diff --git a/modules/vidazooBidAdapter.js b/modules/vidazooBidAdapter.js
index b3ab8a4d275..d974c0e1eb7 100644
--- a/modules/vidazooBidAdapter.js
+++ b/modules/vidazooBidAdapter.js
@@ -1,6 +1,7 @@
 import * as utils from '../src/utils.js';
 import {registerBidder} from '../src/adapters/bidderFactory.js';
 import {BANNER} from '../src/mediaTypes.js';
+
 export const URL = 'https://prebid.cootlogix.com';
 const BIDDER_CODE = 'vidazoo';
 const CURRENCY = 'USD';
@@ -19,25 +20,29 @@ function isBidRequestValid(bid) {
   return !!(params.cId && params.pId);
 }
 
-function buildRequest(bid, topWindowUrl, size, bidderRequest) {
+function buildRequest(bid, topWindowUrl, sizes, bidderRequest) {
   const {params, bidId} = bid;
   const {bidFloor, cId, pId, ext} = params;
-  // Prebid's util function returns AppNexus style sizes (i.e. 300x250)
-  const [width, height] = size.split('x');
-
-  const dto = {
-    method: 'GET',
-    url: `${URL}/prebid/${cId}`,
-    data: {
-      url: encodeURIComponent(topWindowUrl),
-      cb: Date.now(),
-      bidFloor: bidFloor,
-      bidId: bidId,
-      publisherId: pId,
-      consent: bidderRequest.gdprConsent && bidderRequest.gdprConsent.consentString,
-      width,
-      height
+  let data = {
+    url: encodeURIComponent(topWindowUrl),
+    cb: Date.now(),
+    bidFloor: bidFloor,
+    bidId: bidId,
+    publisherId: pId,
+    sizes: sizes,
+  };
+  if (bidderRequest.gdprConsent) {
+    if (bidderRequest.gdprConsent.consentString) {
+      data.gdprConsent = bidderRequest.gdprConsent.consentString;
     }
+    if (bidderRequest.gdprConsent.gdprApplies !== undefined) {
+      data.gdpr = bidderRequest.gdprConsent.gdprApplies ? 1 : 0;
+    }
+  }
+  const dto = {
+    method: 'POST',
+    url: `${URL}/prebid/multi/${cId}`,
+    data: data
   };
 
   utils._each(ext, (value, key) => {
@@ -52,10 +57,8 @@ function buildRequests(validBidRequests, bidderRequest) {
   const requests = [];
   validBidRequests.forEach(validBidRequest => {
     const sizes = utils.parseSizesInput(validBidRequest.sizes);
-    sizes.forEach(size => {
-      const request = buildRequest(validBidRequest, topWindowUrl, size, bidderRequest);
-      requests.push(request);
-    });
+    const request = buildRequest(validBidRequest, topWindowUrl, sizes, bidderRequest);
+    requests.push(request);
   });
   return requests;
 }
@@ -64,23 +67,30 @@ function interpretResponse(serverResponse, request) {
   if (!serverResponse || !serverResponse.body) {
     return [];
   }
-  const {creativeId, ad, price, exp} = serverResponse.body;
-  if (!ad || !price) {
-    return [];
-  }
-  const {bidId, width, height} = request.data;
+  const {bidId} = request.data;
+  const {results} = serverResponse.body;
+
+  let output = [];
+
   try {
-    return [{
-      requestId: bidId,
-      cpm: price,
-      width: width,
-      height: height,
-      creativeId: creativeId,
-      currency: CURRENCY,
-      netRevenue: true,
-      ttl: exp || TTL_SECONDS,
-      ad: ad
-    }];
+    results.forEach(result => {
+      const {creativeId, ad, price, exp, width, height, currency} = result;
+      if (!ad || !price) {
+        return;
+      }
+      output.push({
+        requestId: bidId,
+        cpm: price,
+        width: width,
+        height: height,
+        creativeId: creativeId,
+        currency: currency || CURRENCY,
+        netRevenue: true,
+        ttl: exp || TTL_SECONDS,
+        ad: ad
+      })
+    });
+    return output;
   } catch (e) {
     return [];
   }
@@ -101,20 +111,18 @@ function getUserSyncs(syncOptions, responses) {
     const syncs = [];
     responses.forEach(response => {
       const {body} = response;
-      const cookies = body ? body.cookies || [] : [];
-      cookies.forEach(cookie => {
-        switch (cookie.type) {
-          case INTERNAL_SYNC_TYPE.IFRAME:
-            break;
-          case INTERNAL_SYNC_TYPE.IMAGE:
+      const results = body ? body.results || [] : [];
+      results.forEach(result => {
+        (result.cookies || []).forEach(cookie => {
+          if (cookie.type === INTERNAL_SYNC_TYPE.IMAGE) {
             if (pixelEnabled && !lookup[cookie.src]) {
               syncs.push({
                 type: EXTERNAL_SYNC_TYPE.IMAGE,
                 url: cookie.src
               });
             }
-            break;
-        }
+          }
+        });
       });
     });
     return syncs;
diff --git a/test/spec/modules/vidazooBidAdapter_spec.js b/test/spec/modules/vidazooBidAdapter_spec.js
index 755295c7bd6..a52669b773b 100644
--- a/test/spec/modules/vidazooBidAdapter_spec.js
+++ b/test/spec/modules/vidazooBidAdapter_spec.js
@@ -22,7 +22,8 @@ const BID = {
 
