diff --git a/modules/prebidServerBidAdapter.js b/modules/prebidServerBidAdapter.js
index 06e5cff6503..d60cf5e1025 100644
--- a/modules/prebidServerBidAdapter.js
+++ b/modules/prebidServerBidAdapter.js
@@ -325,6 +325,7 @@ const LEGACY_PROTOCOL = {
 
   interpretResponse(result, bidRequests, requestedBidders) {
     const bids = [];
+    let responseTimes = {};
 
     if (result.status === 'OK' || result.status === 'no_cookie') {
       if (result.bidder_status) {
@@ -335,6 +336,8 @@ const LEGACY_PROTOCOL = {
           if (bidder.error) {
             utils.logWarn(`Prebid Server returned error: '${bidder.error}' for ${bidder.bidder}`);
           }
+
+          responseTimes[bidder.bidder] = bidder.response_time_ms;
         });
       }
 
@@ -357,6 +360,9 @@ const LEGACY_PROTOCOL = {
           bidObject.creative_id = bidObj.creative_id;
           bidObject.bidderCode = bidObj.bidder;
           bidObject.cpm = cpm;
+          if (responseTimes[bidObj.bidder]) {
+            bidObject.serverResponseTimeMs = responseTimes[bidObj.bidder];
+          }
           if (bidObj.cache_id) {
             bidObject.cache_id = bidObj.cache_id;
           }
@@ -523,6 +529,11 @@ const OPEN_RTB_PROTOCOL = {
           bidObject.bidderCode = seatbid.seat;
           bidObject.cpm = cpm;
 
+          let serverResponseTimeMs = utils.deepAccess(response, ['ext', 'responsetimemillis', seatbid.seat].join('.'));
+          if (serverResponseTimeMs) {
+            bidObject.serverResponseTimeMs = serverResponseTimeMs;
+          }
+
           if (utils.deepAccess(bid, 'ext.prebid.type') === VIDEO) {
             bidObject.mediaType = VIDEO;
             if (bid.adm) { bidObject.vastXml = bid.adm; }
diff --git a/modules/rubiconAnalyticsAdapter.js b/modules/rubiconAnalyticsAdapter.js
index 32d1a79af5c..dd111efe03c 100644
--- a/modules/rubiconAnalyticsAdapter.js
+++ b/modules/rubiconAnalyticsAdapter.js
@@ -111,6 +111,7 @@ function sendMessage(auctionId, bidWonId) {
           ? 'server' : 'client'
       },
       'clientLatencyMillis',
+      'serverLatencyMillis',
       'params',
       'bidResponse', bidResponse => bidResponse ? _pick(bidResponse, [
         'bidPriceUSD',
@@ -386,6 +387,9 @@ let rubiconAdapter = Object.assign({}, baseAdapter, {
             };
         }
         bid.clientLatencyMillis = Date.now() - cache.auctions[args.auctionId].timestamp;
+        if (typeof args.serverResponseTimeMs !== 'undefined') {
+          bid.serverLatencyMillis = args.serverResponseTimeMs;
+        }
         bid.bidResponse = parseBidResponse(args);
         break;
       case BIDDER_DONE:
diff --git a/test/spec/modules/prebidServerBidAdapter_spec.js b/test/spec/modules/prebidServerBidAdapter_spec.js
index d525db857bc..427083beb17 100644
--- a/test/spec/modules/prebidServerBidAdapter_spec.js
+++ b/test/spec/modules/prebidServerBidAdapter_spec.js
@@ -595,6 +595,7 @@ describe('S2S Adapter', () => {
       expect(response).to.have.property('cache_id', '7654321');
       expect(response).to.have.property('cache_url', 'http://www.test.com/cache?uuid=7654321');
       expect(response).to.not.have.property('vastUrl');
+      expect(response).to.have.property('serverResponseTimeMs', 52);
     });
 
     it('registers video bids', () => {
@@ -787,6 +788,7 @@ describe('S2S Adapter', () => {
       expect(response).to.have.property('bidderCode', 'appnexus');
       expect(response).to.have.property('adId', '123');
       expect(response).to.have.property('cpm', 0.5);
+      expect(response).to.have.property('serverResponseTimeMs', 8);
     });
 
