diff --git a/src/webui/CMakeLists.txt b/src/webui/CMakeLists.txt
index c82340239..377a8356b 100644
--- a/src/webui/CMakeLists.txt
+++ b/src/webui/CMakeLists.txt
@@ -2,6 +2,7 @@ add_library(qbt_webui STATIC
     # headers
     api/apicontroller.h
     api/apierror.h
+    api/apistatus.h
     api/appcontroller.h
     api/authcontroller.h
     api/isessionmanager.h
diff --git a/src/webui/api/apicontroller.cpp b/src/webui/api/apicontroller.cpp
index ca2c318f4..ce279b45f 100644
--- a/src/webui/api/apicontroller.cpp
+++ b/src/webui/api/apicontroller.cpp
@@ -42,6 +42,7 @@ void APIResult::clear()
     data.clear();
     mimeType.clear();
     filename.clear();
+    status = APIStatus::Ok;
 }
 
 APIController::APIController(IApplication *app, QObject *parent)
@@ -105,3 +106,8 @@ void APIController::setResult(const QByteArray &result, const QString &mimeType,
     m_result.mimeType = mimeType;
     m_result.filename = filename;
 }
+
+void APIController::setStatus(const APIStatus status)
+{
+    m_result.status = status;
+}
diff --git a/src/webui/api/apicontroller.h b/src/webui/api/apicontroller.h
index edcfc16fc..898ad3fdc 100644
--- a/src/webui/api/apicontroller.h
+++ b/src/webui/api/apicontroller.h
@@ -34,6 +34,7 @@
 #include <QVariant>
 
 #include "base/applicationcomponent.h"
+#include "apistatus.h"
 
 using DataMap = QHash<QString, QByteArray>;
 using StringMap = QHash<QString, QString>;
@@ -43,6 +44,7 @@ struct APIResult
     QVariant data;
     QString mimeType;
     QString filename;
+    APIStatus status = APIStatus::Ok;
 
     void clear();
 };
@@ -67,6 +69,8 @@ protected:
     void setResult(const QJsonObject &result);
     void setResult(const QByteArray &result, const QString &mimeType = {}, const QString &filename = {});
 
+    void setStatus(APIStatus status);
+
 private:
     StringMap m_params;
     DataMap m_data;
diff --git a/src/webui/api/apistatus.h b/src/webui/api/apistatus.h
new file mode 100644
index 000000000..b88a5c724
--- /dev/null
+++ b/src/webui/api/apistatus.h
@@ -0,0 +1,35 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2024 Thomas Piccirello <thomas@piccirello.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#pragma once
+
+enum class APIStatus
+{
+    Ok,
+    Async
+};
diff --git a/src/webui/api/appcontroller.cpp b/src/webui/api/appcontroller.cpp
index 701160542..398f08086 100644
--- a/src/webui/api/appcontroller.cpp
+++ b/src/webui/api/appcontroller.cpp
@@ -123,6 +123,7 @@ void AppController::shutdownAction()
     {
         QCoreApplication::exit();
     });
+    setResult(QString());
 }
 
 void AppController::preferencesAction()
@@ -1167,6 +1168,8 @@ void AppController::setPreferencesAction()
 
     // Save preferences
     pref->apply();
+
+    setResult(QString());
 }
 
 void AppController::defaultSavePathAction()
@@ -1177,9 +1180,9 @@ void AppController::defaultSavePathAction()
 void AppController::sendTestEmailAction()
 {
     app()->sendTestEmail();
+    setResult(QString());
 }
 
-
 void AppController::getDirectoryContentAction()
 {
     requireParams({u"dirPath"_s});
@@ -1269,6 +1272,8 @@ void AppController::setCookiesAction()
     }
 
