diff --git a/readthedocs/core/signals.py b/readthedocs/core/signals.py
index a3e229656f3..aa2a30936c0 100644
--- a/readthedocs/core/signals.py
+++ b/readthedocs/core/signals.py
@@ -20,6 +20,7 @@
     '/api/v2/footer_html',
     '/api/v2/search',
     '/api/v2/docsearch',
+    '/api/v2/sustainability',
 ]
 
 
@@ -46,6 +47,10 @@ def decide_if_cors(sender, request, **kwargs):  # pylint: disable=unused-argumen
         if request.path_info.startswith(url):
             valid_url = True
 
+        # Don't do domain checking for this API for now
+        if request.path_info.startswith('/api/v2/sustainability'):
+            return True
+
     if valid_url:
         project_slug = request.GET.get('project', None)
         try: