diff --git a/src/api.php b/src/api.php
index d803212..3bfac3a 100644
--- a/src/api.php
+++ b/src/api.php
@@ -20,6 +20,7 @@ require_once(MTTINC. 'api/ListsController.php');
 require_once(MTTINC. 'api/TasksController.php');
 require_once(MTTINC. 'api/TagsController.php');
 require_once(MTTINC. 'api/AuthController.php');
+require_once(MTTINC. 'api/ExtSettingsController.php');
 
 $endpoints = array(
     '/lists' => [
@@ -53,6 +54,10 @@ $endpoints = array(
     '/(login|logout|session)' => [
         'POST' => [ AuthController::class , 'postAction' ],
     ],
+    '/ext-settings/(.+)' => [
+        'GET'     => [ ExtSettingsController::class , 'get' ],
+        'PUT'     => [ ExtSettingsController::class , 'put' ],
+    ]
 );
 
 $req = new ApiRequest();
diff --git a/src/content/mytinytodo.js b/src/content/mytinytodo.js
index ded7a0a..914a989 100644
--- a/src/content/mytinytodo.js
+++ b/src/content/mytinytodo.js
@@ -598,6 +598,9 @@ var mytinytodo = window.mytinytodo = _mtt = {
             else if (settingsPage == 'ext-activate' || settingsPage == 'ext-deactivate') {
                 activateExtension(settingsPage == 'ext-activate' ? true : false, this.dataset.ext);
             }
+            else if (settingsPage == 'ext-index') {
+                showExtensionSettings(this.dataset.ext);
+            }
             return false;
         });
 
@@ -606,6 +609,11 @@ var mytinytodo = window.mytinytodo = _mtt = {
             return false;
         });
 
+        $("#page_ajax").on('submit', '#ext_settings_form', function() {
+            saveExtensionSettings(this);
+            return false;
+        });
+
         $(document).on('click', '.mtt-back-button', function() {
             _mtt.pageBack(true);
             this.blur();
@@ -2518,16 +2526,10 @@ function flashInfo(str, details)
     $("#msg").addClass('mtt-info').effect("highlight", {color:_mtt.theme.msgFlashColor}, 700);
 }
 
-function toggleMsgDetails()
-{
-    var el = $("#msg>.msg-details");
-    if(!el) return;
-    if(el.css('display') == 'none') el.show();
-    else el.hide()
-}
-
 function hideAlert()
 {
+    $("#msg>.msg-text").text('');
+    $("#msg>.msg-details").text('');
     $("#msg").hide().removeClass('mtt-error mtt-info').find('.msg-details').hide();
 }
 
@@ -2654,6 +2656,40 @@ function activateExtension(activate, ext)
     }, 'json');
 }
 
+function showExtensionSettings(ext, callback)
+{
+    if (_mtt.pages.current && _mtt.pages.current.page == 'ajax' && _mtt.pages.current.pageClass == 'settings') {
+        $('#page_ajax').load(_mtt.apiUrl + 'ext-settings/' + ext, null, function() {
+            if (callback !== undefined) callback();
+        });
+    }
+
+}
+
+function saveExtensionSettings(frm)
+{
+    if (!frm) return false;
+    var ext = frm.dataset.ext;
+    var params = {};
+    $(frm).find("input:hidden,input:text,input:password,input:checked,select").filter(":enabled").each(function() { params[this.name || '__'] = this.value; });
+    $.ajax({
+        url: _mtt.apiUrl + 'ext-settings/' + ext,
+        method: 'PUT',
+        contentType : 'application/json',
+        data: JSON.stringify(params),
+        dataType: 'json',
+        success: function(json) {
+            if (json.saved) {
+                if (json.msg) showExtensionSettings(ext, function(){
+                    flashInfo(json.msg);
+                });
+                else showExtensionSettings(ext);
+
+            }
+        }
+    });
+}
+
 /*
  *  Dialogs
  */
diff --git a/src/content/theme/style.css b/src/content/theme/style.css
index 306ec45..8d2982a 100644
--- a/src/content/theme/style.css
+++ b/src/content/theme/style.css
@@ -938,7 +938,9 @@ li.mtt-item-hidden { display:none; }
   border-color: var(--color-border-focus);
   box-shadow:0 0 0 2px var(--color-border-focus-shadow);
 }
-
+.mtt-settings-table a {
+  color: var(--color-text-default);
+}
 
