diff --git a/modules/adagioBidAdapter.js b/modules/adagioBidAdapter.js
index ac2e578de5c9..e3b257730615 100644
--- a/modules/adagioBidAdapter.js
+++ b/modules/adagioBidAdapter.js
@@ -1,5 +1,6 @@
 import {find} from '../src/polyfill.js';
 import {
+  canAccessWindowTop,
   cleanObj,
   deepAccess,
   deepClone,
@@ -8,17 +9,18 @@ import {
   getUniqueIdentifierStr,
   getWindowSelf,
   getWindowTop,
-  inIframe,
   isArray,
+  isArrayOfNums,
   isFn,
+  inIframe,
   isInteger,
   isNumber,
-  isArrayOfNums,
+  isSafeFrameWindow,
+  isStr,
   logError,
   logInfo,
   logWarn,
   mergeDeep,
-  isStr,
 } from '../src/utils.js';
 import {config} from '../src/config.js';
 import {registerBidder} from '../src/adapters/bidderFactory.js';
@@ -104,13 +106,15 @@ export const GlobalExchange = (function() {
     getOrSetGlobalFeatures: function () {
       if (!features) {
         features = {
+          type: 'bidAdapter',
           page_dimensions: getPageDimensions().toString(),
           viewport_dimensions: getViewPortDimensions().toString(),
           user_timestamp: getTimestampUTC().toString(),
           dom_loading: getDomLoadingDuration().toString(),
         }
       }
-      return features;
+
+      return { ...features };
     },
 
     prepareExchangeData(storageValue) {
@@ -130,7 +134,7 @@ export const GlobalExchange = (function() {
       const data = {
         session: {
           new: newSession,
-          rnd: random
+          rnd: random,
         }
       }
 
@@ -149,6 +153,9 @@ export const GlobalExchange = (function() {
   };
 })();
 
+/**
+ * @deprecated will be removed in Prebid.js 9.
+ */
 export function adagioScriptFromLocalStorageCb(ls) {
   try {
     if (!ls) {
@@ -179,6 +186,9 @@ export function adagioScriptFromLocalStorageCb(ls) {
   }
 }
 
+/**
+ * @deprecated will be removed in Prebid.js 9.
+ */
 export function getAdagioScript() {
   storage.getDataFromLocalStorage(ADAGIO_LOCALSTORAGE_KEY, (ls) => {
     internal.adagioScriptFromLocalStorageCb(ls);
@@ -204,31 +214,14 @@ export function getAdagioScript() {
   });
 }
 
-function canAccessTopWindow() {
-  try {
-    if (getWindowTop().location.href) {
-      return true;
-    }
-  } catch (error) {
-    return false;
-  }
-}
-
 function getCurrentWindow() {
   return currentWindow || getWindowSelf();
 }
 
-function isSafeFrameWindow() {
-  const ws = getWindowSelf();
-  return !!(ws.$sf && ws.$sf.ext);
-}
-
 function initAdagio() {
-  if (canAccessTopWindow()) {
-    currentWindow = (canAccessTopWindow()) ? getWindowTop() : getWindowSelf();
-  }
+  currentWindow = (canAccessWindowTop()) ? getWindowTop() : getWindowSelf();
 
-  const w = internal.getCurrentWindow();
+  const w = currentWindow;
 
   w.ADAGIO = w.ADAGIO || {};
   w.ADAGIO.adUnits = w.ADAGIO.adUnits || {};
@@ -240,13 +233,16 @@ function initAdagio() {
 
   storage.getDataFromLocalStorage('adagio', (storageData) => {
     try {
-      GlobalExchange.prepareExchangeData(storageData);
+      if (w.ADAGIO.hasRtd !== true) {
+        logInfo(`${LOG_PREFIX} RTD module not found. Loading external script from adagioBidAdapter is deprecated and will be removed in Prebid.js 9.`);
+
+        GlobalExchange.prepareExchangeData(storageData);
+        getAdagioScript();
+      }
     } catch (e) {
       logError(LOG_PREFIX, e);
     }
   });
-
-  getAdagioScript();
 }
 
 function enqueue(ob) {
@@ -359,6 +355,12 @@ function setPlayerName(bidRequest) {
   return playerName;
 }
 
