diff --git a/http/beaconstate.go b/http/beaconstate.go
index ab3e6e34..7c46978e 100644
--- a/http/beaconstate.go
+++ b/http/beaconstate.go
@@ -137,7 +137,12 @@ func (s *Service) beaconStateFromSSZ(ctx context.Context, res *httpResponse) (*a
 		}
 	case spec.DataVersionElectra:
 		response.Data.Electra = &electra.BeaconState{}
-		if err := response.Data.Electra.UnmarshalSSZ(res.body); err != nil {
+		if s.customSpecSupport {
+			err = dynSSZ.UnmarshalSSZ(response.Data.Electra, res.body)
+		} else {
+			err = response.Data.Electra.UnmarshalSSZ(res.body)
+		}
+		if err != nil {
 			return nil, errors.Join(errors.New("failed to decode electra beacon state"), err)
 		}
 	default:
diff --git a/http/proposal.go b/http/proposal.go
index 80f08d56..ccab2683 100644
--- a/http/proposal.go
+++ b/http/proposal.go
@@ -221,10 +221,18 @@ func (s *Service) beaconBlockProposalFromSSZ(ctx context.Context,
 	case spec.DataVersionElectra:
 		if response.Data.Blinded {
 			response.Data.ElectraBlinded = &apiv1electra.BlindedBeaconBlock{}
-			err = response.Data.ElectraBlinded.UnmarshalSSZ(res.body)
+			if s.customSpecSupport {
+				err = dynSSZ.UnmarshalSSZ(response.Data.ElectraBlinded, res.body)
+			} else {
+				err = response.Data.ElectraBlinded.UnmarshalSSZ(res.body)
+			}
 		} else {
 			response.Data.Electra = &apiv1electra.BlockContents{}
-			err = response.Data.Electra.UnmarshalSSZ(res.body)
+			if s.customSpecSupport {
+				err = dynSSZ.UnmarshalSSZ(response.Data.Electra, res.body)
+			} else {
+				err = response.Data.Electra.UnmarshalSSZ(res.body)
+			}
 		}
 	default:
 		return nil, fmt.Errorf("unhandled block proposal version %s", res.consensusVersion)
diff --git a/http/signedbeaconblock.go b/http/signedbeaconblock.go
index e231004d..45b9d06f 100644
--- a/http/signedbeaconblock.go
+++ b/http/signedbeaconblock.go
@@ -145,8 +145,13 @@ func (s *Service) signedBeaconBlockFromSSZ(ctx context.Context,
 		}
 	case spec.DataVersionElectra:
 		response.Data.Electra = &electra.SignedBeaconBlock{}
-		if err := response.Data.Electra.UnmarshalSSZ(res.body); err != nil {
-			return nil, errors.Join(errors.New("failed to decode electra signed block contents"), err)
+		if s.customSpecSupport {
+			err = dynSSZ.UnmarshalSSZ(response.Data.Electra, res.body)
+		} else {
+			err = response.Data.Electra.UnmarshalSSZ(res.body)
+		}
+		if err != nil {
+			return nil, errors.Join(errors.New("failed to decode deneb signed block contents"), err)
 		}
 	default:
 		return nil, fmt.Errorf("unhandled block version %s", res.consensusVersion)
diff --git a/spec/versionedbeaconblock.go b/spec/versionedbeaconblock.go
index f878ec9b..a390121c 100644
--- a/spec/versionedbeaconblock.go
+++ b/spec/versionedbeaconblock.go
@@ -675,6 +675,30 @@ func (v *VersionedBeaconBlock) ProposerSlashings() ([]*phase0.ProposerSlashing,
 	}
 }
 
+// Consolidations returns the consolidations of the beacon block.
+func (v *VersionedBeaconBlock) Consolidations() ([]*electra.SignedConsolidation, error) {
+	switch v.Version {
+	case DataVersionPhase0:
+		return nil, errors.New("consolidations not available in phase0 block")
+	case DataVersionAltair:
+		return nil, errors.New("consolidations not available in altair block")
+	case DataVersionBellatrix:
+		return nil, errors.New("consolidations not available in bellatrix block")
+	case DataVersionCapella:
+		return nil, errors.New("consolidations not available in capella block")
+	case DataVersionDeneb:
+		return nil, errors.New("consolidations not available in deneb block")
+	case DataVersionElectra:
+		if v.Electra == nil || v.Electra.Body == nil {
+			return nil, errors.New("no electra block")
+		}
+
+		return v.Electra.Body.Consolidations, nil
+	default:
+		return nil, errors.New("unknown version")
+	}
+}
+
 // String returns a string version of the structure.
 func (v *VersionedBeaconBlock) String() string {
 	switch v.Version {