feat: add MCP server for the website chatbot over a mirrored TYPO3 content feed

config/bundles.php

@@ -20,4 +20,5 @@ return [
     Knp\Bundle\MenuBundle\KnpMenuBundle::class => ['all' => true],
     Knp\Bundle\PaginatorBundle\KnpPaginatorBundle::class => ['all' => true],
     Symfony\UX\TwigComponent\TwigComponentBundle::class => ['all' => true],
+    Symfony\AI\McpBundle\McpBundle::class => ['all' => true],
 ];

config/packages/framework.yaml

@@ -16,6 +16,13 @@ framework:
     php_errors:
         log: true
 
+    rate_limiter:
+      # Per MCP token. A chatbot turn makes a few tool calls; this catches runaway loops.
+      chatbot_mcp:
+        policy: sliding_window
+        limit: 60
+        interval: '1 minute'
+
     http_client:
       scoped_clients:
         typo3.client:

config/packages/http_discovery.yaml

@@ -0,0 +1,10 @@
+services:
+    Psr\Http\Message\RequestFactoryInterface: '@http_discovery.psr17_factory'
+    Psr\Http\Message\ResponseFactoryInterface: '@http_discovery.psr17_factory'
+    Psr\Http\Message\ServerRequestFactoryInterface: '@http_discovery.psr17_factory'
+    Psr\Http\Message\StreamFactoryInterface: '@http_discovery.psr17_factory'
+    Psr\Http\Message\UploadedFileFactoryInterface: '@http_discovery.psr17_factory'
+    Psr\Http\Message\UriFactoryInterface: '@http_discovery.psr17_factory'
+
+    http_discovery.psr17_factory:
+        class: Http\Discovery\Psr17Factory

config/packages/mcp.yaml

@@ -0,0 +1,16 @@
+# The website chatbot's MCP server, called by the n8n AI Agent through its MCP Client Tool
+# node. Read-only tools over the mirrored TYPO3 content and our own trip data; see
+# docs/chatbot-mcp.md. Authentication is the "mcp" firewall in security.yaml.
+mcp:
+    servers:
+        chatbot:
+            name: 'MyE&P chatbot'
+            version: '1.0.0'
+            instructions: 'Answers questions about the trips and website content of E&P Reisen and its brands. Every result carries a url to cite. Prices and availability are a snapshot as of dataAsOf; the booking page is binding.'
+            http:
+                path: /mcp
+                # DNS rebinding protection guards unauthenticated local servers. This one is
+                # public, behind a bearer token, and never called from a browser.
+                allowed_hosts: false
+            registry:
+                tools: ['App\Chatbot\Mcp\Tool\']

config/packages/monolog.yaml

@@ -5,6 +5,7 @@ monolog:
         - core
         - auth
         - admin
+        - chatbot
 
 when@dev:
     monolog:
@@ -33,11 +34,16 @@ when@dev:
                 path: "%kernel.logs_dir%/%kernel.environment%.admin.log"
                 level: debug
                 channels: ["admin"]
+            chatbot:
+                type: stream
+                path: "%kernel.logs_dir%/%kernel.environment%.chatbot.log"
+                level: debug
+                channels: ["chatbot"]
             main:
                 type: stream
                 path: "%kernel.logs_dir%/%kernel.environment%.log"
                 level: debug
-                channels: ["!event", "!bpn", "!core", "!auth", "!admin"]
+                channels: ["!event", "!bpn", "!core", "!auth", "!admin", "!chatbot"]
             # uncomment to get logging in your browser
             # you may have to allow bigger header sizes in your Web server configuration
             #firephp:
@@ -96,13 +102,20 @@ when@prod: &prod_config
                 path: "%kernel.logs_dir%/%kernel.environment%.admin.log"
                 level: info
                 channels: ["admin"]
+            # MCP tool calls, file only: the log for judging search quality later.
+            chatbot:
+                type: rotating_file
+                max_files: 30
+                path: "%kernel.logs_dir%/%kernel.environment%.chatbot.log"
+                level: info
+                channels: ["chatbot"]
             main:
                 type: fingers_crossed
                 action_level: error
                 handler: nested
                 excluded_http_codes: [404, 405]
                 buffer_size: 50 # How many messages should be saved? Prevent memory leaks
-                channels: ["!bpn", "!core", "!auth", "!admin"]
+                channels: ["!bpn", "!core", "!auth", "!admin", "!chatbot"]
             nested:
                 type: rotating_file
                 path: "%kernel.logs_dir%/%kernel.environment%.framework.log"

config/packages/security.yaml

@@ -15,6 +15,11 @@ security:
                     mailjet:
                         password: '%env(MAILJET_WEBHOOK_BASIC_PASSWORD)%'
                         roles: [ ROLE_MAILJET_WEBHOOK ]
+        mcp_provider:
+            memory:
+                users:
+                    n8n:
+                        roles: [ ROLE_CHATBOT_MCP ]
 
     role_hierarchy:
         # ROLE_CUSTOMER_EXPERT gates the booking-draft and log surfaces, which used to be
@@ -45,6 +50,12 @@ security:
             provider: mailjet_webhook_provider
             http_basic:
                 realm: 'Mailjet Webhook'
+        mcp:
+            pattern: ^/mcp$
+            stateless: true
+            provider: mcp_provider
+            access_token:
+                token_handler: App\Security\McpAccessTokenHandler
         main:
             lazy: true
             provider: app_user_provider
@@ -58,6 +69,7 @@ security:
     # Note: Only the *first* access control that matches will be used
     access_control:
         - { path: ^/webhooks/mailjet/newsletter$, roles: ROLE_MAILJET_WEBHOOK, requires_channel: https }
+        - { path: ^/mcp$, roles: ROLE_CHATBOT_MCP, requires_channel: https }
         - { path: ^/authorize, roles: IS_AUTHENTICATED_REMEMBERED, requires_channel: https }
         - { path: ^/, roles: PUBLIC_ACCESS, requires_channel: https }
 

config/routes/mcp.yaml

@@ -0,0 +1,3 @@
+mcp:
+    resource: .
+    type: mcp

config/services.yaml

@@ -333,6 +333,15 @@ services:
                 - '@App\Dashboard\Widget\PendingRoleApprovalsWidgetProvider'
                 - '@App\Dashboard\Widget\RecentLogEntriesWidgetProvider'
 
+    App\ContentFeed\ContentFeedClient:
+      arguments:
+        $baseUrl: '%env(APP_CMS_API_BASE_URL)%'
+        $apiKey: '%env(APP_CMS_API_KEY)%'
+
+    App\Security\McpAccessTokenHandler:
+      arguments:
+        $token: '%env(APP_MCP_TOKEN)%'
+
     App\Service\CmsDataProvider:
       arguments:
         $httpClient: '@typo3.client'