+function hasRtd() {
+  const w = internal.getCurrentWindow();
+
+  return !!(w.ADAGIO && w.ADAGIO.hasRtd);
+};
+
 export const internal = {
   enqueue,
   getPageviewId,
@@ -368,9 +370,10 @@ export const internal = {
   getRefererInfo,
   adagioScriptFromLocalStorageCb,
   getCurrentWindow,
-  canAccessTopWindow,
+  canAccessWindowTop,
   isRendererPreferredFromPublisher,
-  isNewSession
+  isNewSession,
+  hasRtd
 };
 
 function _getGdprConsent(bidderRequest) {
@@ -685,7 +688,7 @@ function autoFillParams(bid) {
 }
 
 function getPageDimensions() {
-  if (isSafeFrameWindow() || !canAccessTopWindow()) {
+  if (isSafeFrameWindow() || !canAccessWindowTop()) {
     return '';
   }
 
@@ -708,7 +711,7 @@ function getPageDimensions() {
  * @returns
  */
 function getViewPortDimensions() {
-  if (!isSafeFrameWindow() && !canAccessTopWindow()) {
+  if (!isSafeFrameWindow() && !canAccessWindowTop()) {
     return '';
   }
 
@@ -746,7 +749,7 @@ function getSlotPosition(adUnitElementId) {
     return '';
   }
 
-  if (!isSafeFrameWindow() && !canAccessTopWindow()) {
+  if (!isSafeFrameWindow() && !canAccessWindowTop()) {
     return '';
   }
 
@@ -769,7 +772,7 @@ function getSlotPosition(adUnitElementId) {
 
     position.x = Math.round(sfGeom.t);
     position.y = Math.round(sfGeom.l);
-  } else if (canAccessTopWindow()) {
+  } else if (canAccessWindowTop()) {
     try {
       // window.top based computing
       const wt = getWindowTop();
@@ -823,14 +826,6 @@ function getTimestampUTC() {
   return Math.floor(new Date().getTime() / 1000) - new Date().getTimezoneOffset() * 60;
 }
 
-function getPrintNumber(adUnitCode, bidderRequest) {
-  if (!bidderRequest.bids || !bidderRequest.bids.length) {
-    return 1;
-  }
-  const adagioBid = find(bidderRequest.bids, bid => bid.adUnitCode === adUnitCode);
-  return adagioBid.bidderRequestsCount || 1;
-}
-
 /**
  * domLoading feature is computed on window.top if reachable.
  */
@@ -838,7 +833,7 @@ function getDomLoadingDuration() {
   let domLoadingDuration = -1;
   let performance;
 
-  performance = (canAccessTopWindow()) ? getWindowTop().performance : getWindowSelf().performance;
+  performance = (canAccessWindowTop()) ? getWindowTop().performance : getWindowSelf().performance;
 
   if (performance && performance.timing && performance.timing.navigationStart > 0) {
     const val = performance.timing.domLoading - performance.timing.navigationStart;
@@ -958,6 +953,31 @@ const OUTSTREAM_RENDERER = {
   }
 };
 
+/**
+ *
+ * @param {*} bidRequest
+ * @returns
+ */
+const _getFeatures = (bidRequest) => {
+  const f = { ...deepAccess(bidRequest, 'ortb2.ext.features', GlobalExchange.getOrSetGlobalFeatures()) } || {};
+
+  f.print_number = deepAccess(bidRequest, 'bidderRequestsCount', 1).toString();
+
+  if (f.type === 'bidAdapter') {
+    f.adunit_position = getSlotPosition(bidRequest.params.adUnitElementId)
+  } else {
+    f.adunit_position = deepAccess(bidRequest, 'ortb2Imp.ext.data.adunit_position');
+  }
+
+  Object.keys(f).forEach((prop) => {
+    if (f[prop] === '') {
+      delete f[prop];
+    }
+  });
+
+  return f;
+}
+
 export const spec = {
   code: BIDDER_CODE,
   gvlid: GVLID,
@@ -986,6 +1006,7 @@ export const spec = {
     const device = internal.getDevice();
     const site = internal.getSite(bidderRequest);
     const pageviewId = internal.getPageviewId();
+    const hasRtd = internal.hasRtd();
     const gdprConsent = _getGdprConsent(bidderRequest) || {};
     const uspConsent = _getUspConsent(bidderRequest) || {};
     const coppa = _getCoppa();
@@ -998,6 +1019,9 @@ export const spec = {
     // We don't validate the dsa object in adapter and let our server do it.
     const dsa = deepAccess(bidderRequest, 'ortb2.regs.ext.dsa');
 
