diff --git a/public/openapi/read.yaml b/public/openapi/read.yaml
index 1e1b721d6f..7c4e1f9e97 100644
--- a/public/openapi/read.yaml
+++ b/public/openapi/read.yaml
@@ -168,6 +168,8 @@ paths:
     $ref: 'read/admin/upload/file.yaml'
   /api/admin/uploadDefaultAvatar:
     $ref: 'read/admin/uploadDefaultAvatar.yaml'
+  /api/admin/config:
+    $ref: 'read/admin/config.yaml'
   /api/config:
     $ref: 'read/config.yaml'
   /api/users:
diff --git a/public/openapi/read/admin/config.yaml b/public/openapi/read/admin/config.yaml
new file mode 100644
index 0000000000..61e035d2fe
--- /dev/null
+++ b/public/openapi/read/admin/config.yaml
@@ -0,0 +1,290 @@
+get:
+  tags:
+    - admin
+  summary: Get forum settings and admin only settings
+  description: This route retrieves forum settings and user-specific settings for client-side and admin-side options on the forum.
+  responses:
+    "200":
+      description: ""
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              relative_path:
+                type: string
+              upload_url:
+                type: string
+              assetBaseUrl:
+                type: string
+              asset_base_url:
+                type: string
+              siteTitle:
+                type: string
+              browserTitle:
+                type: string
+              titleLayout:
+                type: string
+              showSiteTitle:
+                type: boolean
+              maintenanceMode:
+                type: boolean
+              postQueue:
+                type: number
+              minimumTitleLength:
+                type: number
+              maximumTitleLength:
+                type: number
+              minimumPostLength:
+                type: number
+              maximumPostLength:
+                type: number
+              minimumTagsPerTopic:
+                type: number
+              maximumTagsPerTopic:
+                type: number
+              minimumTagLength:
+                type: number
+              undoTimeout:
+                type: number
+              maximumTagLength:
+                type: number
+              useOutgoingLinksPage:
+                type: boolean
+              allowGuestHandles:
+                type: boolean
+              allowTopicsThumbnail:
+                type: boolean
+              usePagination:
+                type: boolean
+              disableChat:
+                type: boolean
+              disableChatMessageEditing:
+                type: boolean
+              maximumChatMessageLength:
+                type: number
+              socketioTransports:
+                type: array
+                items:
+                  type: string
+              socketioOrigins:
+                type: string
+              websocketAddress:
+                type: string
+              maxReconnectionAttempts:
+                type: number
+              reconnectionDelay:
+                type: number
+              topicsPerPage:
+                type: number
+              postsPerPage:
+                type: number
+              maximumFileSize:
+                type: number
+              theme:id:
+                type: string
+              theme:src:
+                type: string
+              defaultLang:
+                type: string
+              userLang:
+                type: string
+              loggedIn:
+                type: boolean
+              uid:
+                type: number
+                description: A user identifier
+              cache-buster:
+                type: string
+              topicPostSort:
+                type: string
+              categoryTopicSort:
+                type: string
+              csrf_token:
+                type: string
+              searchEnabled:
+                type: boolean
+              searchDefaultInQuick:
+                type: string
+              disableCustomUserSkins:
+                type: boolean
+              bootswatchSkin:
+                type: string
+              defaultBootswatchSkin:
+                type: string
+              composer:showHelpTab:
+                type: boolean
+              enablePostHistory:
+                type: boolean
+              timeagoCutoff:
+                type: number
+              timeagoCodes:
+                type: array
+                items:
+                  type: string
+              cookies:
+                type: object
+                properties:
+                  enabled:
+                    type: boolean
+                  message:
+                    type: string
+                  dismiss:
+                    type: string
+                  link:
+                    type: string
+                  link_url:
+                    type: string
+              thumbs:
+                type: object
+                properties:
+                  size:
+                    type: number
+              acpLang:
+                type: string
+              openOutgoingLinksInNewTab:
+                type: boolean
+              topicSearchEnabled:
+                type: boolean
+              hideSubCategories:
+                type: boolean
+              hideCategoryLastPost:
