diff --git a/editor/js/i18n.js b/editor/js/i18n.js
index 196488958..9e9695163 100644
--- a/editor/js/i18n.js
+++ b/editor/js/i18n.js
@@ -16,10 +16,13 @@
 
 RED.i18n = (function() {
 
+    var apiRootUrl;
+
     return {
-        init: function(done) {
+        init: function(options, done) {
+            apiRootUrl = options.apiRootUrl||"";
             i18n.init({
-                resGetPath: 'locales/__ns__?lng=__lng__',
+                resGetPath: apiRootUrl+'locales/__ns__?lng=__lng__',
                 dynamicLoad: false,
                 load:'current',
                 ns: {
@@ -45,7 +48,7 @@ RED.i18n = (function() {
                         "Accept":"application/json"
                     },
                     cache: false,
-                    url: 'nodes/'+namespace+'/messages?lng='+lang,
+                    url: apiRootUrl+'nodes/'+namespace+'/messages?lng='+lang,
                     success: function(data) {
                         i18n.addResourceBundle(lang,namespace,data);
                         toLoad--;
@@ -68,7 +71,7 @@ RED.i18n = (function() {
                         "Accept":"application/json"
                     },
                     cache: false,
-                    url: 'nodes/messages?lng='+lang,
+                    url: apiRootUrl+'nodes/messages?lng='+lang,
                     success: function(data) {
                         var namespaces = Object.keys(data);
                         namespaces.forEach(function(ns) {
diff --git a/editor/js/main.js b/editor/js/main.js
index b01136386..7aeea168e 100644
--- a/editor/js/main.js
+++ b/editor/js/main.js
@@ -18,5 +18,7 @@ $(function() {
     if ((window.location.hostname !== "localhost") && (window.location.hostname !== "127.0.0.1")) {
         document.title = document.title+" : "+window.location.hostname;
     }
-    RED.init();
+    RED.init({
+        apiRootUrl: ""
+    });
 });
diff --git a/editor/js/red.js b/editor/js/red.js
index 74ebb1187..ff629f378 100644
--- a/editor/js/red.js
+++ b/editor/js/red.js
@@ -463,12 +463,21 @@ var RED = (function() {
         loadNodeList();
     }
 
+    var initialised = false;
 
-    function init() {
+    function init(options) {
+        if (initialised) {
+            throw new Error("RED already initialised");
+        }
+        initialised = true;
         ace.require("ace/ext/language_tools");
-
-        RED.i18n.init(function() {
-            RED.settings.init(loadEditor);
+        options = options || {};
+        options.apiRootUrl = options.apiRootUrl || "";
+        if (options.apiRootUrl && !/\/$/.test(options.apiRootUrl)) {
+            options.apiRootUrl = options.apiRootUrl+"/";
+        }
+        RED.i18n.init(options, function() {
+            RED.settings.init(options, loadEditor);
         })
     }
 
diff --git a/editor/js/settings.js b/editor/js/settings.js
index 9594bec43..faf80c083 100644
--- a/editor/js/settings.js
+++ b/editor/js/settings.js
@@ -89,18 +89,22 @@ RED.settings = (function () {
         userSettings = data;
     }
 
-    var init = function (done) {
+    var init = function (options, done) {
         var accessTokenMatch = /[?&]access_token=(.*?)(?:$|&)/.exec(window.location.search);
         if (accessTokenMatch) {
             var accessToken = accessTokenMatch[1];
             RED.settings.set("auth-tokens",{access_token: accessToken});
             window.location.search = "";
         }
+        RED.settings.apiRootUrl = options.apiRootUrl;
 
         $.ajaxSetup({
             beforeSend: function(jqXHR,settings) {
                 // Only attach auth header for requests to relative paths
                 if (!/^\s*(https?:|\/|\.)/.test(settings.url)) {
+                    if (options.apiRootUrl) {
+                        settings.url = options.apiRootUrl+settings.url;
+                    }
                     var auth_tokens = RED.settings.get("auth-tokens");
                     if (auth_tokens) {
                         jqXHR.setRequestHeader("Authorization","Bearer "+auth_tokens.access_token);
diff --git a/editor/js/ui/utils.js b/editor/js/ui/utils.js
index 9dd4d8ac2..23c3e3466 100644
--- a/editor/js/ui/utils.js
+++ b/editor/js/ui/utils.js
@@ -745,25 +745,25 @@ RED.utils = (function() {
 
     function getNodeIcon(def,node) {
         if (def.category === 'config') {
-            return "icons/node-red/cog.png"
+            return RED.settings.apiRootUrl+"icons/node-red/cog.png"
         } else if (node && node.type === 'tab') {
-            return "icons/node-red/subflow.png"
+            return RED.settings.apiRootUrl+"icons/node-red/subflow.png"
         } else if (node && node.type === 'unknown') {
-            return "icons/node-red/alert.png"
+            return RED.settings.apiRootUrl+"icons/node-red/alert.png"
         } else if (node && node.icon) {
             var iconPath = separateIconPath(node.icon);
             if (isIconExists(iconPath)) {
-                return "icons/" + node.icon;
+                return RED.settings.apiRootUrl+"icons/" + node.icon;
             }
         }
 
         var iconPath = getDefaultNodeIcon(def, node);
         if (def.category === 'subflows') {
             if (!isIconExists(iconPath)) {
-                return "icons/node-red/subflow.png";
+                return RED.settings.apiRootUrl+"icons/node-red/subflow.png";
             }
         }
-        return "icons/"+iconPath.module+"/"+iconPath.file;
+        return RED.settings.apiRootUrl+"icons/"+iconPath.module+"/"+iconPath.file;
     }
 
     function getNodeLabel(node,defaultLabel) {