diff --git a/packages/cli/src/UserManagement/controllers/AuthController.ts b/packages/cli/src/UserManagement/controllers/AuthController.ts
index af7ed4495d872..55f9cae4c31d6 100644
--- a/packages/cli/src/UserManagement/controllers/AuthController.ts
+++ b/packages/cli/src/UserManagement/controllers/AuthController.ts
@@ -15,7 +15,7 @@ import type { LoginRequest, UserRequest } from '../../requests';
 import { compareHash, sanitizeUser } from '../UserManagementHelper';
 import * as config from '../../../config';
 
-@RestController()
+@RestController('/')
 export class AuthController {
 	/**
 	 * Log in a user.
diff --git a/packages/cli/src/UserManagement/controllers/MeController.ts b/packages/cli/src/UserManagement/controllers/MeController.ts
index 737cceb849dce..73b90b23d3fd7 100644
--- a/packages/cli/src/UserManagement/controllers/MeController.ts
+++ b/packages/cli/src/UserManagement/controllers/MeController.ts
@@ -17,7 +17,7 @@ export class MeController {
 	/**
 	 * Return the logged-in user.
 	 */
-	@Get()
+	@Get('/')
 	async getCurrentUser(req: AuthenticatedRequest): Promise<PublicUser> {
 		return sanitizeUser(req.user);
 	}
@@ -25,7 +25,7 @@ export class MeController {
 	/**
 	 * Update the logged-in user's settings, except password.
 	 */
-	@Patch()
+	@Patch('/')
 	async updateCurrentUser(req: MeRequest.Settings, res: Response): Promise<PublicUser> {
 		const { email } = req.body;
 		if (!email) {
diff --git a/packages/cli/src/UserManagement/controllers/OwnerController.ts b/packages/cli/src/UserManagement/controllers/OwnerController.ts
index 53debbf8ba61f..4cff3cab03ac1 100644
--- a/packages/cli/src/UserManagement/controllers/OwnerController.ts
+++ b/packages/cli/src/UserManagement/controllers/OwnerController.ts
@@ -16,7 +16,7 @@ export class OwnerController {
 	 * Promote a shell into the owner of the n8n instance,
 	 * and enable `isInstanceOwnerSetUp` setting.
 	 */
-	@Post()
+	@Post('/')
 	async promoteOwner(req: OwnerRequest.Post, res: Response) {
 		const { email, firstName, lastName, password } = req.body;
 		const { id: userId } = req.user;
diff --git a/packages/cli/src/UserManagement/controllers/PasswordResetController.ts b/packages/cli/src/UserManagement/controllers/PasswordResetController.ts
index 57d3a34741eee..a9c58ab64f0b4 100644
--- a/packages/cli/src/UserManagement/controllers/PasswordResetController.ts
+++ b/packages/cli/src/UserManagement/controllers/PasswordResetController.ts
@@ -12,7 +12,7 @@ import { Db, ResponseHelper, InternalHooksManager } from '../..';
 import { issueCookie } from '../auth/jwt';
 import * as config from '../../../config';
 
-@RestController()
+@RestController('/')
 export class PasswordResetController {
 	/**
 	 * Send a password reset email.
diff --git a/packages/cli/src/UserManagement/controllers/UserController.ts b/packages/cli/src/UserManagement/controllers/UserController.ts
index c4a8d275ceb36..7aa90a117902f 100644
--- a/packages/cli/src/UserManagement/controllers/UserController.ts
+++ b/packages/cli/src/UserManagement/controllers/UserController.ts
@@ -27,7 +27,7 @@ export class UserController {
 	/**
 	 * Send email invite(s) to one or multiple users and create user shell(s).
 	 */
-	@Post()
+	@Post('/')
 	async sendEmailInvites(req: UserRequest.Invite) {
 		if (config.getEnv('userManagement.emails.mode') === '') {
 			Logger.debug(
@@ -288,7 +288,7 @@ export class UserController {
 		return sanitizeUser(updatedUser);
 	}
 
-	@Get()
+	@Get('/')
 	async listUsers() {
 		const users = await Db.collections.User.find({ relations: ['globalRole'] });
 		return users.map((user) => sanitizeUser(user, ['personalizationAnswers']));
diff --git a/packages/cli/src/UserManagement/decorators.ts b/packages/cli/src/UserManagement/decorators.ts
index 8ceeb5c60f761..12421133fb548 100644
--- a/packages/cli/src/UserManagement/decorators.ts
+++ b/packages/cli/src/UserManagement/decorators.ts
@@ -16,17 +16,17 @@ const Keys = {
 	BASE_PATH: Symbol('base_path'),
 } as const;
 
