Basic " + Buffer.from(apiKey + ":" + authToken).toString("base64"),
+                    "Authorization": "Basic " + Buffer.from(apiKey + ":" + notification.twilioAuthToken).toString("base64"),
                 }
             };
 
@@ -30,9 +25,7 @@ class Twilio extends NotificationProvider {
             data.append("From", notification.twilioFromNumber);
             data.append("Body", msg);
 
-            let url = "https://api.twilio.com/2010-04-01/Accounts/" + accountSID + "/Messages.json";
-
-            await axios.post(url, data, config);
+            await axios.post(`https://api.twilio.com/2010-04-01/Accounts/${(notification.twilioAccountSID)}/Messages.json`, data, config);
 
             return okMsg;
         } catch (error) {
diff --git a/server/notification-providers/webhook.js b/server/notification-providers/webhook.js
index 597ef846..986986d4 100644
--- a/server/notification-providers/webhook.js
+++ b/server/notification-providers/webhook.js
@@ -4,14 +4,13 @@ const FormData = require("form-data");
 const { Liquid } = require("liquidjs");
 
 class Webhook extends NotificationProvider {
-
     name = "webhook";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
             let data = {
diff --git a/server/notification-providers/wecom.js b/server/notification-providers/wecom.js
index ea30b26d..03fa7c18 100644
--- a/server/notification-providers/wecom.js
+++ b/server/notification-providers/wecom.js
@@ -3,24 +3,22 @@ const axios = require("axios");
 const { DOWN, UP } = require("../../src/util");
 
 class WeCom extends NotificationProvider {
-
     name = "WeCom";
 
     /**
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
-            let WeComUrl = "https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=" + notification.weComBotKey;
             let config = {
                 headers: {
                     "Content-Type": "application/json"
                 }
             };
             let body = this.composeMessage(heartbeatJSON, msg);
-            await axios.post(WeComUrl, body, config);
+            await axios.post(`https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=${notification.weComBotKey}`, body, config);
             return okMsg;
         } catch (error) {
             this.throwGeneralAxiosError(error);
diff --git a/server/notification-providers/zoho-cliq.js b/server/notification-providers/zoho-cliq.js
index 08653e3d..10381c81 100644
--- a/server/notification-providers/zoho-cliq.js
+++ b/server/notification-providers/zoho-cliq.js
@@ -3,7 +3,6 @@ const axios = require("axios");
 const { DOWN, UP } = require("../../src/util");
 
 class ZohoCliq extends NotificationProvider {
-
     name = "ZohoCliq";
 
     /**
@@ -80,7 +79,7 @@ class ZohoCliq extends NotificationProvider {
      * @inheritdoc
      */
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
-        let okMsg = "Sent Successfully.";
+        const okMsg = "Sent Successfully.";
 
         try {
             if (heartbeatJSON == null) {
diff --git a/server/notification.js b/server/notification.js
index 5e76d6eb..5a412c6e 100644
--- a/server/notification.js
+++ b/server/notification.js
@@ -16,6 +16,7 @@ const Gorush = require("./notification-providers/gorush");
 const Gotify = require("./notification-providers/gotify");
 const GrafanaOncall = require("./notification-providers/grafana-oncall");
 const HomeAssistant = require("./notification-providers/home-assistant");
+const HeiiOnCall = require("./notification-providers/heii-oncall");
 const Kook = require("./notification-providers/kook");
 const Line = require("./notification-providers/line");
 const LineNotify = require("./notification-providers/linenotify");
@@ -87,6 +88,7 @@ class Notification {
             new Gotify(),
             new GrafanaOncall(),
             new HomeAssistant(),
+            new HeiiOnCall(),
             new Kook(),
             new Line(),
             new LineNotify(),
diff --git a/server/server.js b/server/server.js
index eeffb063..45732471 100644
--- a/server/server.js
+++ b/server/server.js
@@ -294,7 +294,7 @@ let needSetup = false;
     log.debug("server", "Adding socket handler");
     io.on("connection", async (socket) => {
 