     Net::DownloadManager::instance()->setAllCookies(cookies);
+
+    setResult(QString());
 }
 
 void AppController::networkInterfaceListAction()
diff --git a/src/webui/api/authcontroller.cpp b/src/webui/api/authcontroller.cpp
index 5c308a62e..ee52c1df6 100644
--- a/src/webui/api/authcontroller.cpp
+++ b/src/webui/api/authcontroller.cpp
@@ -46,11 +46,13 @@ AuthController::AuthController(ISessionManager *sessionManager, IApplication *ap
 void AuthController::setUsername(const QString &username)
 {
     m_username = username;
+    setResult(QString());
 }
 
 void AuthController::setPasswordHash(const QByteArray &passwordHash)
 {
     m_passwordHash = passwordHash;
+    setResult(QString());
 }
 
 void AuthController::loginAction()
@@ -96,9 +98,10 @@ void AuthController::loginAction()
     }
 }
 
-void AuthController::logoutAction() const
+void AuthController::logoutAction()
 {
     m_sessionManager->sessionEnd();
+    setResult(QString());
 }
 
 bool AuthController::isBanned() const
diff --git a/src/webui/api/authcontroller.h b/src/webui/api/authcontroller.h
index 0a47c2338..cdd7c4cfb 100644
--- a/src/webui/api/authcontroller.h
+++ b/src/webui/api/authcontroller.h
@@ -52,7 +52,7 @@ public:
 
 private slots:
     void loginAction();
-    void logoutAction() const;
+    void logoutAction();
 
 private:
     bool isBanned() const;
diff --git a/src/webui/api/rsscontroller.cpp b/src/webui/api/rsscontroller.cpp
index d4308db46..8cdd1d532 100644
--- a/src/webui/api/rsscontroller.cpp
+++ b/src/webui/api/rsscontroller.cpp
@@ -53,6 +53,8 @@ void RSSController::addFolderAction()
     const nonstd::expected<RSS::Folder *, QString> result = RSS::Session::instance()->addFolder(path);
     if (!result)
         throw APIError(APIErrorType::Conflict, result.error());
+
+    setResult(QString());
 }
 
 void RSSController::addFeedAction()
@@ -65,6 +67,8 @@ void RSSController::addFeedAction()
     const nonstd::expected<RSS::Feed *, QString> result = RSS::Session::instance()->addFeed(url, (path.isEmpty() ? url : path), std::chrono::seconds(refreshInterval));
     if (!result)
         throw APIError(APIErrorType::Conflict, result.error());
+
+    setResult(QString());
 }
 
 void RSSController::setFeedURLAction()
@@ -76,6 +80,8 @@ void RSSController::setFeedURLAction()
     const nonstd::expected<void, QString> result = RSS::Session::instance()->setFeedURL(path, url);
     if (!result)
         throw APIError(APIErrorType::Conflict, result.error());
+
+    setResult(QString());
 }
 
 void RSSController::setFeedRefreshIntervalAction()
@@ -103,6 +109,8 @@ void RSSController::removeItemAction()
     const nonstd::expected<void, QString> result = RSS::Session::instance()->removeItem(path);
     if (!result)
         throw APIError(APIErrorType::Conflict, result.error());
+
+    setResult(QString());
 }
 
 void RSSController::moveItemAction()
@@ -114,6 +122,8 @@ void RSSController::moveItemAction()
     const nonstd::expected<void, QString> result = RSS::Session::instance()->moveItem(itemPath, destPath);
     if (!result)
         throw APIError(APIErrorType::Conflict, result.error());
+
+    setResult(QString());
 }
 
 void RSSController::itemsAction()
@@ -148,6 +158,8 @@ void RSSController::markAsReadAction()
     {
         item->markAsRead();
     }
+
+    setResult(QString());
 }
 
 void RSSController::refreshItemAction()
@@ -158,6 +170,8 @@ void RSSController::refreshItemAction()
     RSS::Item *item = RSS::Session::instance()->itemByPath(itemPath);
     if (item)
         item->refresh();
+
+    setResult(QString());
 }
 
 void RSSController::setRuleAction()
@@ -169,6 +183,8 @@ void RSSController::setRuleAction()
 
     const auto jsonObj = QJsonDocument::fromJson(ruleDef).object();
     RSS::AutoDownloader::instance()->setRule(RSS::AutoDownloadRule::fromJsonObject(jsonObj, ruleName));
+
+    setResult(QString());
 }
 
 void RSSController::renameRuleAction()
@@ -179,6 +195,8 @@ void RSSController::renameRuleAction()
     const QString newRuleName {params()[u"newRuleName"_s]};
 