-type Method = 'get' | 'post' | 'patch' | 'delete';
+type Method = 'get' | 'post' | 'patch' | 'put' | 'delete';
 
 export const RestController =
-	(basePath: `/${string}` = '/'): ClassDecorator =>
+	(basePath: `/${string}`): ClassDecorator =>
 	(target: object) => {
 		Reflect.defineMetadata(Keys.BASE_PATH, basePath, target);
 	};
 
 const RouteFactory =
 	(...methods: Method[]) =>
-	(path: `/${string}` = '/'): MethodDecorator =>
+	(path: `/${string}`): MethodDecorator =>
 	(target, handlerName) => {
 		const ControllerClass = target.constructor;
 		const routes: RouteMetadata[] = Reflect.getMetadata(Keys.ROUTES, ControllerClass) ?? [];
@@ -40,6 +40,7 @@ const RouteFactory =
 export const Get = RouteFactory('get');
 export const Post = RouteFactory('post');
 export const Patch = RouteFactory('patch');
+export const Put = RouteFactory('put');
 export const Delete = RouteFactory('delete');
 
 type RequestHandler = (req: Request, res: Response) => Promise<unknown>;
@@ -55,7 +56,7 @@ export const registerController = <T>(
 ): void => {
 	const instance = new ControllerClass() as unknown as Record<string, RequestHandler>;
 	const routes: RouteMetadata[] = Reflect.getMetadata(Keys.ROUTES, ControllerClass);
-	if (routes.length > 0) {
+	if (routes.length) {
 		const router = Router({ mergeParams: true });
 		const restEndpoint: string = config.getEnv('endpoints.rest');
 		const basePath: string = Reflect.getMetadata(Keys.BASE_PATH, ControllerClass);
diff --git a/packages/cli/test/integration/shared/utils.ts b/packages/cli/test/integration/shared/utils.ts
index cb90403feadd8..c1ca312529fd9 100644
--- a/packages/cli/test/integration/shared/utils.ts
+++ b/packages/cli/test/integration/shared/utils.ts
@@ -96,7 +96,7 @@ export async function initTestServer({
 		testServer.externalHooks = ExternalHooks();
 	}
 
-	const [routerEndpoints, functionEndpoints] = classifyEndpointGroups(endpointGroups);
+	const [routerEndpoints] = classifyEndpointGroups(endpointGroups);
 
 	if (routerEndpoints.length) {
 		const { apiRouters } = await loadPublicApiVersions(testServer.publicApiEndpoint);
@@ -116,13 +116,11 @@ export async function initTestServer({
 		}
 	}
 
-	if (functionEndpoints.length) {
-		registerController(testServer.app, MeController);
-		registerController(testServer.app, UserController);
-		registerController(testServer.app, AuthController);
-		registerController(testServer.app, OwnerController);
-		registerController(testServer.app, PasswordResetController);
-	}
+	registerController(testServer.app, MeController);
+	registerController(testServer.app, UserController);
+	registerController(testServer.app, AuthController);
+	registerController(testServer.app, OwnerController);
+	registerController(testServer.app, PasswordResetController);
 
 	return testServer.app;
 }
@@ -137,20 +135,18 @@ export function initTestTelemetry() {
 }
 
 /**
- * Classify endpoint groups into `routerEndpoints` (newest, using `express.Router`),
- * and `functionEndpoints` (legacy, namespaced inside a function).
+ * Identify endpoint groups as `routerEndpoints` (newest, using `express.Router`)
  */
 const classifyEndpointGroups = (endpointGroups: string[]) => {
 	const routerEndpoints: string[] = [];
-	const functionEndpoints: string[] = [];
 
 	const ROUTER_GROUP = ['credentials', 'nodes', 'workflows', 'publicApi'];
 
 	endpointGroups.forEach((group) =>
-		(ROUTER_GROUP.includes(group) ? routerEndpoints : functionEndpoints).push(group),
+		ROUTER_GROUP.includes(group) && routerEndpoints.push(group),
 	);
 
-	return [routerEndpoints, functionEndpoints];
+	return [routerEndpoints];
 };
 
 // ----------------------------------