-        sendInfo(socket, true);
+        await sendInfo(socket, true);
 
         if (needSetup) {
             log.info("server", "Redirect to setup page");
@@ -326,7 +326,7 @@ let needSetup = false;
                     }
 
                     log.debug("auth", "afterLogin");
-                    afterLogin(socket, user);
+                    await afterLogin(socket, user);
                     log.debug("auth", "afterLogin ok");
 
                     log.info("auth", `Successfully logged in user ${decoded.username}. IP=${clientIP}`);
@@ -382,7 +382,7 @@ let needSetup = false;
 
             if (user) {
                 if (user.twofa_status === 0) {
-                    afterLogin(socket, user);
+                    await afterLogin(socket, user);
 
                     log.info("auth", `Successfully logged in user ${data.username}. IP=${clientIP}`);
 
@@ -405,7 +405,7 @@ let needSetup = false;
                     let verify = notp.totp.verify(data.token, user.twofa_secret, twoFAVerifyOptions);
 
                     if (user.twofa_last_token !== data.token && verify) {
-                        afterLogin(socket, user);
+                        await afterLogin(socket, user);
 
                         await R.exec("UPDATE `user` SET twofa_last_token = ? WHERE id = ? ", [
                             data.token,
@@ -986,7 +986,7 @@ let needSetup = false;
                 log.info("manage", `Delete Monitor: ${monitorID} User ID: ${socket.userID}`);
 
                 if (monitorID in server.monitorList) {
-                    server.monitorList[monitorID].stop();
+                    await server.monitorList[monitorID].stop();
                     delete server.monitorList[monitorID];
                 }
 
@@ -1351,8 +1351,8 @@ let needSetup = false;
                     msgi18n: true,
                 });
 
-                sendInfo(socket);
-                server.sendMaintenanceList(socket);
+                await sendInfo(socket);
+                await server.sendMaintenanceList(socket);
 
             } catch (e) {
                 callback({
@@ -1532,7 +1532,7 @@ let needSetup = false;
         log.debug("auth", "check auto login");
         if (await setting("disableAuth")) {
             log.info("auth", "Disabled Auth: auto login to admin");
-            afterLogin(socket, await R.findOne("user"));
+            await afterLogin(socket, await R.findOne("user"));
             socket.emit("autoLogin");
         } else {
             log.debug("auth", "need auth");
@@ -1548,7 +1548,7 @@ let needSetup = false;
         process.exit(1);
     });
 
-    server.start();
+    await server.start();
 
     server.httpServer.listen(port, hostname, () => {
         if (hostname) {
@@ -1619,13 +1619,13 @@ async function afterLogin(socket, user) {
     socket.join(user.id);
 
     let monitorList = await server.sendMonitorList(socket);
-    sendInfo(socket);
-    server.sendMaintenanceList(socket);
-    sendNotificationList(socket);
-    sendProxyList(socket);
-    sendDockerHostList(socket);
-    sendAPIKeyList(socket);
-    sendRemoteBrowserList(socket);
+    await sendInfo(socket);
+    await server.sendMaintenanceList(socket);
+    await sendNotificationList(socket);
+    await sendProxyList(socket);
+    await sendDockerHostList(socket);
+    await sendAPIKeyList(socket);
+    await sendRemoteBrowserList(socket);
 
     await sleep(500);
 
@@ -1703,11 +1703,11 @@ async function startMonitor(userID, monitorID) {
     ]);
 
     if (monitor.id in server.monitorList) {
-        server.monitorList[monitor.id].stop();
+        await server.monitorList[monitor.id].stop();
     }
 
     server.monitorList[monitor.id] = monitor;
-    monitor.start(io);
+    await monitor.start(io);
 }
 
 /**
@@ -1737,7 +1737,7 @@ async function pauseMonitor(userID, monitorID) {
     ]);
 
     if (monitorID in server.monitorList) {
-        server.monitorList[monitorID].stop();
+        await server.monitorList[monitorID].stop();
         server.monitorList[monitorID].active = 0;
     }
 }
@@ -1754,7 +1754,7 @@ async function startMonitors() {
     }
 
