diff --git a/src/api/middlewares/Authentication.ts b/src/api/middlewares/Authentication.ts
new file mode 100644
index 00000000..6d063953
--- /dev/null
+++ b/src/api/middlewares/Authentication.ts
@@ -0,0 +1,71 @@
+import { checkToken, Config, HTTPError, Rights } from "@fosscord/util";
+import { NextFunction, Request, Response } from "express";
+
+export const NO_AUTHORIZATION_ROUTES = [
+ // Authentication routes
+ "/auth/login",
+ "/auth/register",
+ "/auth/location-metadata",
+ "/auth/mfa/totp",
+ // Routes with a seperate auth system
+ "/webhooks/",
+ // Public information endpoints
+ "/ping",
+ "/gateway",
+ "/experiments",
+ "/updates",
+ "/downloads/",
+ "/scheduled-maintenances/upcoming.json",
+ // Public kubernetes integration
+ "/-/readyz",
+ "/-/healthz",
+ // Client analytics
+ "/science",
+ "/track",
+ // Public policy pages
+ "/policies/instance",
+ // Asset delivery
+ /\/guilds\/\d+\/widget\.(json|png)/
+];
+
+export const API_PREFIX = /^\/api(\/v\d+)?/;
+export const API_PREFIX_TRAILING_SLASH = /^\/api(\/v\d+)?\//;
+
+declare global {
+ namespace Express {
+ interface Request {
+ user_id: string;
+ user_bot: boolean;
+ token: string;
+ rights: Rights;
+ }
+ }
+}
+
+export async function Authentication(req: Request, res: Response, next: NextFunction) {
+ if (req.method === "OPTIONS") return res.sendStatus(204);
+ const url = req.url.replace(API_PREFIX, "");
+ if (url.startsWith("/invites") && req.method === "GET") return next();
+ if (
+ NO_AUTHORIZATION_ROUTES.some((x) => {
+ if (typeof x === "string") return url.startsWith(x);
+ return x.test(url);
+ })
+ )
+ return next();
+ if (!req.headers.authorization) return next(new HTTPError("Missing Authorization Header", 401));
+
+ try {
+ const { jwtSecret } = Config.get().security;
+
+ const { decoded, user }: any = await checkToken(req.headers.authorization, jwtSecret);
+
+ req.token = decoded;
+ req.user_id = decoded.id;
+ req.user_bot = user.bot;
+ req.rights = new Rights(Number(user.rights));
+ return next();
+ } catch (error: any) {
+ return next(new HTTPError(error?.toString(), 400));
+ }
+}
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