+    let rtdSamplingSession = deepAccess(bidderRequest, 'ortb2.ext.session');
+    const dataExchange = (rtdSamplingSession) ? { session: rtdSamplingSession } : GlobalExchange.getExchangeData();
+
     const aucId = generateUUID()
 
     const adUnits = validBidRequests.map(rawBidRequest => {
@@ -1006,13 +1030,6 @@ export const spec = {
       // Fix https://github.com/prebid/Prebid.js/issues/9781
       bidRequest.auctionId = aucId
 
-      const globalFeatures = GlobalExchange.getOrSetGlobalFeatures();
-      const features = {
-        ...globalFeatures,
-        print_number: getPrintNumber(bidRequest.adUnitCode, bidderRequest).toString(),
-        adunit_position: getSlotPosition(bidRequest.params.adUnitElementId) // adUnitElementId à déplacer ???
-      };
-
       // Force the Split Keyword to be a String
       if (bidRequest.params.splitKeyword) {
         if (isStr(bidRequest.params.splitKeyword) || isNumber(bidRequest.params.splitKeyword)) {
@@ -1056,23 +1073,20 @@ export const spec = {
         }
       }
 
-      Object.keys(features).forEach((prop) => {
-        if (features[prop] === '') {
-          delete features[prop];
-        }
-      });
-
+      const features = _getFeatures(bidRequest);
       bidRequest.features = features;
 
-      internal.enqueue({
-        action: 'features',
-        ts: Date.now(),
-        data: {
-          features: bidRequest.features,
-          params: bidRequest.params,
-          adUnitCode: bidRequest.adUnitCode
-        }
-      });
+      if (!hasRtd) {
+        internal.enqueue({
+          action: 'features',
+          ts: Date.now(),
+          data: {
+            features,
+            params: { ...bidRequest.params },
+            adUnitCode: bidRequest.adUnitCode
+          }
+        });
+      }
 
       // Handle priceFloors module
       // We need to use `rawBidRequest` as param because:
@@ -1127,8 +1141,10 @@ export const spec = {
         bidRequest.gpid = gpid;
       }
 
-      // store the whole bidRequest (adUnit) object in the ADAGIO namespace.
-      storeRequestInAdagioNS(bidRequest);
+      if (!hasRtd) {
+        // store the whole bidRequest (adUnit) object in the ADAGIO namespace.
+        storeRequestInAdagioNS(bidRequest);
+      }
 
       // Remove some params that are not needed on the server side.
       delete bidRequest.params.siteId;
@@ -1176,12 +1192,13 @@ export const spec = {
         url: ENDPOINT,
         data: {
           organizationId: organizationId,
+          hasRtd: hasRtd ? 1 : 0,
           secure: secure,
           device: device,
           site: site,
           pageviewId: pageviewId,
           adUnits: groupedAdUnits[organizationId],
-          data: GlobalExchange.getExchangeData(),
+          data: dataExchange,
           regs: {
             gdpr: gdprConsent,
             coppa: coppa,
diff --git a/src/utils.js b/src/utils.js
index 3225eac162ee..46dd06a6a417 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -41,6 +41,7 @@ export const internal = {
   createTrackPixelIframeHtml,
   getWindowSelf,
   getWindowTop,
+  canAccessWindowTop,
   getWindowLocation,
   insertUserSyncIframe,
   insertElement,
@@ -180,6 +181,16 @@ export function getWindowLocation() {
   return window.location;
 }
 
+export function canAccessWindowTop() {
+  try {
+    if (internal.getWindowTop().location.href) {
+      return true;
+    }
+  } catch (e) {
+    return false;
+  }
+}
+
 /**
  * Wrappers to console.(log | info | warn | error). Takes N arguments, the same as the native methods
  */
@@ -620,6 +631,18 @@ export function inIframe() {
   }
 }
 
+/**
+ * https://iabtechlab.com/wp-content/uploads/2016/03/SafeFrames_v1.1_final.pdf
+ */
+export function isSafeFrameWindow() {
+  if (!inIframe()) {
+    return false;
+  }
+
+  const ws = internal.getWindowSelf();
+  return !!(ws.$sf && ws.$sf.ext);
+}
+
 export function isSafariBrowser() {
   return /^((?!chrome|android|crios|fxios).)*safari/i.test(navigator.userAgent);
 }
diff --git a/test/spec/modules/adagioBidAdapter_spec.js b/test/spec/modules/adagioBidAdapter_spec.js
index b11c0ab4a8e6..1371c97dddfc 100644
--- a/test/spec/modules/adagioBidAdapter_spec.js
+++ b/test/spec/modules/adagioBidAdapter_spec.js
@@ -122,9 +122,6 @@ describe('Adagio bid adapter', () => {
     GlobalExchange.clearFeatures();
     GlobalExchange.clearExchangeData();
 
