diff --git a/app.py b/app.py
index b63c574..19b2d80 100644
--- a/app.py
+++ b/app.py
@@ -20,6 +20,7 @@ DATABASE_URL = os.environ.get("TUXFLOTTE_DATABASE_URL")
 AGENT_POLL_INTERVAL_SECONDS = int(os.environ.get("TUXFLOTTE_AGENT_POLL_INTERVAL", "300"))
 ANSIBLE_CONTENT_REPO = os.environ.get("TUXFLOTTE_ANSIBLE_CONTENT_REPO", "")
 ADMIN_TOKEN = os.environ.get("TUXFLOTTE_ADMIN_TOKEN", "")
+KUNDENPLATTFORM_TOKEN = os.environ.get("TUXFLOTTE_KUNDENPLATTFORM_TOKEN", "")
 AGENT_REPORTABLE_EVENT_TYPES = {"applied", "apply_failed", "removed", "remove_failed"}
 app = FastAPI(title="Provisioning Activation Server", version="0.1.0")
 
@@ -333,16 +334,26 @@ def fetch_templates(organization_id: str) -> list[dict]:
         for row in rows
     ]
 
-def require_admin_token(authorization: str | None) -> bool:
-    if not ADMIN_TOKEN:
-        return False
+def require_service_token(authorization: str | None) -> bool:
+    """
+    Akzeptiert entweder den Betreiber-Admin-Token oder das separate
+    Kundenplattform-Service-Token (siehe ADR-0011) - beide dürfen die
+    Auftragskatalog-Endpoints aufrufen, Kompromittierung/Rotation des einen
+    betrifft den anderen nicht.
+    """
 
     if authorization is None or not authorization.startswith("Bearer "):
         return False
 
     provided_token = authorization.removeprefix("Bearer ")
 
-    return hmac.compare_digest(provided_token, ADMIN_TOKEN)
+    if ADMIN_TOKEN and hmac.compare_digest(provided_token, ADMIN_TOKEN):
+        return True
+
+    if KUNDENPLATTFORM_TOKEN and hmac.compare_digest(provided_token, KUNDENPLATTFORM_TOKEN):
+        return True
+
+    return False
 
 def hash_agent_secret(secret: str) -> str:
     return hashlib.sha256(secret.encode("utf-8")).hexdigest()
@@ -558,6 +569,36 @@ def set_auftrag_selection(device_id: str, merkmal_key: str, aktiv: bool, optione
 
     return True
 
+def fetch_devices_for_organization(organization_id: str):
+    """
+    Für Kundenplattforms Geräteliste + Besitz-Validierung (siehe ADR-0011):
+    alle Geräte einer Organisation, unabhängig von Bereitstellungsvorlagen-
+    Zuweisung.
+    """
+
+    with get_database_connection() as conn:
+        with conn.cursor() as cur:
+            cur.execute(
+                """
+                SELECT id, hostname, device_fingerprint, agent_last_checkin
+                FROM devices
+                WHERE organization_id = %s
+                ORDER BY hostname NULLS LAST, created_at
+                """,
+                (organization_id,),
+            )
+            return [
+                {
+                    "id": str(device_id),
+                    "hostname": hostname,
+                    "device_fingerprint": fingerprint,
+                    "agent_last_checkin": (
+                        last_checkin.isoformat() if last_checkin is not None else None
+                    ),
+                }
+                for device_id, hostname, fingerprint, last_checkin in cur.fetchall()
+            ]
+
 @app.get("/health")
 def health():
     return {
@@ -848,12 +889,27 @@ def agent_report(
     return {"success": True}
 
 
+@app.get("/api/v1/organizations/{organization_id}/devices")
+def get_organization_devices(
+    organization_id: str,
+    authorization: str | None = Header(default=None),
+):
+    if not require_service_token(authorization):
+        return {
+            "success": False,
+            "error": "unauthorized",
+            "message": "Fehlendes oder ungültiges Service-Token.",
+        }
+
+    return {"success": True, "devices": fetch_devices_for_organization(organization_id)}
+
+
 @app.get("/api/v1/devices/{device_id}/auftragskatalog")
 def get_device_auftragskatalog(
     device_id: str,
     authorization: str | None = Header(default=None),
 ):
-    if not require_admin_token(authorization):
+    if not require_service_token(authorization):
         return {
             "success": False,
             "error": "unauthorized",
@@ -879,7 +935,7 @@ def select_auftrag(
     payload: AuftragSelectRequest,
     authorization: str | None = Header(default=None),
 ):
-    if not require_admin_token(authorization):
+    if not require_service_token(authorization):
         return {
             "success": False,
             "error": "unauthorized",
@@ -902,7 +958,7 @@ def deselect_auftrag(
     merkmal_key: str,
     authorization: str | None = Header(default=None),
 ):
-    if not require_admin_token(authorization):
+    if not require_service_token(authorization):
         return {
             "success": False,
             "error": "unauthorized",