     RSS::AutoDownloader::instance()->renameRule(ruleName, newRuleName);
+
+    setResult(QString());
 }
 
 void RSSController::removeRuleAction()
@@ -187,6 +205,8 @@ void RSSController::removeRuleAction()
 
     const QString ruleName {params()[u"ruleName"_s]};
     RSS::AutoDownloader::instance()->removeRule(ruleName);
+
+    setResult(QString());
 }
 
 void RSSController::rulesAction()
diff --git a/src/webui/api/searchcontroller.cpp b/src/webui/api/searchcontroller.cpp
index d7b0c9786..2af76a0f4 100644
--- a/src/webui/api/searchcontroller.cpp
+++ b/src/webui/api/searchcontroller.cpp
@@ -142,6 +142,8 @@ void SearchController::stopAction()
         searchHandler->cancelSearch();
         m_activeSearches.remove(id);
     }
+
+    setResult(QString());
 }
 
 void SearchController::statusAction()
@@ -215,6 +217,8 @@ void SearchController::deleteAction()
     searchHandler->cancelSearch();
     m_activeSearches.remove(id);
     m_searchHandlers.erase(iter);
+
+    setResult(QString());
 }
 
 void SearchController::downloadTorrentAction()
@@ -238,6 +242,8 @@ void SearchController::downloadTorrentAction()
             downloadHandler->deleteLater();
         });
     }
+
+    setResult(QString());
 }
 
 void SearchController::pluginsAction()
@@ -253,6 +259,8 @@ void SearchController::installPluginAction()
     const QStringList sources = params()[u"sources"_s].split(u'|');
     for (const QString &source : sources)
         SearchPluginManager::instance()->installPlugin(source);
+
+    setResult(QString());
 }
 
 void SearchController::uninstallPluginAction()
@@ -262,6 +270,8 @@ void SearchController::uninstallPluginAction()
     const QStringList names = params()[u"names"_s].split(u'|');
     for (const QString &name : names)
         SearchPluginManager::instance()->uninstallPlugin(name.trimmed());
+
+    setResult(QString());
 }
 
 void SearchController::enablePluginAction()
@@ -273,6 +283,8 @@ void SearchController::enablePluginAction()
 
     for (const QString &name : names)
         SearchPluginManager::instance()->enablePlugin(name.trimmed(), enable);
+
+    setResult(QString());
 }
 
 void SearchController::updatePluginsAction()
@@ -282,6 +294,8 @@ void SearchController::updatePluginsAction()
     connect(pluginManager, &SearchPluginManager::checkForUpdatesFinished, this, &SearchController::checkForUpdatesFinished);
     connect(pluginManager, &SearchPluginManager::checkForUpdatesFailed, this, &SearchController::checkForUpdatesFailed);
     pluginManager->checkForUpdates();
+
+    setResult(QString());
 }
 
 void SearchController::checkForUpdatesFinished(const QHash<QString, PluginVersion> &updateInfo)
@@ -300,6 +314,8 @@ void SearchController::checkForUpdatesFinished(const QHash<QString, PluginVersio
         LogMsg(tr("Updating plugin %1").arg(pluginName), Log::INFO);
         pluginManager->updatePlugin(pluginName);
     }
+
+    setResult(QString());
 }
 
 void SearchController::checkForUpdatesFailed(const QString &reason)
diff --git a/src/webui/api/torrentcreatorcontroller.cpp b/src/webui/api/torrentcreatorcontroller.cpp
index e3f3769e7..35e2ce849 100644
--- a/src/webui/api/torrentcreatorcontroller.cpp
+++ b/src/webui/api/torrentcreatorcontroller.cpp
@@ -256,4 +256,6 @@ void TorrentCreatorController::deleteTaskAction()
 
     if (!m_torrentCreationManager->deleteTask(id))
         throw APIError(APIErrorType::NotFound);
+
+    setResult(QString());
 }
diff --git a/src/webui/api/torrentscontroller.cpp b/src/webui/api/torrentscontroller.cpp
index cc3b2e6df..9fe658f95 100644
--- a/src/webui/api/torrentscontroller.cpp
+++ b/src/webui/api/torrentscontroller.cpp
@@ -670,6 +670,8 @@ void TorrentsController::addWebSeedsAction()
     }
 