-    adagioMock = sinon.mock(adagio);
-    utilsMock = sinon.mock(utils);
-
     $$PREBID_GLOBAL$$.bidderSettings = {
       adagio: {
         storageAllowed: true
@@ -132,15 +129,14 @@ describe('Adagio bid adapter', () => {
     };
 
     sandbox = sinon.createSandbox();
+    adagioMock = sandbox.mock(adagio);
+    utilsMock = sandbox.mock(utils);
   });
 
   afterEach(() => {
     window.ADAGIO = undefined;
     $$PREBID_GLOBAL$$.bidderSettings = {};
 
-    adagioMock.restore();
-    utilsMock.restore();
-
     sandbox.restore();
   });
 
@@ -267,6 +263,7 @@ describe('Adagio bid adapter', () => {
       'schain',
       'prebidVersion',
       'featuresVersion',
+      'hasRtd',
       'data',
       'usIfr',
       'adgjs',
@@ -1625,7 +1622,7 @@ describe('Adagio bid adapter', () => {
 
   describe('Adagio features when prebid in crossdomain iframe', function() {
     it('should return all expected features', function() {
-      sandbox.stub(utils, 'getWindowTop').throws();
+      sandbox.stub(utils, 'canAccessWindowTop').returns(false);
 
       const bidRequest = new BidRequestBuilder({
         'mediaTypes': {
@@ -1669,7 +1666,7 @@ describe('Adagio bid adapter', () => {
     });
 
     it('should returns domain and page in a cross-domain w/ top domain reached context', function() {
-      sandbox.stub(utils, 'getWindowTop').throws();
+      sandbox.stub(utils, 'canAccessWindowTop').returns(false);
       sandbox.stub(utils, 'getWindowSelf').returns({
         document: {
           referrer: 'https://google.com'
@@ -1704,7 +1701,7 @@ describe('Adagio bid adapter', () => {
     });
 
     it('should return info in a cross-domain w/o top domain reached and w/o ancestor context', function() {
-      sandbox.stub(utils, 'getWindowTop').throws();
+      sandbox.stub(utils, 'canAccessWindowTop').returns(false);
 
       const info = {
         numIframes: 2,
diff --git a/test/spec/utils_spec.js b/test/spec/utils_spec.js
index 8ea68aadecc3..fb85b410bd94 100644
--- a/test/spec/utils_spec.js
+++ b/test/spec/utils_spec.js
@@ -21,6 +21,54 @@ describe('Utils', function () {
     type_array = 'Array',
     type_function = 'Function';
 
+  describe('canAccessWindowTop', function () {
+    let sandbox;
+
+    beforeEach(function () {
+      sandbox = sinon.sandbox.create();
+    });
+
+    afterEach(function () {
+      sandbox.restore();
+    });
+    it('should return true if window.top is accessible', function () {
+      assert.equal(utils.canAccessWindowTop(), true);
+    });
+
+    it('should return false if window.top is not accessible', function () {
+      sandbox.stub(utils.internal, 'getWindowTop').returns(false);
+      assert.equal(utils.canAccessWindowTop(), false);
+    });
+  });
+
+  describe('isSafeFrameWindow', function () {
+    // SafeFrames implementation
+    // https://iabtechlab.com/wp-content/uploads/2016/03/SafeFrames_v1.1_final.pdf
+    const $sf = {
+      ext: {
+        geom: function() {}
+      }
+    };
+
+    afterEach(function() {
+      delete window.$sf;
+    })
+
+    it('should return true if window.$sf is accessible', function () {
+      window.$sf = $sf;
+      assert.equal(utils.isSafeFrameWindow(), true);
+    });
+
+    it('should return false if window.$sf is missimplemented', function () {
+      window.$sf = {};
+      assert.equal(utils.isSafeFrameWindow(), false);
+    });
+
+    it('should return false if window.$sf is missing', function () {
+      assert.equal(utils.isSafeFrameWindow(), false);
+    });
+  });
+
   describe('getBidIdParameter', function () {
     it('should return value of the key in input object', function () {
       var obj = {