diff --git a/perimeterx/px_api.py b/perimeterx/px_api.py
index 844c99d..df2769e 100644
--- a/perimeterx/px_api.py
+++ b/perimeterx/px_api.py
@@ -48,7 +48,8 @@ def prepare_risk_body(ctx, config):
             'http_version': ctx.get('http_version', ''),
             'module_version': config.get('module_version', ''),
             'risk_mode': config.get('module_mode', ''),
-            'px_cookie_hmac': ctx.get('cookie_hmac', '')
+            'px_cookie_hmac': ctx.get('cookie_hmac', ''),
+            'request_cookie_names': ctx.get('cookie_names', '')
         }
     }
 
diff --git a/perimeterx/px_context.py b/perimeterx/px_context.py
index 716becd..21fad3f 100644
--- a/perimeterx/px_context.py
+++ b/perimeterx/px_context.py
@@ -11,6 +11,7 @@ def build_context(environ, config):
     http_version = '1.1'
     http_protocol = 'http://'
     px_cookies = {}
+    request_cookie_names = list()
 
     # IP Extraction
     if config.get('ip_handler'):
@@ -37,6 +38,7 @@ def build_context(environ, config):
     cookie_keys = cookies.keys()
 
     for key in cookie_keys:
+        request_cookie_names.append(key)
         if key == PREFIX_PX_COOKIE_V1 or key == PREFIX_PX_COOKIE_V3:
             logger.debug('Found cookie prefix:' + key)
             px_cookies[key] = cookies.get(key).value
@@ -54,6 +56,7 @@ def build_context(environ, config):
         'full_url': full_url,
         'uri': uri,
         'hostname': hostname,
-        'px_cookies': px_cookies
+        'px_cookies': px_cookies,
+        'cookie_names': request_cookie_names
     }
     return ctx