 const BIDDER_REQUEST = {
   'gdprConsent': {
-    'consentString': 'consent_string'
+    'consentString': 'consent_string',
+    'gdprApplies': true
   },
   'refererInfo': {
     'referer': 'https://www.greatsite.com'
@@ -31,16 +32,20 @@ const BIDDER_REQUEST = {
 
 const SERVER_RESPONSE = {
   body: {
-    'ad': '<iframe>console.log("hello world")</iframe>',
-    'price': 0.8,
-    'creativeId': '12610997325162499419',
-    'exp': 30,
-    'cookies': [{
-      'src': 'https://sync.com',
-      'type': 'iframe'
-    }, {
-      'src': 'https://sync.com',
-      'type': 'img'
+    results: [{
+      'ad': '<iframe>console.log("hello world")</iframe>',
+      'price': 0.8,
+      'creativeId': '12610997325162499419',
+      'exp': 30,
+      'width': 300,
+      'height': 250,
+      'cookies': [{
+        'src': 'https://sync.com',
+        'type': 'iframe'
+      }, {
+        'src': 'https://sync.com',
+        'type': 'img'
+      }]
     }]
   }
 };
@@ -119,30 +124,14 @@ describe('VidazooBidAdapter', function () {
 
     it('should build request for each size', function () {
       const requests = adapter.buildRequests([BID], BIDDER_REQUEST);
-      expect(requests).to.have.length(2);
+      expect(requests).to.have.length(1);
       expect(requests[0]).to.deep.equal({
-        method: 'GET',
-        url: `${URL}/prebid/59db6b3b4ffaa70004f45cdc`,
+        method: 'POST',
+        url: `${URL}/prebid/multi/59db6b3b4ffaa70004f45cdc`,
         data: {
-          consent: 'consent_string',
-          width: '300',
-          height: '250',
-          url: 'https%3A%2F%2Fwww.greatsite.com',
-          cb: 1000,
-          bidFloor: 0.1,
-          bidId: '2d52001cabd527',
-          publisherId: '59ac17c192832d0011283fe3',
-          'ext.param1': 'loremipsum',
-          'ext.param2': 'dolorsitamet',
-        }
-      });
-      expect(requests[1]).to.deep.equal({
-        method: 'GET',
-        url: `${URL}/prebid/59db6b3b4ffaa70004f45cdc`,
-        data: {
-          consent: 'consent_string',
-          width: '300',
-          height: '600',
+          gdprConsent: 'consent_string',
+          gdpr: 1,
+          sizes: ['300x250', '300x600'],
           url: 'https%3A%2F%2Fwww.greatsite.com',
           cb: 1000,
           bidFloor: 0.1,
@@ -158,6 +147,25 @@ describe('VidazooBidAdapter', function () {
       sandbox.restore();
     });
   });
+  describe('getUserSyncs', function () {
+    it('should have valid user sync with iframeEnabled', function () {
+      const result = adapter.getUserSyncs({iframeEnabled: true}, [SERVER_RESPONSE]);
+
+      expect(result).to.deep.equal([{
+        type: 'iframe',
+        url: 'https://static.cootlogix.com/basev/sync/user_sync.html'
+      }]);
+    });
+
+    it('should have valid user sync with pixelEnabled', function () {
+      const result = adapter.getUserSyncs({pixelEnabled: true}, [SERVER_RESPONSE]);
+
+      expect(result).to.deep.equal([{
+        'url': 'https://sync.com',
+        'type': 'image'
+      }]);
+    })
+  });
 
   describe('interpret response', function () {
     it('should return empty array when there is no response', function () {
@@ -193,7 +201,7 @@ describe('VidazooBidAdapter', function () {
 
     it('should take default TTL', function () {
       const serverResponse = utils.deepClone(SERVER_RESPONSE);
-      delete serverResponse.body.exp;
+      delete serverResponse.body.results[0].exp;
       const responses = adapter.interpretResponse(serverResponse, REQUEST);
       expect(responses).to.have.length(1);
       expect(responses[0].ttl).to.equal(300);