diff --git a/powerdnsadmin/decorators.py b/powerdnsadmin/decorators.py
index ed87d01..b57bc25 100644
--- a/powerdnsadmin/decorators.py
+++ b/powerdnsadmin/decorators.py
@@ -291,3 +291,13 @@ def dyndns_login_required(f):
         return f(*args, **kwargs)
 
     return decorated_function
+
+def apikey_or_basic_auth(f):
+    @wraps(f)
+    def decorated_function(*args, **kwargs):
+        api_auth_header = request.headers.get('X-API-KEY')
+        if api_auth_header:
+            return apikey_auth(f)(*args, **kwargs)
+        else:
+            return api_basic_auth(f)(*args, **kwargs)
+    return decorated_function
diff --git a/powerdnsadmin/routes/api.py b/powerdnsadmin/routes/api.py
index 51623b9..fe7a38f 100644
--- a/powerdnsadmin/routes/api.py
+++ b/powerdnsadmin/routes/api.py
@@ -24,6 +24,7 @@ from ..lib.errors import (
 from ..decorators import (
     api_basic_auth, api_can_create_domain, is_json, apikey_auth,
     apikey_is_admin, apikey_can_access_domain, api_role_can,
+    apikey_or_basic_auth,
 )
 import random
 import string
@@ -987,7 +988,7 @@ def api_server_config_forward(server_id):
 
 # The endpoint to snychronize Domains in background
 @api_bp.route('/sync_domains', methods=['GET'])
-@apikey_auth
+@apikey_or_basic_auth
 def sync_domains():
     domain = Domain()
     domain.update()