diff --git a/modules/outbrainBidAdapter.js b/modules/outbrainBidAdapter.js
index 0637d680912..b4f74872082 100644
--- a/modules/outbrainBidAdapter.js
+++ b/modules/outbrainBidAdapter.js
@@ -3,6 +3,7 @@
 
 import {registerBidder} from '../src/adapters/bidderFactory.js';
 import {BANNER, NATIVE, VIDEO} from '../src/mediaTypes.js';
+import { getStorageManager } from '../src/storageManager.js';
 import {OUTSTREAM} from '../src/video.js';
 import {_map, deepAccess, deepSetValue, isArray, logWarn, replaceAuctionPrice} from '../src/utils.js';
 import {ajax} from '../src/ajax.js';
@@ -23,6 +24,9 @@ const NATIVE_PARAMS = {
   cta: { id: 1, type: 12, name: 'data' }
 };
 const OUTSTREAM_RENDERER_URL = 'https://acdn.adnxs.com/video/outstream/ANOutstreamVideo.js';
+const OB_USER_TOKEN_KEY = 'OB-USER-TOKEN';
+
+export const storage = getStorageManager({bidderCode: BIDDER_CODE});
 
 export const spec = {
   code: BIDDER_CODE,
@@ -130,6 +134,11 @@ export const spec = {
       request.test = 1;
     }
 
+    const obUserToken = storage.getDataFromLocalStorage(OB_USER_TOKEN_KEY)
+    if (obUserToken) {
+      deepSetValue(request, 'user.ext.obusertoken', obUserToken)
+    }
+
     if (deepAccess(bidderRequest, 'gdprConsent.gdprApplies')) {
       deepSetValue(request, 'user.ext.consent', bidderRequest.gdprConsent.consentString)
       deepSetValue(request, 'regs.ext.gdpr', bidderRequest.gdprConsent.gdprApplies & 1)
diff --git a/test/spec/modules/outbrainBidAdapter_spec.js b/test/spec/modules/outbrainBidAdapter_spec.js
index d8690aeb6a5..ba394a68675 100644
--- a/test/spec/modules/outbrainBidAdapter_spec.js
+++ b/test/spec/modules/outbrainBidAdapter_spec.js
@@ -1,5 +1,5 @@
 import { expect } from 'chai';
-import { spec } from 'modules/outbrainBidAdapter.js';
+import { spec, storage } from 'modules/outbrainBidAdapter.js';
 import { config } from 'src/config.js';
 import { server } from 'test/mocks/xhr';
 
@@ -213,15 +213,18 @@ describe('Outbrain Adapter', function () {
     })
 
     describe('buildRequests', function () {
+      let getDataFromLocalStorageStub;
+
       before(() => {
+        getDataFromLocalStorageStub = sinon.stub(storage, 'getDataFromLocalStorage')
         config.setConfig({
           outbrain: {
             bidderUrl: 'https://bidder-url.com',
           }
-        }
-        )
+        })
       })
       after(() => {
+        getDataFromLocalStorageStub.restore()
         config.resetConfig()
       })
 
@@ -522,6 +525,22 @@ describe('Outbrain Adapter', function () {
         ]);
       });
 
+      it('should pass OB user token', function () {
+        getDataFromLocalStorageStub.returns('12345');
+
+        let bidRequest = {
+          bidId: 'bidId',
+          params: {},
+          ...commonBidRequest,
+        };
+
+        let res = spec.buildRequests([bidRequest], commonBidderRequest);
+        const resData = JSON.parse(res.data)
+        expect(resData.user.ext.obusertoken).to.equal('12345')
+        expect(getDataFromLocalStorageStub.called).to.be.true;
+        sinon.assert.calledWith(getDataFromLocalStorageStub, 'OB-USER-TOKEN');
+      });
+
       it('should pass bidfloor', function () {
         const bidRequest = {
           ...commonBidRequest,