diff --git a/src/main/java/org/prebid/server/bidder/ix/IxBidder.java b/src/main/java/org/prebid/server/bidder/ix/IxBidder.java
index 5c7c468af8f..5fb26e698fd 100644
--- a/src/main/java/org/prebid/server/bidder/ix/IxBidder.java
+++ b/src/main/java/org/prebid/server/bidder/ix/IxBidder.java
@@ -409,11 +409,14 @@ private static ExtBidPrebidVideo videoInfo(ExtBidPrebidVideo extBidPrebidVideo)
     private List<FledgeAuctionConfig> extractFledge(IxBidResponse bidResponse) {
         return Optional.ofNullable(bidResponse)
                 .map(IxBidResponse::getExt)
-                .map(IxExtBidResponse::getFledgeAuctionConfigs)
-                .orElse(Collections.emptyMap())
-                .entrySet()
+                .map(IxExtBidResponse::getProtectedAudienceAuctionConfigs)
+                .orElse(Collections.emptyList())
                 .stream()
-                .map(e -> FledgeAuctionConfig.builder().impId(e.getKey()).config(e.getValue()).build())
+                .filter(Objects::nonNull)
+                .map(ixAuctionConfig -> FledgeAuctionConfig.builder()
+                        .impId(ixAuctionConfig.getBidId())
+                        .config(ixAuctionConfig.getConfig())
+                        .build())
                 .toList();
     }
 }
diff --git a/src/main/java/org/prebid/server/bidder/ix/model/response/AuctionConfigExtBidResponse.java b/src/main/java/org/prebid/server/bidder/ix/model/response/AuctionConfigExtBidResponse.java
new file mode 100644
index 00000000000..709fab87429
--- /dev/null
+++ b/src/main/java/org/prebid/server/bidder/ix/model/response/AuctionConfigExtBidResponse.java
@@ -0,0 +1,14 @@
+package org.prebid.server.bidder.ix.model.response;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import lombok.Value;
+
+@Value(staticConstructor = "of")
+public class AuctionConfigExtBidResponse {
+
+    @JsonProperty("bidId")
+    String bidId;
+
+    ObjectNode config;
+}
diff --git a/src/main/java/org/prebid/server/bidder/ix/model/response/IxExtBidResponse.java b/src/main/java/org/prebid/server/bidder/ix/model/response/IxExtBidResponse.java
index c292317d22c..c586817df2c 100644
--- a/src/main/java/org/prebid/server/bidder/ix/model/response/IxExtBidResponse.java
+++ b/src/main/java/org/prebid/server/bidder/ix/model/response/IxExtBidResponse.java
@@ -1,15 +1,14 @@
 package org.prebid.server.bidder.ix.model.response;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
-import com.fasterxml.jackson.databind.node.ObjectNode;
 import lombok.Value;
 
-import java.util.Map;
+import java.util.List;
 
 @Value(staticConstructor = "of")
 public class IxExtBidResponse {
 
-    @JsonProperty("fledge_auction_configs")
-    Map<String, ObjectNode> fledgeAuctionConfigs;
+    @JsonProperty("protectedAudienceAuctionConfigs")
+    List<AuctionConfigExtBidResponse> protectedAudienceAuctionConfigs;
 
 }
diff --git a/src/test/java/org/prebid/server/bidder/ix/IxBidderTest.java b/src/test/java/org/prebid/server/bidder/ix/IxBidderTest.java
index 18f020f2bc0..35726f5a205 100644
--- a/src/test/java/org/prebid/server/bidder/ix/IxBidderTest.java
+++ b/src/test/java/org/prebid/server/bidder/ix/IxBidderTest.java
@@ -27,6 +27,7 @@
 import org.mockito.junit.jupiter.MockitoExtension;
 import org.prebid.server.VertxTest;
 import org.prebid.server.bidder.ix.model.request.IxDiag;
+import org.prebid.server.bidder.ix.model.response.AuctionConfigExtBidResponse;
 import org.prebid.server.bidder.ix.model.response.IxBidResponse;
 import org.prebid.server.bidder.ix.model.response.IxExtBidResponse;
 import org.prebid.server.bidder.ix.model.response.NativeV11Wrapper;
@@ -49,7 +50,6 @@
 import org.prebid.server.version.PrebidVersionProvider;
 
 import java.util.List;
-import java.util.Map;
 import java.util.function.Function;
 import java.util.function.UnaryOperator;
 