     torrent->addUrlSeeds(urls);
+
+    setResult(QString());
 }
 
 void TorrentsController::editWebSeedAction()
@@ -702,6 +704,8 @@ void TorrentsController::editWebSeedAction()
         torrent->removeUrlSeeds({origUrl});
         torrent->addUrlSeeds({newUrl});
     }
+
+    setResult(QString());
 }
 
 void TorrentsController::removeWebSeedsAction()
@@ -725,6 +729,8 @@ void TorrentsController::removeWebSeedsAction()
     }
 
     torrent->removeUrlSeeds(urls);
+
+    setResult(QString());
 }
 
 // Returns the files in a torrent in JSON format.
@@ -939,6 +945,8 @@ void TorrentsController::addTrackersAction()
 
     const QList<BitTorrent::TrackerEntry> entries = BitTorrent::parseTrackerEntries(params()[u"urls"_s]);
     torrent->addTrackers(entries);
+
+    setResult(QString());
 }
 
 void TorrentsController::editTrackerAction()
@@ -992,6 +1000,8 @@ void TorrentsController::editTrackerAction()
 
     if (!torrent->isStopped())
         torrent->forceReannounce();
+
+    setResult(QString());
 }
 
 void TorrentsController::removeTrackersAction()
@@ -1026,6 +1036,8 @@ void TorrentsController::removeTrackersAction()
 
     for (BitTorrent::Torrent *const torrent : asConst(torrents))
         torrent->removeTrackers(urls);
+
+    setResult(QString());
 }
 
 void TorrentsController::addPeersAction()
@@ -1072,6 +1084,8 @@ void TorrentsController::stopAction()
 
     const QStringList hashes = params()[u"hashes"_s].split(u'|');
     applyToTorrents(hashes, [](BitTorrent::Torrent *const torrent) { torrent->stop(); });
+
+    setResult(QString());
 }
 
 void TorrentsController::startAction()
@@ -1080,6 +1094,8 @@ void TorrentsController::startAction()
 
     const QStringList idStrings = params()[u"hashes"_s].split(u'|');
     applyToTorrents(idStrings, [](BitTorrent::Torrent *const torrent) { torrent->start(); });
+
+    setResult(QString());
 }
 
 void TorrentsController::filePrioAction()
@@ -1121,6 +1137,8 @@ void TorrentsController::filePrioAction()
 
     if (priorityChanged)
         torrent->prioritizeFiles(priorities);
+
+    setResult(QString());
 }
 
 void TorrentsController::uploadLimitAction()
@@ -1169,6 +1187,8 @@ void TorrentsController::setUploadLimitAction()
 
     const QStringList hashes {params()[u"hashes"_s].split(u'|')};
     applyToTorrents(hashes, [limit](BitTorrent::Torrent *const torrent) { torrent->setUploadLimit(limit); });
+
+    setResult(QString());
 }
 
 void TorrentsController::setDownloadLimitAction()
@@ -1181,6 +1201,8 @@ void TorrentsController::setDownloadLimitAction()
 
     const QStringList hashes {params()[u"hashes"_s].split(u'|')};
     applyToTorrents(hashes, [limit](BitTorrent::Torrent *const torrent) { torrent->setDownloadLimit(limit); });
+
+    setResult(QString());
 }
 
 void TorrentsController::setShareLimitsAction()
@@ -1198,6 +1220,8 @@ void TorrentsController::setShareLimitsAction()
         torrent->setSeedingTimeLimit(seedingTimeLimit);
         torrent->setInactiveSeedingTimeLimit(inactiveSeedingTimeLimit);
     });
+
+    setResult(QString());
 }
 
 void TorrentsController::toggleSequentialDownloadAction()
@@ -1206,6 +1230,8 @@ void TorrentsController::toggleSequentialDownloadAction()
 
     const QStringList hashes {params()[u"hashes"_s].split(u'|')};
     applyToTorrents(hashes, [](BitTorrent::Torrent *const torrent) { torrent->toggleSequentialDownload(); });
+
+    setResult(QString());
 }
 
