diff --git a/amarillo/routers/carpool.py b/amarillo/routers/carpool.py
index a9c7b28..6aa4135 100644
--- a/amarillo/routers/carpool.py
+++ b/amarillo/routers/carpool.py
@@ -5,7 +5,8 @@ import os.path
 import re
 from glob import glob
 
-from fastapi import APIRouter, Body, HTTPException, status, Depends
+from fastapi import APIRouter, Body, HTTPException, status, Depends, BackgroundTasks
+import requests
 from datetime import datetime
 
 from amarillo.models.Carpool import Carpool
@@ -13,6 +14,8 @@ from amarillo.models.User import User
 from amarillo.services.oauth2 import get_current_user, verify_permission
 from amarillo.tests.sampledata import examples
 
+from amarillo.services.config import config
+from amarillo.utils.utils import assert_folder_exists
 
 logger = logging.getLogger(__name__)
 
@@ -21,6 +24,20 @@ router = APIRouter(
     tags=["carpool"]
 )
 
+#TODO: housekeeping for outdated trips
+
+def enhance_trip(carpool: Carpool):
+    response = requests.post(f"{config.enhancer_url}", carpool.model_dump_json())
+    enhanced_carpool = Carpool(**json.loads(response.content))
+
+    #TODO: use data/enhanced directory
+    folder = f'data/enhanced/{carpool.agency}'
+    filename = f'{folder}/{carpool.id}.json'
+
+    assert_folder_exists(folder)
+    with open(filename, 'w', encoding='utf-8') as f:
+        f.write(enhanced_carpool.model_dump_json())
+
 @router.post("/",
              operation_id="addcarpool",
              summary="Add a new or update existing carpool",
@@ -32,7 +49,7 @@ router = APIRouter(
                      "description": "Agency does not exist"},
                  
                 })
-async def post_carpool(carpool: Carpool = Body(..., examples=examples),
+async def post_carpool(background_tasks: BackgroundTasks, carpool: Carpool = Body(..., examples=examples),
                        requesting_user: User = Depends(get_current_user)) -> Carpool:
     verify_permission(f"{carpool.agency}:write", requesting_user)
 
@@ -41,6 +58,8 @@ async def post_carpool(carpool: Carpool = Body(..., examples=examples),
 
     await store_carpool(carpool)
 
+    background_tasks.add_task(enhance_trip, carpool)
+
     return carpool
     
 # TODO 403
@@ -91,7 +110,11 @@ async def _delete_carpool(agency_id: str, carpool_id: str):
     # load and store, to receive pyinotify events and have file timestamp updated
     await save_carpool(cp, 'data/trash')
     logger.info(f"Saved carpool {agency_id}:{carpool_id} in trash.")
-    os.remove(f"data/carpool/{agency_id}/{carpool_id}.json")
+    try:
+        os.remove(f"data/carpool/{agency_id}/{carpool_id}.json")
+        os.remove(f"data/enhanced/{agency_id}/{carpool_id}.json", )
+    except FileNotFoundError:
+        pass
 
     try:
         from amarillo.plugins.metrics import trips_deleted_counter
diff --git a/amarillo/services/config.py b/amarillo/services/config.py
index 316e95a..7a28c6a 100644
--- a/amarillo/services/config.py
+++ b/amarillo/services/config.py
@@ -8,5 +8,6 @@ class Config(BaseSettings):
     env: str = 'DEV'
     graphhopper_base_url: str = 'https://api.mfdz.de/gh'
     stop_sources_file: str = 'data/stop_sources.json'
+    enhancer_url: str = 'http://localhost:8001'
 
 config = Config(_env_file='config', _env_file_encoding='utf-8')
diff --git a/amarillo/services/users.py b/amarillo/services/users.py
index 42338a8..ed34a05 100644
--- a/amarillo/services/users.py
+++ b/amarillo/services/users.py
@@ -65,6 +65,7 @@ class UserService:
         logger.error(message)
         raise HTTPException(status_code=400, detail=message)
 
+    #TODO: fix duplicate None api key
     def add(self, user_conf: User):
 
         user_id = user_conf.user_id