     for (let monitor of list) {
-        monitor.start(io);
+        await monitor.start(io);
         // Give some delays, so all monitors won't make request at the same moment when just start the server.
         await sleep(getRandomInt(300, 1000));
     }
@@ -1775,7 +1775,7 @@ async function shutdownFunction(signal) {
     log.info("server", "Stopping all monitors");
     for (let id in server.monitorList) {
         let monitor = server.monitorList[id];
-        monitor.stop();
+        await monitor.stop();
     }
     await sleep(2000);
     await Database.close();
diff --git a/server/socket-handlers/database-socket-handler.js b/server/socket-handlers/database-socket-handler.js
index 8441520a..bcf34c90 100644
--- a/server/socket-handlers/database-socket-handler.js
+++ b/server/socket-handlers/database-socket-handler.js
@@ -27,7 +27,7 @@ module.exports = (socket) => {
     socket.on("shrinkDatabase", async (callback) => {
         try {
             checkLogin(socket);
-            Database.shrink();
+            await Database.shrink();
             callback({
                 ok: true,
             });
diff --git a/server/uptime-kuma-server.js b/server/uptime-kuma-server.js
index 2eec9c7c..bcf497b5 100644
--- a/server/uptime-kuma-server.js
+++ b/server/uptime-kuma-server.js
@@ -195,7 +195,7 @@ class UptimeKumaServer {
     /**
      * Send list of monitors to client
      * @param {Socket} socket Socket to send list on
-     * @returns {object} List of monitors
+     * @returns {Promise<object>} List of monitors
      */
     async sendMonitorList(socket) {
         let list = await this.getMonitorJSONList(socket.userID);
@@ -227,7 +227,7 @@ class UptimeKumaServer {
     /**
      * Send maintenance list to client
      * @param {Socket} socket Socket.io instance to send to
-     * @returns {object} Maintenance list
+     * @returns {Promise<object>} Maintenance list
      */
     async sendMaintenanceList(socket) {
         return await this.sendMaintenanceListByUserID(socket.userID);
@@ -236,7 +236,7 @@ class UptimeKumaServer {
     /**
      * Send list of maintenances to user
      * @param {number} userID User to send list to
-     * @returns {object} Maintenance list
+     * @returns {Promise<object>} Maintenance list
      */
     async sendMaintenanceListByUserID(userID) {
         let list = await this.getMaintenanceJSONList(userID);
diff --git a/src/components/NotificationDialog.vue b/src/components/NotificationDialog.vue
index 57a2fdf2..56580fbf 100644
--- a/src/components/NotificationDialog.vue
+++ b/src/components/NotificationDialog.vue
@@ -120,6 +120,7 @@ export default {
                 "gorush": "Gorush",
                 "gotify": "Gotify",
                 "GrafanaOncall": "Grafana Oncall",
+                "HeiiOnCall": "Heii On-Call",
                 "HomeAssistant": "Home Assistant",
                 "Kook": "Kook",
                 "line": "LINE Messenger",
diff --git a/src/components/TagEditDialog.vue b/src/components/TagEditDialog.vue
index b77967c7..77fce260 100644
--- a/src/components/TagEditDialog.vue
+++ b/src/components/TagEditDialog.vue
@@ -288,7 +288,7 @@ export default {
 
         /**
          * Submit tag and monitorTag changes to server
-         * @returns {void}
+         * @returns {Promise<void>}
          */
         async submit() {
             this.processing = true;
@@ -348,7 +348,7 @@ export default {
 
