diff --git a/jupyterhub/apihandlers/base.py b/jupyterhub/apihandlers/base.py
index 536dbbff..7b622606 100644
--- a/jupyterhub/apihandlers/base.py
+++ b/jupyterhub/apihandlers/base.py
@@ -103,7 +103,7 @@ class APIHandler(BaseHandler):
             'name': spawner.name,
             'last_activity': isoformat(spawner.orm_spawner.last_activity),
             'started': isoformat(spawner.orm_spawner.started),
-            'pending': spawner.pending,
+            'pending': spawner.pending or None,
             'url': url_path_join(spawner.user.url, spawner.name, '/'),
             'progress_url': spawner._progress_url,
         }
@@ -119,7 +119,7 @@ class APIHandler(BaseHandler):
             'admin': user.admin,
             'groups': [ g.name for g in user.groups ],
             'server': user.url if user.running else None,
-            'progress_url': user.spawner._progress_url if user.active else None,
+            'progress_url': user.progress_url(''),
             'pending': None,
             'created': isoformat(user.created),
             'started': None,
@@ -128,7 +128,7 @@ class APIHandler(BaseHandler):
         if '' in user.spawners:
             server_model = self.server_model(user.spawners[''])
             # copy some values from the default server to the user model
-            for key in ('started', 'pending', 'progress_url'):
+            for key in ('started', 'pending'):
                 model[key] = server_model[key]
 
         if self.allow_named_servers:
diff --git a/jupyterhub/tests/test_api.py b/jupyterhub/tests/test_api.py
index 5123236d..defc5e28 100644
--- a/jupyterhub/tests/test_api.py
+++ b/jupyterhub/tests/test_api.py
@@ -201,10 +201,17 @@ def normalize_user(user):
     """
     for key in ('created', 'last_activity', 'started'):
         user[key] = normalize_timestamp(user[key])
+    if user['progress_url']:
+        user['progress_url'] = re.sub(
+            r'.*/hub/api',
+            'PREFIX/hub/api',
+            user['progress_url'],
+        )
     if 'servers' in user:
         for server in user['servers'].values():
             for key in ('started', 'last_activity'):
                 server[key] = normalize_timestamp(server[key])
+            server['progress_url'] = re.sub(r'.*/hub/api', 'PREFIX/hub/api', server['progress_url'])
     return user
 
 def fill_user(model):
@@ -221,6 +228,7 @@ def fill_user(model):
     model.setdefault('created', TIMESTAMP)
     model.setdefault('last_activity', TIMESTAMP)
     model.setdefault('started', None)
+    model.setdefault('progress_url', 'PREFIX/hub/api/users/{name}/server/progress'.format(**model))
     return model
 
 
diff --git a/jupyterhub/tests/test_named_servers.py b/jupyterhub/tests/test_named_servers.py
index 78b1aa51..f6c1e757 100644
--- a/jupyterhub/tests/test_named_servers.py
+++ b/jupyterhub/tests/test_named_servers.py
@@ -41,6 +41,8 @@ def test_default_server(app, named_servers):
                 'started': TIMESTAMP,
                 'last_activity': TIMESTAMP,
                 'url': user.url,
+                'pending': None,
+                'progress_url': 'PREFIX/hub/api/users/{}/server/progress'.format(username),
             },
         },
     })
@@ -96,6 +98,9 @@ def test_create_named_server(app, named_servers):
                 'started': TIMESTAMP,
                 'last_activity': TIMESTAMP,
                 'url': url_path_join(user.url, name, '/'),
+                'pending': None,
+                'progress_url': 'PREFIX/hub/api/users/{}/servers/{}/progress'.format(
+                    username, servername),
             }
             for name in [servername]
         },
@@ -124,13 +129,7 @@ def test_delete_named_server(app, named_servers):
     assert user_model == fill_user({
         'name': username,
         'auth_state': None,
-        'servers': {
-            name: {
-                'name': name,
-                'url': url_path_join(user.url, name, '/'),
-            }
-            for name in []
-        },
+        'servers': {},
     })
 
 @pytest.mark.gen_test