@@ -778,7 +778,7 @@ public void makeBidderResponseShouldReturnFledgeAuctionConfig() throws JsonProce
         final IxBidResponse bidResponseWithFledge = IxBidResponse.builder()
                 .cur(bidResponse.getCur())
                 .seatbid(bidResponse.getSeatbid())
-                .ext(IxExtBidResponse.of(Map.of(impId, fledgeAuctionConfig)))
+                .ext(IxExtBidResponse.of(List.of(AuctionConfigExtBidResponse.of(impId, fledgeAuctionConfig))))
                 .build();
         final BidderCall<BidRequest> httpCall =
                 givenHttpCall(bidRequest, mapper.writeValueAsString(bidResponseWithFledge));
diff --git a/src/test/resources/org/prebid/server/it/openrtb2/ix/test-auction-ix-request.json b/src/test/resources/org/prebid/server/it/openrtb2/ix/test-auction-ix-request.json
index 0c46e680fbc..1fc85c3cd79 100644
--- a/src/test/resources/org/prebid/server/it/openrtb2/ix/test-auction-ix-request.json
+++ b/src/test/resources/org/prebid/server/it/openrtb2/ix/test-auction-ix-request.json
@@ -8,6 +8,7 @@
         "h": 250
       },
       "ext": {
+        "ae": 1,
         "ix": {
           "siteId": "10002"
         }
diff --git a/src/test/resources/org/prebid/server/it/openrtb2/ix/test-auction-ix-response.json b/src/test/resources/org/prebid/server/it/openrtb2/ix/test-auction-ix-response.json
index 8685c8ede1a..5be6fc4788c 100644
--- a/src/test/resources/org/prebid/server/it/openrtb2/ix/test-auction-ix-response.json
+++ b/src/test/resources/org/prebid/server/it/openrtb2/ix/test-auction-ix-response.json
@@ -27,7 +27,47 @@
       "ix": "{{ ix.response_time_ms }}"
     },
     "prebid": {
-      "auctiontimestamp": 0
+      "auctiontimestamp": 0,
+      "fledge": {
+        "auctionconfigs": [
+          {
+            "impid": "imp_id",
+            "bidder": "ix",
+            "adapter": "ix",
+            "config": {
+              "seller": "https://test.casalemedia.com",
+              "decisionLogicUrl": "https://test.casalemedia.com/decision-logic.js",
+              "trustedScoringSignalsURL": "https://test.casalemedia.com/123",
+              "interestGroupBuyers": [
+                "https://test.com"
+              ],
+              "sellerSignals": {
+                "callbackURL": "https://test.casalemedia.com/callback/1",
+                "debugURL": "https://test.casalemedia.com/debug/1",
+                "width": 300,
+                "height": 250
+              },
+              "sellerTimeout": 150,
+              "perBuyerSignals": {
+                "https://test.com": [
+                  {
+                    "key": "value"
+                  }
+                ]
+              },
+              "perBuyerCurrencies": {
+                "*": "USD"
+              },
+              "sellerCurrency": "USD",
+              "requestedSize": {
+                "width": 300,
+                "height": 250
+              },
+              "maxTrustedBiddingSignalsURLLength": 1000
+            }
+          }
+        ]
+      }
     },
     "tmaxrequest": 5000
   }
diff --git a/src/test/resources/org/prebid/server/it/openrtb2/ix/test-ix-bid-request.json b/src/test/resources/org/prebid/server/it/openrtb2/ix/test-ix-bid-request.json
index 0658f90c813..ef303b14b8e 100644
--- a/src/test/resources/org/prebid/server/it/openrtb2/ix/test-ix-bid-request.json
+++ b/src/test/resources/org/prebid/server/it/openrtb2/ix/test-ix-bid-request.json
@@ -15,6 +15,7 @@
         "h": 250
       },
       "ext": {
+        "ae": 1,
         "tid": "${json-unit.any-string}",
         "bidder": {
           "siteId": "10002"
diff --git a/src/test/resources/org/prebid/server/it/openrtb2/ix/test-ix-bid-response.json b/src/test/resources/org/prebid/server/it/openrtb2/ix/test-ix-bid-response.json
index 9d9d7035ed7..c62e7c626b9 100644
--- a/src/test/resources/org/prebid/server/it/openrtb2/ix/test-ix-bid-response.json
+++ b/src/test/resources/org/prebid/server/it/openrtb2/ix/test-ix-bid-response.json
@@ -13,5 +13,43 @@
       ],
       "seat": "seatId6"
     }
-  ]
+  ],
+  "ext": {
+    "protectedAudienceAuctionConfigs": [
+      {
+        "bidId": "imp_id",
+        "config": {
+          "seller": "https://test.casalemedia.com",
+          "decisionLogicUrl": "https://test.casalemedia.com/decision-logic.js",
+          "trustedScoringSignalsURL": "https://test.casalemedia.com/123",
+          "interestGroupBuyers": [
+            "https://test.com"
+          ],
+          "sellerSignals": {
+            "callbackURL": "https://test.casalemedia.com/callback/1",
+            "debugURL": "https://test.casalemedia.com/debug/1",
+            "width": 300,
+            "height": 250
+          },
+          "sellerTimeout": 150,
+          "perBuyerSignals": {
+            "https://test.com": [
+              {
+                "key": "value"
+              }
+            ]
+          },
+          "perBuyerCurrencies": {
+            "*": "USD"
+          },
+          "sellerCurrency": "USD",
+          "requestedSize": {
+            "width": 300,
+            "height": 250
+          },
+          "maxTrustedBiddingSignalsURLLength": 1000
+        }
+      }
+    ]
+  }
 }