         /**
          * Delete the editing tag from server
-         * @returns {void}
+         * @returns {Promise<void>}
          */
         async deleteTag() {
             this.processing = true;
diff --git a/src/components/TagsManager.vue b/src/components/TagsManager.vue
index 37e0ca4e..6b77b1c3 100644
--- a/src/components/TagsManager.vue
+++ b/src/components/TagsManager.vue
@@ -384,7 +384,7 @@ export default {
         /**
          * Submit the form data
          * @param {number} monitorId ID of monitor this change affects
-         * @returns {void}
+         * @returns {Promise<void>}
          */
         async submit(monitorId) {
             console.log(`Submitting tag changes for monitor ${monitorId}...`);
diff --git a/src/components/notifications/HeiiOnCall.vue b/src/components/notifications/HeiiOnCall.vue
new file mode 100644
index 00000000..a61c1c32
--- /dev/null
+++ b/src/components/notifications/HeiiOnCall.vue
@@ -0,0 +1,34 @@
+<template>
+    <div class="mb-3">
+        <label for="heiioncall-apikey" class="form-label">{{ $t("API Key") }}<span
+            style="color: red;"
+        ><sup>*</sup></span></label>
+        <HiddenInput
+            id="heiioncall-apikey" v-model="$parent.notification.heiiOnCallApiKey" required="true"
+            autocomplete="false"
+        ></HiddenInput>
+    </div>
+    <div class="mb-3">
+        <label for="heiioncall-trigger-id" class="form-label">Trigger ID<span
+            style="color: red;"
+        ><sup>*</sup></span></label>
+        <HiddenInput
+            id="heiioncall-trigger-id" v-model="$parent.notification.heiiOnCallTriggerId" required="true"
+            autocomplete="false"
+        ></HiddenInput>
+    </div>
+    <i18n-t tag="p" keypath="wayToGetHeiiOnCallDetails" class="form-text mt-3">
+        <template #documentation>
+            <a href="https://heiioncall.com/docs" target="_blank">{{ $t("documentationOf", ["Heii On-Call"]) }}</a>
+        </template>
+    </i18n-t>
+</template>
+
+<script>
+import HiddenInput from "../HiddenInput.vue";
+export default {
+    components: {
+        HiddenInput,
+    },
+};
+</script>
diff --git a/src/components/notifications/Telegram.vue b/src/components/notifications/Telegram.vue
index 40473e93..a072c3ed 100644
--- a/src/components/notifications/Telegram.vue
+++ b/src/components/notifications/Telegram.vue
@@ -85,7 +85,7 @@ export default {
 
         /**
          * Get the telegram chat ID
-         * @returns {void}
+         * @returns {Promise<void>}
          * @throws The chat ID could not be found
          */
         async autoGetTelegramChatID() {
diff --git a/src/components/notifications/index.js b/src/components/notifications/index.js
index 0606d41a..6cb0c9fd 100644
--- a/src/components/notifications/index.js
+++ b/src/components/notifications/index.js
@@ -14,6 +14,7 @@ import Gorush from "./Gorush.vue";
 import Gotify from "./Gotify.vue";
 import GrafanaOncall from "./GrafanaOncall.vue";
 import HomeAssistant from "./HomeAssistant.vue";
+import HeiiOnCall from "./HeiiOnCall.vue";
 import Kook from "./Kook.vue";
 import Line from "./Line.vue";
 import LineNotify from "./LineNotify.vue";
@@ -74,6 +75,7 @@ const NotificationFormList = {
     "gotify": Gotify,
     "GrafanaOncall": GrafanaOncall,
     "HomeAssistant": HomeAssistant,
+    "HeiiOnCall": HeiiOnCall,
     "Kook": Kook,
     "line": Line,
     "LineNotify": LineNotify,
diff --git a/src/lang/en.json b/src/lang/en.json
index 21828bdb..11190a08 100644
--- a/src/lang/en.json
+++ b/src/lang/en.json
@@ -885,5 +885,7 @@
     "deleteRemoteBrowserMessage": "Are you sure want to delete this Remote Browser for all monitors?",
     "GrafanaOncallUrl": "Grafana Oncall URL",
     "Browser Screenshot": "Browser Screenshot",
-    "What is a Remote Browser?": "What is a Remote Browser?"
+    "What is a Remote Browser?": "What is a Remote Browser?",
+    "wayToGetHeiiOnCallDetails": "How to get the Trigger ID and API Keys is explained in the {documentation}",
+    "documentationOf": "{0} Documentation"
 }
diff --git a/src/pages/EditMonitor.vue b/src/pages/EditMonitor.vue
index 72cb181e..e9f3ac83 100644
--- a/src/pages/EditMonitor.vue
+++ b/src/pages/EditMonitor.vue
@@ -1470,7 +1470,7 @@ message HealthCheckResponse {
 
         /**
          * Submit the form data for processing
-         * @returns {void}
+         * @returns {Promise<void>}
          */
         async submit() {
 
@@ -1535,7 +1535,7 @@ message HealthCheckResponse {
 
                         // Start the new parent monitor after edit is done
                         if (createdNewParent) {
-                            this.startParentGroupMonitor();
+                            await this.startParentGroupMonitor();
                         }
                         this.processing = false;
                         this.$root.getMonitorList();