diff --git a/modules/pubxBidAdapter.js b/modules/pubxBidAdapter.js
index 17c4ba3848e..ee28d549475 100644
--- a/modules/pubxBidAdapter.js
+++ b/modules/pubxBidAdapter.js
@@ -1,4 +1,4 @@
-import { deepSetValue } from '../src/utils.js';
+import { deepSetValue, deepAccess } from '../src/utils.js';
 import { registerBidder } from '../src/adapters/bidderFactory.js';
 
 const BIDDER_CODE = 'pubx';
@@ -16,8 +16,11 @@ export const spec = {
       const bidId = bidRequest.bidId;
       const params = bidRequest.params;
       const sid = params.sid;
+      const pageUrl = deepAccess(bidRequest, 'ortb2.site.page').replace(/\?.*$/, '');
+      const pageEnc = encodeURIComponent(pageUrl);
       const payload = {
-        sid: sid
+        sid: sid,
+        pu: pageEnc,
       };
       return {
         id: bidId,
diff --git a/test/spec/modules/pubxBidAdapter_spec.js b/test/spec/modules/pubxBidAdapter_spec.js
index 06bb5b5f638..b387264bf91 100644
--- a/test/spec/modules/pubxBidAdapter_spec.js
+++ b/test/spec/modules/pubxBidAdapter_spec.js
@@ -39,14 +39,22 @@ describe('pubxAdapter', function () {
         id: '26c1ee0038ac11',
         params: {
           sid: '12345abc'
+        },
+        ortb2: {
+          site: {
+            page: `${location.href}?test=1`
+          }
         }
       }
     ];
 
     const data = {
       banner: {
-        sid: '12345abc'
-      }
+        sid: '12345abc',
+        pu: encodeURIComponent(
+          utils.deepAccess(bidRequests[0], 'ortb2.site.page').replace(/\?.*$/, '')
+        ),
+      },
     };
 
     it('sends bid request to ENDPOINT via GET', function () {