diff --git a/modules/seedtagBidAdapter.js b/modules/seedtagBidAdapter.js
index f93ed814a0a..10b1a872fed 100644
--- a/modules/seedtagBidAdapter.js
+++ b/modules/seedtagBidAdapter.js
@@ -88,8 +88,7 @@ function hasBannerMediaType(bid) {
 function hasMandatoryDisplayParams(bid) {
   const p = bid.params;
   return (
-    !!p.publisherId &&
-    !!p.adUnitId
+    !!p.publisherId
   );
 }
 
@@ -98,7 +97,6 @@ function hasMandatoryVideoParams(bid) {
 
   const isValid =
     !!bid.params.publisherId &&
-    !!bid.params.adUnitId &&
     hasVideoMediaType(bid) &&
     !!videoParams.playerSize &&
     isArray(videoParams.playerSize) &&
@@ -249,13 +247,14 @@ export function getTimeoutUrl(data) {
     const params = data[0].params[0];
     const timeout = data[0].timeout;
 
-    queryParams =
-      '?publisherToken=' +
-      params.publisherId +
-      '&adUnitId=' +
-      params.adUnitId +
-      '&timeout=' +
-      timeout;
+    const qsParams = [
+      'publisherToken=' + params.publisherId,
+      'timeout=' + timeout
+    ];
+    if (params.adUnitId) {
+      qsParams.push('adUnitId=' + params.adUnitId);
+    }
+    queryParams = '?' + qsParams.join('&');
   }
   return SEEDTAG_SSP_ONTIMEOUT_ENDPOINT + queryParams;
 }
@@ -295,9 +294,12 @@ export const spec = {
    * @return ServerRequest Info describing the request to the server.
    */
   buildRequests(validBidRequests, bidderRequest) {
+    const publisherId = validBidRequests[0].params.publisherId;
+    const integrationType = validBidRequests[0].params.integrationType || 'publisherToken';
+
     const payload = {
       url: bidderRequest.refererInfo.page,
-      publisherToken: validBidRequests[0].params.publisherId,
+      publisherToken: publisherId,
       cmp: !!bidderRequest.gdprConsent,
       timeout: bidderRequest.timeout,
       version: '$prebid.version$',
@@ -306,7 +308,8 @@ export const spec = {
       ttfb: ttfb(),
       bidRequests: _map(validBidRequests, buildBidRequest),
       user: { topics: [], eids: [] },
-      site: {}
+      site: {},
+      integrationType: integrationType
     };
 
     if (payload.cmp) {
@@ -371,6 +374,10 @@ export const spec = {
       payload.site.pagecat = bidderRequest.ortb2.site.pagecat
     }
 
+    if (bidderRequest.ortb2) {
+      payload.ortb = bidderRequest.ortb2;
+    }
+
     const payloadString = JSON.stringify(payload);
 
     return {
diff --git a/test/spec/modules/seedtagBidAdapter_spec.js b/test/spec/modules/seedtagBidAdapter_spec.js
index 3a448c90d78..65fc9d1a532 100644
--- a/test/spec/modules/seedtagBidAdapter_spec.js
+++ b/test/spec/modules/seedtagBidAdapter_spec.js
@@ -171,13 +171,13 @@ describe('Seedtag Adapter', function () {
           );
           expect(isBidRequestValid).to.equal(false);
         });
-        it('does not have the AdUnitId.', function () {
+        it('should be valid with only publisherId and no adUnitId', function () {
           const isBidRequestValid = spec.isBidRequestValid(
             createSlotConfig({
               publisherId: PUBLISHER_ID,
             })
           );
-          expect(isBidRequestValid).to.equal(false);
+          expect(isBidRequestValid).to.equal(true);
         });
       });
 
@@ -711,6 +711,47 @@ describe('Seedtag Adapter', function () {
         expect(data.sua).to.be.undefined;
       });
     });
+
+    describe('integrationType param', function () {
+      it('should default to publisherToken when integrationType is not provided', function () {
+        const request = spec.buildRequests(validBidRequests, bidderRequest);
+        const data = JSON.parse(request.data);
+        expect(data.integrationType).to.equal('publisherToken');
+      });
+
+      it('should use the provided integrationType value', function () {
+        const bidRequests = JSON.parse(JSON.stringify(validBidRequests));
+        bidRequests[0].params.integrationType = 'ronId';
+
+        const request = spec.buildRequests(bidRequests, bidderRequest);
+        const data = JSON.parse(request.data);
+        expect(data.integrationType).to.equal('ronId');
+      });
+    });
+
+    describe('ortb param', function () {
+      it('should add ortb param to payload when bidderRequest has ortb2', function () {
+        const ortb2 = {
+          site: { cat: ['IAB1'] },
+          user: { data: [{ name: 'test' }] },
+          bcat: ['IAB3'],
+        };
+        bidderRequest['ortb2'] = ortb2;
+
+        const request = spec.buildRequests(validBidRequests, bidderRequest);
+        const data = JSON.parse(request.data);
+        expect(data.ortb).to.exist;
+        expect(data.ortb).to.deep.equal(ortb2);
+      });
+
+      it('should not add ortb param to payload when bidderRequest does not have ortb2', function () {
+        bidderRequest['ortb2'] = undefined;
+
+        const request = spec.buildRequests(validBidRequests, bidderRequest);
+        const data = JSON.parse(request.data);
+        expect(data.ortb).to.be.undefined;
+      });
+    });
   })
   describe('interpret response method', function () {
     it('should return a void array, when the server response are not correct.', function () {
@@ -895,7 +936,7 @@ describe('Seedtag Adapter', function () {
       utils.triggerPixel.restore();
     });
 
-    it('should return the correct endpoint', function () {
+    it('should return the correct endpoint with adUnitId', function () {
       const params = { publisherId: '0000', adUnitId: '11111' };
       const timeout = 3000;
       const timeoutData = [{ params: [params], timeout }];
@@ -903,8 +944,21 @@ describe('Seedtag Adapter', function () {
       expect(timeoutUrl).to.equal(
         'https://s.seedtag.com/se/hb/timeout?publisherToken=' +
         params.publisherId +
+        '&timeout=' +
+        timeout +
         '&adUnitId=' +
-        params.adUnitId +
+        params.adUnitId
+      );
+    });
+
+    it('should return the correct endpoint without adUnitId', function () {
+      const params = { publisherId: '0000' };
+      const timeout = 3000;
+      const timeoutData = [{ params: [params], timeout }];
+      const timeoutUrl = getTimeoutUrl(timeoutData);
+      expect(timeoutUrl).to.equal(
+        'https://s.seedtag.com/se/hb/timeout?publisherToken=' +
+        params.publisherId +
         '&timeout=' +
         timeout
       );
@@ -919,10 +973,10 @@ describe('Seedtag Adapter', function () {
         utils.triggerPixel.calledWith(
           'https://s.seedtag.com/se/hb/timeout?publisherToken=' +
           params.publisherId +
-          '&adUnitId=' +
-          params.adUnitId +
           '&timeout=' +
-          timeout
+          timeout +
+          '&adUnitId=' +
+          params.adUnitId
         )
       ).to.equal(true);
     });