     it('handles OpenRTB video responses', () => {
@@ -807,6 +809,7 @@ describe('S2S Adapter', () => {
       expect(response).to.have.property('bidderCode', 'appnexus');
       expect(response).to.have.property('adId', '123');
       expect(response).to.have.property('cpm', 10);
+      expect(response).to.have.property('serverResponseTimeMs', 81);
     });
 
     it('should log warning for unsupported bidder', () => {
diff --git a/test/spec/modules/rubiconAnalyticsAdapter_spec.js b/test/spec/modules/rubiconAnalyticsAdapter_spec.js
index d8f0811e81c..38f8b726cd1 100644
--- a/test/spec/modules/rubiconAnalyticsAdapter_spec.js
+++ b/test/spec/modules/rubiconAnalyticsAdapter_spec.js
@@ -84,6 +84,8 @@ const BID2 = Object.assign({}, BID, {
   height: 90,
   mediaType: 'banner',
   cpm: 1.52,
+  source: 'server',
+  serverResponseTimeMs: 42,
   rubiconTargeting: {
     'rpfl_elemid': '/19968336/header-bid-tag1',
     'rpfl_14062': '2_tier0100'
@@ -93,7 +95,7 @@ const BID2 = Object.assign({}, BID, {
     'hb_adid': '3bd4ebb1c900e2',
     'hb_pb': '1.500',
     'hb_size': '728x90',
-    'hb_source': 'client'
+    'hb_source': 'server'
   }
 });
 
@@ -103,7 +105,7 @@ const MOCK = {
     [BID2.adUnitCode]: BID2.adserverTargeting
   },
   AUCTION_INIT: {
-    'timestamp': 1519149536560,
+    'timestamp': 1519767010567,
     'auctionId': '25c6d7f5-699a-4bfc-87c9-996f915341fa',
     'timeout': 3000
   },
@@ -237,7 +239,7 @@ const ANALYTICS_MESSAGE = {
               'bidId': '2ecff0db240757',
               'status': 'success',
               'source': 'client',
-              'clientLatencyMillis': 617477221,
+              'clientLatencyMillis': 3214,
               'params': {
                 'accountId': '14062',
                 'siteId': '70608',
@@ -280,15 +282,16 @@ const ANALYTICS_MESSAGE = {
             'hb_adid': '3bd4ebb1c900e2',
             'hb_pb': '1.500',
             'hb_size': '728x90',
-            'hb_source': 'client'
+            'hb_source': 'server'
           },
           'bids': [
             {
               'bidder': 'rubicon',
               'bidId': '3bd4ebb1c900e2',
               'status': 'success',
-              'source': 'client',
-              'clientLatencyMillis': 617477221,
+              'source': 'server',
+              'clientLatencyMillis': 3214,
+              'serverLatencyMillis': 42,
               'params': {
                 'accountId': '14062',
                 'siteId': '70608',
@@ -316,7 +319,7 @@ const ANALYTICS_MESSAGE = {
       'bidId': '2ecff0db240757',
       'status': 'success',
       'source': 'client',
-      'clientLatencyMillis': 617477221,
+      'clientLatencyMillis': 3214,
       'samplingFactor': 1,
       'accountId': 1001,
       'params': {
@@ -351,8 +354,9 @@ const ANALYTICS_MESSAGE = {
       'adUnitCode': '/19968336/header-bid-tag1',
       'bidId': '3bd4ebb1c900e2',
       'status': 'success',
-      'source': 'client',
-      'clientLatencyMillis': 617477221,
+      'source': 'server',
+      'clientLatencyMillis': 3214,
+      'serverLatencyMillis': 42,
       'samplingFactor': 1,
       'accountId': 1001,
       'params': {
@@ -368,7 +372,7 @@ const ANALYTICS_MESSAGE = {
         'hb_adid': '3bd4ebb1c900e2',
         'hb_pb': '1.500',
         'hb_size': '728x90',
-        'hb_source': 'client'
+        'hb_source': 'server'
       },
       'bidResponse': {
         'bidPriceUSD': 1.52,