diff --git a/modules/rasBidAdapter.js b/modules/rasBidAdapter.js
index a7aceb107b9..0fed99447f6 100644
--- a/modules/rasBidAdapter.js
+++ b/modules/rasBidAdapter.js
@@ -129,6 +129,36 @@ const getGdprParams = (bidderRequest) => {
   return queryString;
 };
 
+const parseAuctionConfigs = (serverResponse, bidRequest) => {
+  if (isEmpty(bidRequest)) {
+    return null;
+  }
+  const auctionConfigs = [];
+  const gctx = serverResponse && serverResponse.body?.gctx;
+
+  bidRequest.bidIds.filter(bid => bid.fledgeEnabled).forEach((bid) => {
+    auctionConfigs.push({
+      'bidId': bid.bidId,
+      'config': {
+        'seller': 'https://csr.onet.pl',
+        'decisionLogicUrl': `https://csr.onet.pl/${encodeURIComponent(bid.params.network)}/v1/protected-audience-api/decision-logic.js`,
+        'interestGroupBuyers': ['https://csr.onet.pl'],
+        'auctionSignals': {
+          'params': bid.params,
+          'sizes': bid.sizes,
+          'gctx': gctx
+        }
+      }
+    });
+  });
+
+  if (auctionConfigs.length === 0) {
+    return null;
+  } else {
+    return auctionConfigs;
+  }
+}
+
 export const spec = {
   code: BIDDER_CODE,
   supportedMediaTypes: [BANNER],
@@ -145,8 +175,16 @@ export const spec = {
     const slotsQuery = getSlots(bidRequests);
     const contextQuery = getContextParams(bidRequests, bidderRequest);
     const gdprQuery = getGdprParams(bidderRequest);
-    const bidIds = bidRequests.map((bid) => ({ slot: bid.params.slot, bidId: bid.bidId }));
+    const fledgeEligible = Boolean(bidderRequest && bidderRequest.fledgeEnabled);
     const network = bidRequests[0].params.network;
+    const bidIds = bidRequests.map((bid) => ({
+      slot: bid.params.slot,
+      bidId: bid.bidId,
+      sizes: getAdUnitSizes(bid),
+      params: bid.params,
+      fledgeEnabled: fledgeEligible
+    }));
+
     return [{
       method: 'GET',
       url: getEndpoint(network) + contextQuery + slotsQuery + gdprQuery,
@@ -156,10 +194,16 @@ export const spec = {
 
   interpretResponse: function (serverResponse, bidRequest) {
     const response = serverResponse.body;
-    if (!response || !response.ads || response.ads.length === 0) {
-      return [];
+
+    const fledgeAuctionConfigs = parseAuctionConfigs(serverResponse, bidRequest);
+    const bids = (!response || !response.ads || response.ads.length === 0) ? [] : response.ads.map(buildBid).filter((bid) => !isEmpty(bid));
+
+    if (fledgeAuctionConfigs) {
+      // Return a tuple of bids and auctionConfigs. It is possible that bids could be null.
+      return {bids, fledgeAuctionConfigs};
+    } else {
+      return bids;
     }
-    return response.ads.map(buildBid).filter((bid) => !isEmpty(bid));
   }
 };
 
diff --git a/test/spec/modules/rasBidAdapter_spec.js b/test/spec/modules/rasBidAdapter_spec.js
index bfa72a2510e..719e15ad695 100644
--- a/test/spec/modules/rasBidAdapter_spec.js
+++ b/test/spec/modules/rasBidAdapter_spec.js
@@ -1,6 +1,7 @@
 import { expect } from 'chai';
 import { spec } from 'modules/rasBidAdapter.js';
 import { newBidder } from 'src/adapters/bidderFactory.js';
+import {getAdUnitSizes} from '../../../src/utils';
 
 const CSR_ENDPOINT = 'https://csr.onet.pl/4178463/csr-006/csr.json?nid=4178463&';
 
@@ -192,5 +193,56 @@ describe('rasBidAdapter', function () {
       const resp = spec.interpretResponse({ body: res }, {});
       expect(resp).to.deep.equal([]);
     });
+
+    it('should generate auctionConfig when fledge is enabled', function () {
+      let bidRequest = {
+        method: 'GET',
+        url: 'https://example.com',
+        bidIds: [{
+          slot: 'top',
+          bidId: '123',
+          network: 'testnetwork',
+          sizes: ['300x250'],
+          params: {
+            site: 'testsite',
+            area: 'testarea',
+            network: 'testnetwork'
+          },
+          fledgeEnabled: true
+        },
+        {
+          slot: 'top',
+          bidId: '456',
+          network: 'testnetwork',
+          sizes: ['300x250'],
+          params: {
+            site: 'testsite',
+            area: 'testarea',
+            network: 'testnetwork'
+          },
+          fledgeEnabled: false
+        }]
+      };
+
+      let auctionConfigs = [{
+        'bidId': '123',
+        'config': {
+          'seller': 'https://csr.onet.pl',
+          'decisionLogicUrl': 'https://csr.onet.pl/testnetwork/v1/protected-audience-api/decision-logic.js',
+          'interestGroupBuyers': ['https://csr.onet.pl'],
+          'auctionSignals': {
+            'params': {
+              site: 'testsite',
+              area: 'testarea',
+              network: 'testnetwork'
+            },
+            'sizes': ['300x250'],
+            'gctx': '1234567890'
+          }
+        }
+      }];
+      const resp = spec.interpretResponse({body: {gctx: '1234567890'}}, bidRequest);
+      expect(resp).to.deep.equal({bids: [], fledgeAuctionConfigs: auctionConfigs});
+    });
   });
 });