diff --git a/modules/yieldmoBidAdapter.js b/modules/yieldmoBidAdapter.js
index a0d634e34b4..bcc0c0a9570 100644
--- a/modules/yieldmoBidAdapter.js
+++ b/modules/yieldmoBidAdapter.js
@@ -23,9 +23,11 @@ const BIDDER_CODE = 'yieldmo';
 const CURRENCY = 'USD';
 const TIME_TO_LIVE = 300;
 const NET_REVENUE = true;
-const BANNER_SERVER_ENDPOINT = 'https://ads.yieldmo.com/exchange/prebid';
-const VIDEO_SERVER_ENDPOINT = 'https://ads.yieldmo.com/exchange/prebidvideo';
 const PB_COOKIE_ASSIST_SYNC_ENDPOINT = `https://ads.yieldmo.com/pbcas`;
+const BANNER_PATH = '/exchange/prebid';
+const VIDEO_PATH = '/exchange/prebidvideo';
+const STAGE_DOMAIN = 'https://ads-stg.yieldmo.com';
+const PROD_DOMAIN = 'https://ads.yieldmo.com';
 const OUTSTREAM_VIDEO_PLAYER_URL = 'https://prebid-outstream.yieldmo.com/bundle.js';
 const OPENRTB_VIDEO_BIDPARAMS = ['mimes', 'startdelay', 'placement', 'startdelay', 'skipafter', 'protocols', 'api',
   'playbackmethod', 'maxduration', 'minduration', 'pos', 'skip', 'skippable'];
@@ -59,6 +61,9 @@ export const spec = {
    * @return ServerRequest Info describing the request to the server.
    */
   buildRequests: function (bidRequests, bidderRequest) {
+    const stage = isStage(bidderRequest);
+    const bannerUrl = getAdserverUrl(BANNER_PATH, stage);
+    const videoUrl = getAdserverUrl(VIDEO_PATH, stage);
     const bannerBidRequests = bidRequests.filter(request => hasBannerMediaType(request));
     const videoBidRequests = bidRequests.filter(request => hasVideoMediaType(request));
     let serverRequests = [];
@@ -122,8 +127,8 @@ export const spec = {
         serverRequest.eids = JSON.stringify(eids);
       };
       // check if url exceeded max length
-      const url = `${BANNER_SERVER_ENDPOINT}?${parseQueryStringParameters(serverRequest)}`;
-      let extraCharacters = url.length - MAX_BANNER_REQUEST_URL_LENGTH;
+      const fullUrl = `${bannerUrl}?${parseQueryStringParameters(serverRequest)}`;
+      let extraCharacters = fullUrl.length - MAX_BANNER_REQUEST_URL_LENGTH;
       if (extraCharacters > 0) {
         for (let i = 0; i < BANNER_REQUEST_PROPERTIES_TO_REDUCE.length; i++) {
           extraCharacters = shortcutProperty(extraCharacters, serverRequest, BANNER_REQUEST_PROPERTIES_TO_REDUCE[i]);
@@ -136,7 +141,7 @@ export const spec = {
 
       serverRequests.push({
         method: 'GET',
-        url: BANNER_SERVER_ENDPOINT,
+        url: bannerUrl,
         data: serverRequest
       });
     }
@@ -148,7 +153,7 @@ export const spec = {
       };
       serverRequests.push({
         method: 'POST',
-        url: VIDEO_SERVER_ENDPOINT,
+        url: videoUrl,
         data: serverRequest
       });
     }
@@ -661,3 +666,12 @@ function canAccessTopWindow() {
     return false;
   }
 }
+
+function isStage(bidderRequest) {
+  return !!bidderRequest.refererInfo?.referer?.includes('pb_force_a');
+}
+
+function getAdserverUrl(path, stage) {
+  const domain = stage ? STAGE_DOMAIN : PROD_DOMAIN;
+  return `${domain}${path}`;
+}