Allow to enable/disable MCP endpoint

src/EventSubscriber/McpAccessSubscriber.php

@@ -0,0 +1,60 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2026 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace App\EventSubscriber;
+
+use App\Settings\AISettings\McpSettings;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpKernel\Event\RequestEvent;
+use Symfony\Component\HttpKernel\Exception\ServiceUnavailableHttpException;
+use Symfony\Component\HttpKernel\KernelEvents;
+
+readonly class McpAccessSubscriber implements EventSubscriberInterface
+{
+    public function __construct(private McpSettings $mcpSettings)
+    {
+    }
+
+    public static function getSubscribedEvents(): array
+    {
+        return [
+            KernelEvents::REQUEST => ['onKernelRequest', 10],
+        ];
+    }
+
+    public function onKernelRequest(RequestEvent $event): void
+    {
+        if (!$event->isMainRequest()) {
+            return;
+        }
+
+        $path = $event->getRequest()->getPathInfo();
+
+        if (!str_starts_with($path, '/mcp')) {
+            return;
+        }
+
+        if (!$this->mcpSettings->enabled) {
+            throw new ServiceUnavailableHttpException(null, 'The MCP endpoint is disabled. Enable it in the system settings.');
+        }
+    }
+}

src/Settings/AISettings/AISettings.php

@@ -35,6 +35,9 @@ class AISettings
 {
     use SettingsTrait;
 
+    #[EmbeddedSettings]
+    public ?McpSettings $mcp = null;
+
     #[EmbeddedSettings]
     public ?OpenRouterSettings $openRouter = null;
 

src/Settings/AISettings/McpSettings.php

@@ -0,0 +1,45 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2026 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace App\Settings\AISettings;
+
+use App\Settings\SettingsIcon;
+use Jbtronics\SettingsBundle\Metadata\EnvVarMode;
+use Jbtronics\SettingsBundle\Settings\Settings;
+use Jbtronics\SettingsBundle\Settings\SettingsParameter;
+use Jbtronics\SettingsBundle\Settings\SettingsTrait;
+use Symfony\Component\Translation\TranslatableMessage as TM;
+
+#[Settings(label: new TM("settings.misc.mcp"))]
+#[SettingsIcon("fa-robot")]
+class McpSettings
+{
+    use SettingsTrait;
+
+    #[SettingsParameter(
+        label: new TM("settings.misc.mcp.enabled"),
+        description: new TM("settings.misc.mcp.enabled.help"),
+        envVar: "bool:MCP_ENABLED",
+        envVarMode: EnvVarMode::OVERWRITE,
+    )]
+    public bool $enabled = false;
+}

translations/messages.de.xlf

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <xliff xmlns="urn:oasis:names:tc:xliff:document:2.0" version="2.0" srcLang="en" trgLang="de">
-  <file id="messages.en">
+  <file id="messages.de">
     <unit id="x_wTSQS" name="attachment_type.caption">
       <segment state="translated">
         <source>attachment_type.caption</source>
@@ -10034,6 +10034,24 @@ Bitte beachten Sie, dass Sie sich nicht als deaktivierter Benutzer ausgeben kön
         <target>Servereinstellungen</target>
       </segment>
     </unit>
+    <unit id="ZDiR5ya" name="settings.misc.mcp">
+      <segment state="translated">
+        <source>settings.misc.mcp</source>
+        <target>MCP (Model Context Protocol) Server</target>
+      </segment>
+    </unit>
+    <unit id="CdFWDgN" name="settings.misc.mcp.enabled">
+      <segment state="translated">
+        <source>settings.misc.mcp.enabled</source>
+        <target>MCP-Endpunkt aktivieren</target>
+      </segment>
+    </unit>
+    <unit id="Gyos.5e" name="settings.misc.mcp.enabled.help">
+      <segment state="translated">
+        <source>settings.misc.mcp.enabled.help</source>
+        <target>Aktiviert den MCP-Endpunkt (Model Context Protocol) unter /mcp, der es KI-Assistenten ermöglicht, mit Part-DB zu interagieren.</target>
+      </segment>
+    </unit>
     <unit id="xtw_ol7" name="settings.misc.kicad_eda">
       <segment state="translated">
         <source>settings.misc.kicad_eda</source>

translations/messages.en.xlf

@@ -10035,6 +10035,24 @@ Please note, that you can not impersonate a disabled user. If you try you will g
         <target>Server settings</target>
       </segment>
     </unit>
+    <unit id="ZDiR5ya" name="settings.misc.mcp">
+      <segment state="translated">
+        <source>settings.misc.mcp</source>
+        <target>MCP (Model Context Protocol) Server</target>
+      </segment>
+    </unit>
+    <unit id="CdFWDgN" name="settings.misc.mcp.enabled">
+      <segment state="translated">
+        <source>settings.misc.mcp.enabled</source>
+        <target>Enable MCP endpoint</target>
+      </segment>
+    </unit>
+    <unit id="Gyos.5e" name="settings.misc.mcp.enabled.help">
+      <segment state="translated">
+        <source>settings.misc.mcp.enabled.help</source>
+        <target>Enable the MCP (Model Context Protocol) endpoint at /mcp, which allows AI assistants to interact with Part-DB.</target>
+      </segment>
+    </unit>
     <unit id="xtw_ol7" name="settings.misc.kicad_eda">
       <segment state="translated">
         <source>settings.misc.kicad_eda</source>