diff --git a/modules/spotxBidAdapter.js b/modules/spotxBidAdapter.js
index f3728058d18..b60d25db4d6 100644
--- a/modules/spotxBidAdapter.js
+++ b/modules/spotxBidAdapter.js
@@ -291,9 +291,10 @@ export const spec = {
       if (!utils.isEmpty(userExt)) {
         requestPayload.user = { ext: userExt };
       }
+      const urlQueryParams = 'src_sys=prebid'
       return {
         method: 'POST',
-        url: URL + channelId,
+        url: URL + channelId + '?' + urlQueryParams,
         data: requestPayload,
         bidRequest: bidderRequest
       };
diff --git a/test/spec/modules/spotxBidAdapter_spec.js b/test/spec/modules/spotxBidAdapter_spec.js
index cc94e37fdaa..5d7b32eaeeb 100644
--- a/test/spec/modules/spotxBidAdapter_spec.js
+++ b/test/spec/modules/spotxBidAdapter_spec.js
@@ -102,7 +102,7 @@ describe('the spotx adapter', function () {
     it('should build a very basic request', function() {
       var request = spec.buildRequests([bid], bidRequestObj)[0];
       expect(request.method).to.equal('POST');
-      expect(request.url).to.equal('https://search.spotxchange.com/openrtb/2.3/dados/12345');
+      expect(request.url).to.equal('https://search.spotxchange.com/openrtb/2.3/dados/12345?src_sys=prebid');
       expect(request.bidRequest).to.equal(bidRequestObj);
       expect(request.data.id).to.equal(12345);
       expect(request.data.ext.wrap_response).to.equal(1);