+                type: boolean
+              enableQuickReply:
+                type: boolean
+              iconBackgrounds:
+                type: array
+                items:
+                  type: string
+                  description: A valid CSS colour code
+                  example: '#fff'
+              emailPrompt:
+                type: number
+              useragent:
+                type: object
+                properties:
+                  isYaBrowser:
+                    type: boolean
+                  isAuthoritative:
+                    type: boolean
+                  isMobile:
+                    type: boolean
+                  isMobileNative:
+                    type: boolean
+                  isTablet:
+                    type: boolean
+                  isiPad:
+                    type: boolean
+                  isiPod:
+                    type: boolean
+                  isiPhone:
+                    type: boolean
+                  isiPhoneNative:
+                    type: boolean
+                  isAndroid:
+                    type: boolean
+                  isAndroidNative:
+                    type: boolean
+                  isBlackberry:
+                    type: boolean
+                  isOpera:
+                    type: boolean
+                  isIE:
+                    type: boolean
+                  isEdge:
+                    type: boolean
+                  isIECompatibilityMode:
+                    type: boolean
+                  isSafari:
+                    type: boolean
+                  isFirefox:
+                    type: boolean
+                  isWebkit:
+                    type: boolean
+                  isChrome:
+                    type: boolean
+                  isKonqueror:
+                    type: boolean
+                  isOmniWeb:
+                    type: boolean
+                  isSeaMonkey:
+                    type: boolean
+                  isFlock:
+                    type: boolean
+                  isAmaya:
+                    type: boolean
+                  isPhantomJS:
+                    type: boolean
+                  isEpiphany:
+                    type: boolean
+                  isDesktop:
+                    type: boolean
+                  isWindows:
+                    type: boolean
+                  isLinux:
+                    type: boolean
+                  isLinux64:
+                    type: boolean
+                  isMac:
+                    type: boolean
+                  isChromeOS:
+                    type: boolean
+                  isBada:
+                    type: boolean
+                  isSamsung:
+                    type: boolean
+                  isRaspberry:
+                    type: boolean
+                  isBot:
+                    type: boolean
+                  isCurl:
+                    type: boolean
+                  isAndroidTablet:
+                    type: boolean
+                  isWinJs:
+                    type: boolean
+                  isKindleFire:
+                    type: boolean
+                  isSilk:
+                    type: boolean
+                  isCaptive:
+                    type: boolean
+                  isSmartTV:
+                    type: boolean
+                  isUC:
+                    type: boolean
+                  isFacebook:
+                    type: boolean
+                  isAlamoFire:
+                    type: boolean
+                  isElectron:
+                    type: boolean
+                  silkAccelerated:
+                    type: boolean
+                  browser:
+                    type: string
+                  version:
+                    type: string
+                  os:
+                    type: string
+                  platform:
+                    type: string
+                  geoIp:
+                    type: object
+                  source:
+                    type: string
+                  isWechat:
+                    type: boolean
+              composer-default:
+                type: object
+              fontawesome:
+                type: object
+                properties:
+                  pro:
+                    type: boolean
+                  styles:
+                    type: array
+                    items:
+                      type: string
+                  version:
+                    type: string
diff --git a/public/openapi/read/config.yaml b/public/openapi/read/config.yaml
index 69520e29a3..ceb99c0d58 100644
--- a/public/openapi/read/config.yaml
+++ b/public/openapi/read/config.yaml
@@ -94,9 +94,6 @@ get:
               uid:
                 type: number
                 description: A user identifier
-              isACP:
-                type: boolean
-                description: true if admin page is being loaded, false otherwise
               cache-buster:
                 type: string
               topicPostSort:
diff --git a/src/controllers/admin.js b/src/controllers/admin.js
index c56c8f2ed8..b167f606e6 100644
--- a/src/controllers/admin.js
+++ b/src/controllers/admin.js
@@ -1,7 +1,9 @@
 'use strict';
 
