diff --git a/src/citron/mod_manager/mod_service.h b/src/citron/mod_manager/mod_service.h
new file mode 100644
index 000000000..23d7619bc
--- /dev/null
+++ b/src/citron/mod_manager/mod_service.h
@@ -0,0 +1,49 @@
+// SPDX-FileCopyrightText: Copyright 2026 citron Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <QObject>
+#include <QString>
+#include <QStringList>
+#include <QUrl>
+#include <vector>
+#include <map>
+#include <memory>
+
+class QNetworkAccessManager;
+
+namespace ModManager {
+
+struct ModPatch {
+    QString name;
+    QString type; // "exefs" or "romfs"
+    QString rel_path;
+    QStringList files;
+};
+
+struct ModUpdateInfo {
+    QString title_id;
+    // Maps Version String (e.g. "2.0.0") to its list of patches
+    std::map<QString, std::vector<ModPatch>> version_patches;
+};
+
+class ModService : public QObject {
+    Q_OBJECT
+public:
+    explicit ModService(QObject* parent = nullptr);
+    ~ModService();
+
+    // Removed the version parameter so it fetches everything
+    void FetchAvailableMods(const QString& title_id);
+
+signals:
+    void ModsAvailable(const ModUpdateInfo& info);
+    void Error(const QString& message);
+
+private:
+    std::unique_ptr<QNetworkAccessManager> network_manager;
+    const QString MANIFEST_URL = QStringLiteral("https://raw.githubusercontent.com/CollectingW/Citron-Mods/main/manifest.json");
+};
+
+} // namespace ModManager