*/Server.ts: Add monitoring init hook

package.json

@@ -115,6 +115,7 @@
         "pg-query-stream": "^4.15.0",
         "picocolors": "^1.1.1",
         "probe-image-size": "^7.3.0",
+        "prom-client": "^15.1.3",
         "reflect-metadata": "^0.2.2",
         "tslib": "^2.8.1",
         "typeorm": "^0.3.30",

src/api/Server.ts

@@ -53,7 +53,6 @@ export class SpacebarServer extends Server {
 
     async start() {
         await Monitoring.init();
-        Monitoring.attach(this.app);
         await initDatabase();
         await Config.init();
         await initEvent();

src/cdn/Server.ts

@@ -37,7 +37,6 @@ export class CDNServer extends Server {
 
     async start() {
         await Monitoring.init();
-        Monitoring.attach(this.app);
         await initDatabase();
         await Config.init();
 

src/util/monitoring/Monitoring.ts

@@ -0,0 +1,38 @@
+/*
+	Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
+	Copyright (C) 2026 Spacebar and Spacebar Contributors
+	
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Affero General Public License as published
+	by the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+	
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Affero General Public License for more details.
+	
+	You should have received a copy of the GNU Affero General Public License
+	along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import * as client from "prom-client";
+import { Router } from "express";
+
+export class Monitoring {
+    static isInitialised = false;
+    public static async init() {
+        if (Monitoring.isInitialised) return;
+        console.log("[Monitoring] Initialising prometheus metrics");
+        client.collectDefaultMetrics();
+        Monitoring.isInitialised = true;
+    }
+
+    public static attach(router: Router) {
+        router.get("/metrics", async (req, res) => {
+            res.setHeader("Content-Type", client.register.contentType);
+            const metrics = await client.register.metrics();
+            res.send(metrics);
+        });
+    }
+}