--- a/mercurial/configitems.py	Tue Mar 13 10:34:36 2018 -0700
+++ b/mercurial/configitems.py	Tue Mar 13 16:53:21 2018 -0700
@@ -580,6 +580,12 @@
 coreconfigitem('experimental', 'sshpeer.advertise-v2',
     default=False,
 )
+coreconfigitem('experimental', 'web.apiserver',
+    default=False,
+)
+coreconfigitem('experimental', 'web.api.http-v2',
+    default=False,
+)
 coreconfigitem('experimental', 'xdiff',
     default=False,
 )