 #modal {
   position: absolute;
diff --git a/src/includes/api/ExtSettingsController.php b/src/includes/api/ExtSettingsController.php
new file mode 100644
index 0000000..64b6d7d
--- /dev/null
+++ b/src/includes/api/ExtSettingsController.php
@@ -0,0 +1,78 @@
+<?php declare(strict_types=1);
+
+class ExtSettingsController extends ApiController {
+
+    /**
+     * Get extension settings page
+     * @return void
+     * @throws Exception
+     */
+    function get($ext)
+    {
+        /** @var MTTExtension|MTTExtensionSettingsInterface $instance */
+        $instance = $this->extInstance($ext);
+        if (!$instance) {
+            return;
+        }
+
+        $data = $instance->settingsPage();
+
+        $title = htmlspecialchars($instance::title);
+        $escapedExt = htmlspecialchars($ext);
+        $e = function($s) { return __($s, true); };
+        $data =
+<<<EOD
+<h3 class="page-title"><a class="mtt-back-button"></a> $title </h3>
+<div id="settings_msg" style="display:none"></div>
+<form id="ext_settings_form" data-ext="$escapedExt">
+  <div class="mtt-settings-table">
+    $data
+    <div class="form-bottom-buttons">
+      <button type="submit">{$e('set_submit')}</button>
+      <button type="button" class="mtt-back-button">{$e('set_cancel')}</button>
+    </div>
+  </div>
+</form>
+EOD;
+
+        $this->response->htmlContent($data);
+    }
+
+    /**
+     * Save extension settings
+     * @return void
+     * @throws Exception
+     */
+    function put($ext)
+    {
+        /** @var MTTExtension|MTTExtensionSettingsInterface $instance */
+        $instance = $this->extInstance($ext);
+        if (!$instance) {
+            return;
+        }
+        //$userError = '';
+        $saved = $instance->saveSettings($this->req->jsonBody ?? [], $userError);
+        $a = [ 'saved' => (int)$saved ];
+        if ($userError) {
+            $a['msg'] = $userError;
+        }
+        $this->response->data = $a;
+    }
+
+    private function extInstance($ext): ?MTTExtensionSettingsInterface
+    {
+        $instance = MTTExtensionLoader::extensionInstance($ext);
+        if (!$instance) {
+            $this->response->data = [ 'msg' => "Unknown extension" ];
+            $this->response->code = 404;
+            return null;
+        }
+        if (! ($instance instanceof MTTExtensionSettingsInterface) ) {
+            $this->response->data = [ 'msg' => "No settings page for extension" ];
+            $this->response->code = 500;
+            return null;
+        }
+        return $instance;
+    }
+
+}
diff --git a/src/includes/classes.php b/src/includes/classes.php
index 7297d29..6b838a3 100644
--- a/src/includes/classes.php
+++ b/src/includes/classes.php
@@ -79,6 +79,11 @@ abstract class MTTExtension
 }
 
 
+interface MTTExtensionSettingsInterface
+{
+    function settingsPage(): string;
+    function saveSettings(array $array, ?string &$userError): bool;
+}
 
 
 class MTTExtensionLoader
diff --git a/src/settings.php b/src/settings.php
index f303ac9..d46eae8 100644
--- a/src/settings.php
+++ b/src/settings.php
@@ -189,6 +189,10 @@ function listExtensions()
         $out = "$ext ";
         if (in_array($ext, $activatedExts)) {
             $out .= "<a href='#' data-settings-link='ext-deactivate' data-ext='". htmlspecialchars($ext).  "'>". __('set_deactivate', true). '</a>';
+            $instance = MTTExtensionLoader::extensionInstance($ext);
+            if ($instance instanceof MTTExtensionSettingsInterface) {
+                $out .= " <a href='#' data-settings-link='ext-index' data-ext='". htmlspecialchars($ext). "'>". __('a_settings', true). "</a>";
+            }
         }
         else {
             $out .= "<a href='#' data-settings-link='ext-activate' data-ext='". htmlspecialchars($ext). "'>". __('set_activate', true). '</a>';