 const privileges = require('../privileges');
+const plugins = require('../plugins');
 const helpers = require('./helpers');
+const apiController = require('./api');
 
 const adminController = {
 	dashboard: require('./admin/dashboard'),
@@ -55,4 +57,15 @@ adminController.routeIndex = async (req, res) => {
 	return helpers.notAllowed(req, res);
 };
 
+adminController.loadConfig = async function (req) {
+	const config = await apiController.loadConfig(req);
+	await plugins.hooks.fire('filter:config.get.admin', config);
+	return config;
+};
+
+adminController.getConfig = async (req, res) => {
+	const config = await adminController.loadConfig(req);
+	res.json(config);
+};
+
 module.exports = adminController;
diff --git a/src/controllers/api.js b/src/controllers/api.js
index 7c575b6070..22574a9ce6 100644
--- a/src/controllers/api.js
+++ b/src/controllers/api.js
@@ -67,7 +67,6 @@ apiController.loadConfig = async function (req) {
 		userLang: req.query.lang ? validator.escape(String(req.query.lang)) : (meta.config.defaultLang || 'en-GB'),
 		loggedIn: !!req.user,
 		uid: req.uid,
-		isACP: !!(req.res && req.res.locals && req.res.locals.renderAdminHeader),
 		'cache-buster': meta.config['cache-buster'] || '',
 		topicPostSort: meta.config.topicPostSort || 'oldest_to_newest',
 		categoryTopicSort: meta.config.categoryTopicSort || 'recently_replied',
diff --git a/src/middleware/admin.js b/src/middleware/admin.js
index b514fb5cca..bf89079103 100644
--- a/src/middleware/admin.js
+++ b/src/middleware/admin.js
@@ -10,7 +10,7 @@ const privileges = require('../privileges');
 const helpers = require('./helpers');
 
 const controllers = {
-	api: require('../controllers/api'),
+	admin: require('../controllers/admin'),
 	helpers: require('../controllers/helpers'),
 };
 
@@ -22,7 +22,7 @@ middleware.buildHeader = helpers.try(async (req, res, next) => {
 		await require('./index').applyCSRFasync(req, res);
 	}
 
-	res.locals.config = await controllers.api.loadConfig(req);
+	res.locals.config = await controllers.admin.loadConfig(req);
 	next();
 });
 
diff --git a/src/promisify.js b/src/promisify.js
index da6aad1fd2..47b2f3a9f4 100644
--- a/src/promisify.js
+++ b/src/promisify.js
@@ -37,7 +37,7 @@ module.exports = function (theModule, ignoreKeys) {
 	}
 
 	function wrapCallback(origFn, callbackFn) {
-		return async function wrapperCallback(...args) {
+		return function wrapperCallback(...args) {
 			if (args.length && typeof args[args.length - 1] === 'function') {
 				const cb = args.pop();
 				args.push((err, res) => (res !== undefined ? cb(err, res) : cb(err)));
diff --git a/src/routes/admin.js b/src/routes/admin.js
index 01e228dabe..6e6721c13e 100644
--- a/src/routes/admin.js
+++ b/src/routes/admin.js
@@ -61,6 +61,7 @@ module.exports = function (app, name, middleware, controllers) {
 
 
 function apiRoutes(router, name, middleware, controllers) {
+	router.get(`/api/${name}/config`, middleware.ensureLoggedIn, helpers.tryRoute(controllers.admin.getConfig));
 	router.get(`/api/${name}/users/csv`, middleware.ensureLoggedIn, helpers.tryRoute(controllers.admin.users.getCSV));
 	router.get(`/api/${name}/groups/:groupname/csv`, middleware.ensureLoggedIn, helpers.tryRoute(controllers.admin.groups.getCSV));
 	router.get(`/api/${name}/analytics`, middleware.ensureLoggedIn, helpers.tryRoute(controllers.admin.dashboard.getAnalytics));