 void TorrentsController::toggleFirstLastPiecePrioAction()
@@ -1214,6 +1240,8 @@ void TorrentsController::toggleFirstLastPiecePrioAction()
 
     const QStringList hashes {params()[u"hashes"_s].split(u'|')};
     applyToTorrents(hashes, [](BitTorrent::Torrent *const torrent) { torrent->toggleFirstLastPiecePriority(); });
+
+    setResult(QString());
 }
 
 void TorrentsController::setSuperSeedingAction()
@@ -1223,6 +1251,8 @@ void TorrentsController::setSuperSeedingAction()
     const bool value {parseBool(params()[u"value"_s]).value_or(false)};
     const QStringList hashes {params()[u"hashes"_s].split(u'|')};
     applyToTorrents(hashes, [value](BitTorrent::Torrent *const torrent) { torrent->setSuperSeeding(value); });
+
+    setResult(QString());
 }
 
 void TorrentsController::setForceStartAction()
@@ -1235,6 +1265,8 @@ void TorrentsController::setForceStartAction()
     {
         torrent->start(value ? BitTorrent::TorrentOperatingMode::Forced : BitTorrent::TorrentOperatingMode::AutoManaged);
     });
+
+    setResult(QString());
 }
 
 void TorrentsController::deleteAction()
@@ -1248,6 +1280,8 @@ void TorrentsController::deleteAction()
     {
         BitTorrent::Session::instance()->removeTorrent(torrent->id(), deleteOption);
     });
+
+    setResult(QString());
 }
 
 void TorrentsController::increasePrioAction()
@@ -1259,6 +1293,8 @@ void TorrentsController::increasePrioAction()
 
     const QStringList hashes {params()[u"hashes"_s].split(u'|')};
     BitTorrent::Session::instance()->increaseTorrentsQueuePos(toTorrentIDs(hashes));
+
+    setResult(QString());
 }
 
 void TorrentsController::decreasePrioAction()
@@ -1270,6 +1306,8 @@ void TorrentsController::decreasePrioAction()
 
     const QStringList hashes {params()[u"hashes"_s].split(u'|')};
     BitTorrent::Session::instance()->decreaseTorrentsQueuePos(toTorrentIDs(hashes));
+
+    setResult(QString());
 }
 
 void TorrentsController::topPrioAction()
@@ -1281,6 +1319,8 @@ void TorrentsController::topPrioAction()
 
     const QStringList hashes {params()[u"hashes"_s].split(u'|')};
     BitTorrent::Session::instance()->topTorrentsQueuePos(toTorrentIDs(hashes));
+
+    setResult(QString());
 }
 
 void TorrentsController::bottomPrioAction()
@@ -1292,6 +1332,8 @@ void TorrentsController::bottomPrioAction()
 
     const QStringList hashes {params()[u"hashes"_s].split(u'|')};
     BitTorrent::Session::instance()->bottomTorrentsQueuePos(toTorrentIDs(hashes));
+
+    setResult(QString());
 }
 
 void TorrentsController::setLocationAction()
@@ -1315,6 +1357,8 @@ void TorrentsController::setLocationAction()
         torrent->setAutoTMMEnabled(false);
         torrent->setSavePath(newLocation);
     });
+
+    setResult(QString());
 }
 
 void TorrentsController::setSavePathAction()
@@ -1340,6 +1384,8 @@ void TorrentsController::setSavePathAction()
         if (!torrent->isAutoTMMEnabled())
             torrent->setSavePath(newPath);
     });
+
+    setResult(QString());
 }
 
 void TorrentsController::setDownloadPathAction()
@@ -1365,6 +1411,8 @@ void TorrentsController::setDownloadPathAction()
         if (!torrent->isAutoTMMEnabled())
             torrent->setDownloadPath(newPath);
     });
+
+    setResult(QString());
 }
 
 void TorrentsController::renameAction()
@@ -1383,6 +1431,8 @@ void TorrentsController::renameAction()
 
     name.replace(QRegularExpression(u"\r?\n|\r"_s), u" "_s);
     torrent->setName(name);
+
+    setResult(QString());
 }
 
