diff --git a/apps/authentication/backends/api.py b/apps/authentication/backends/api.py
index 599351d0a..b61798695 100644
--- a/apps/authentication/backends/api.py
+++ b/apps/authentication/backends/api.py
@@ -106,6 +106,9 @@ class AccessKeyAuthentication(authentication.BaseAuthentication):
             raise exceptions.AuthenticationFailed(_('User disabled.'))
         return access_key.user, None
 
+    def authenticate_header(self, request):
+        return 'Sign access_key_id:Signature'
+
 
 class AccessTokenAuthentication(authentication.BaseAuthentication):
     keyword = 'Bearer'
@@ -143,6 +146,9 @@ class AccessTokenAuthentication(authentication.BaseAuthentication):
             raise exceptions.AuthenticationFailed(msg)
         return user, None
 
+    def authenticate_header(self, request):
+        return self.keyword
+
 
 class PrivateTokenAuthentication(authentication.TokenAuthentication):
     model = PrivateToken