 void TorrentsController::setAutoManagementAction()
@@ -1396,6 +1446,8 @@ void TorrentsController::setAutoManagementAction()
     {
         torrent->setAutoTMMEnabled(isEnabled);
     });
+
+    setResult(QString());
 }
 
 void TorrentsController::recheckAction()
@@ -1404,6 +1456,8 @@ void TorrentsController::recheckAction()
 
     const QStringList hashes {params()[u"hashes"_s].split(u'|')};
     applyToTorrents(hashes, [](BitTorrent::Torrent *const torrent) { torrent->forceRecheck(); });
+
+    setResult(QString());
 }
 
 void TorrentsController::reannounceAction()
@@ -1412,6 +1466,8 @@ void TorrentsController::reannounceAction()
 
     const QStringList hashes {params()[u"hashes"_s].split(u'|')};
     applyToTorrents(hashes, [](BitTorrent::Torrent *const torrent) { torrent->forceReannounce(); });
+
+    setResult(QString());
 }
 
 void TorrentsController::setCategoryAction()
@@ -1426,6 +1482,8 @@ void TorrentsController::setCategoryAction()
         if (!torrent->setCategory(category))
             throw APIError(APIErrorType::Conflict, tr("Incorrect category name"));
     });
+
+    setResult(QString());
 }
 
 void TorrentsController::createCategoryAction()
@@ -1451,6 +1509,8 @@ void TorrentsController::createCategoryAction()
 
     if (!BitTorrent::Session::instance()->addCategory(category, categoryOptions))
         throw APIError(APIErrorType::Conflict, tr("Unable to create category"));
+
+    setResult(QString());
 }
 
 void TorrentsController::editCategoryAction()
@@ -1473,6 +1533,8 @@ void TorrentsController::editCategoryAction()
 
     if (!BitTorrent::Session::instance()->editCategory(category, categoryOptions))
         throw APIError(APIErrorType::Conflict, tr("Unable to edit category"));
+
+    setResult(QString());
 }
 
 void TorrentsController::removeCategoriesAction()
@@ -1482,6 +1544,8 @@ void TorrentsController::removeCategoriesAction()
     const QStringList categories {params()[u"categories"_s].split(u'\n')};
     for (const QString &category : categories)
         BitTorrent::Session::instance()->removeCategory(category);
+
+    setResult(QString());
 }
 
 void TorrentsController::categoriesAction()
@@ -1517,6 +1581,8 @@ void TorrentsController::addTagsAction()
             torrent->addTag(Tag(tagStr));
         });
     }
+
+    setResult(QString());
 }
 
 void TorrentsController::setTagsAction()
@@ -1562,6 +1628,8 @@ void TorrentsController::removeTagsAction()
             torrent->removeAllTags();
         });
     }
+
+    setResult(QString());
 }
 
 void TorrentsController::createTagsAction()
@@ -1572,6 +1640,8 @@ void TorrentsController::createTagsAction()
 
     for (const QString &tagStr : tags)
         BitTorrent::Session::instance()->addTag(Tag(tagStr));
+
+    setResult(QString());
 }
 
 void TorrentsController::deleteTagsAction()
@@ -1581,6 +1651,8 @@ void TorrentsController::deleteTagsAction()
     const QStringList tags {params()[u"tags"_s].split(u',', Qt::SkipEmptyParts)};
     for (const QString &tagStr : tags)
         BitTorrent::Session::instance()->removeTag(Tag(tagStr));
+
+    setResult(QString());
 }
 
 void TorrentsController::tagsAction()
@@ -1611,6 +1683,8 @@ void TorrentsController::renameFileAction()
     {
         throw APIError(APIErrorType::Conflict, error.message());
     }
+
+    setResult(QString());
 }
 
 void TorrentsController::renameFolderAction()
@@ -1633,6 +1707,8 @@ void TorrentsController::renameFolderAction()
     {
         throw APIError(APIErrorType::Conflict, error.message());
     }
+
+    setResult(QString());
 }
 
 void TorrentsController::exportAction()
@@ -1689,4 +1765,6 @@ void TorrentsController::setSSLParametersAction()
         throw APIError(APIErrorType::BadData);
 
     torrent->setSSLParameters(sslParams);
+
+    setResult(QString());
 }
diff --git a/src/webui/api/transfercontroller.cpp b/src/webui/api/transfercontroller.cpp
index 66ecb2747..8ef1c5803 100644
--- a/src/webui/api/transfercontroller.cpp
+++ b/src/webui/api/transfercontroller.cpp
@@ -104,6 +104,8 @@ void TransferController::setUploadLimitAction()
     if (limit == 0) limit = -1;
 
     BitTorrent::Session::instance()->setUploadSpeedLimit(limit);
+
+    setResult(QString());
 }
 
 void TransferController::setDownloadLimitAction()
@@ -113,12 +115,16 @@ void TransferController::setDownloadLimitAction()
     if (limit == 0) limit = -1;
 
     BitTorrent::Session::instance()->setDownloadSpeedLimit(limit);
+
+    setResult(QString());
 }
 
 void TransferController::toggleSpeedLimitsModeAction()
 {
     BitTorrent::Session *const session = BitTorrent::Session::instance();
     session->setAltGlobalSpeedLimitEnabled(!session->isAltGlobalSpeedLimitEnabled());
+
+    setResult(QString());
 }
 
 void TransferController::speedLimitsModeAction()
@@ -136,6 +142,8 @@ void TransferController::setSpeedLimitsModeAction()
 
     // Any non-zero values are considered as alternative mode
     BitTorrent::Session::instance()->setAltGlobalSpeedLimitEnabled(mode != 0);
+
+    setResult(QString());
 }
 
 void TransferController::banPeersAction()
@@ -149,4 +157,6 @@ void TransferController::banPeersAction()
         if (!addr.ip.isNull())
             BitTorrent::Session::instance()->banIP(addr.ip.toString());
     }
+
+    setResult(QString());
 }
diff --git a/src/webui/webapplication.cpp b/src/webui/webapplication.cpp
index 22c6dc401..a28e002b5 100644
--- a/src/webui/webapplication.cpp
+++ b/src/webui/webapplication.cpp
@@ -361,25 +361,43 @@ void WebApplication::doProcessRequest()
     try
     {
         const APIResult result = controller->run(action, m_params, data);
-        switch (result.data.userType())
+        if (result.data.isNull())
         {
-        case QMetaType::QJsonDocument:
-            print(result.data.toJsonDocument().toJson(QJsonDocument::Compact), Http::CONTENT_TYPE_JSON);
-            break;
-        case QMetaType::QByteArray:
+            status(204);
+        }
+        else
+        {
+            switch (result.data.userType())
             {
-                const auto resultData = result.data.toByteArray();
-                print(resultData, (!result.mimeType.isEmpty() ? result.mimeType : Http::CONTENT_TYPE_TXT));
-                if (!result.filename.isEmpty())
+            case QMetaType::QJsonDocument:
+                print(result.data.toJsonDocument().toJson(QJsonDocument::Compact), Http::CONTENT_TYPE_JSON);
+                break;
+            case QMetaType::QByteArray:
                 {
-                    setHeader({u"Content-Disposition"_s, u"attachment; filename=\"%1\""_s.arg(result.filename)});
+                    const auto resultData = result.data.toByteArray();
+                    print(resultData, (!result.mimeType.isEmpty() ? result.mimeType : Http::CONTENT_TYPE_TXT));
+                    if (!result.filename.isEmpty())
+                    {
+                        setHeader({u"Content-Disposition"_s, u"attachment; filename=\"%1\""_s.arg(result.filename)});
+                    }
                 }
+                break;
+            case QMetaType::QString:
+            default:
+                print(result.data.toString(), Http::CONTENT_TYPE_TXT);
+                break;
+            }
+
+            switch (result.status)
+            {
+            case APIStatus::Async:
+                status(202);
+                break;
+            case APIStatus::Ok:
+            default:
+                status(200);
+                break;
             }
-            break;
-        case QMetaType::QString:
-        default:
-            print(result.data.toString(), Http::CONTENT_TYPE_TXT);
-            break;
         }
     }
     catch (const APIError &error)