diff --git a/api/handler/attributes.go b/api/handler/attributes.go
index 89cf8f4..6cdbc29 100644
--- a/api/handler/attributes.go
+++ b/api/handler/attributes.go
@@ -187,7 +187,7 @@ func encodeToObjectAttributesResponse(info *data.ObjectInfo, p *GetObjectAttribu
 		case eTag:
 			resp.ETag = info.HashSum
 		case storageClass:
-			resp.StorageClass = "STANDARD"
+			resp.StorageClass = api.DefaultStorageClass
 		case objectSize:
 			resp.ObjectSize = info.Size
 		case checksum:
diff --git a/api/handler/get.go b/api/handler/get.go
index c17a4a0..7e27347 100644
--- a/api/handler/get.go
+++ b/api/handler/get.go
@@ -98,6 +98,7 @@ func writeHeaders(h http.Header, requestHeader http.Header, extendedInfo *data.E
 	h.Set(api.ETag, info.ETag(md5Enabled))
 
 	h.Set(api.AmzTaggingCount, strconv.Itoa(tagSetLength))
+	h.Set(api.AmzStorageClass, api.DefaultStorageClass)
 
 	if !isBucketUnversioned {
 		h.Set(api.AmzVersionID, extendedInfo.Version())
diff --git a/api/handler/multipart_upload.go b/api/handler/multipart_upload.go
index ecf51f4..16ef167 100644
--- a/api/handler/multipart_upload.go
+++ b/api/handler/multipart_upload.go
@@ -61,7 +61,7 @@ type (
 		Owner                Owner         `xml:"Owner"`
 		Parts                []*layer.Part `xml:"Part"`
 		PartNumberMarker     int           `xml:"PartNumberMarker,omitempty"`
-		StorageClass         string        `xml:"StorageClass,omitempty"`
+		StorageClass         string        `xml:"StorageClass"`
 		UploadID             string        `xml:"UploadId"`
 	}
 
@@ -70,7 +70,7 @@ type (
 		Initiator    Initiator `xml:"Initiator"`
 		Key          string    `xml:"Key"`
 		Owner        Owner     `xml:"Owner"`
-		StorageClass string    `xml:"StorageClass,omitempty"`
+		StorageClass string    `xml:"StorageClass"`
 		UploadID     string    `xml:"UploadId"`
 	}
 
@@ -697,7 +697,8 @@ func encodeListMultipartUploadsToResponse(info *layer.ListMultipartUploadsInfo,
 				ID:          u.Owner.String(),
 				DisplayName: u.Owner.String(),
 			},
-			UploadID: u.UploadID,
+			UploadID:     u.UploadID,
+			StorageClass: api.DefaultStorageClass,
 		}
 		uploads = append(uploads, m)
 	}
@@ -726,6 +727,7 @@ func encodeListPartsToResponse(info *layer.ListPartsInfo, params *layer.ListPart
 		PartNumberMarker: params.PartNumberMarker,
 		UploadID:         params.Info.UploadID,
 		Parts:            info.Parts,
+		StorageClass:     api.DefaultStorageClass,
 	}
 }
 
diff --git a/api/handler/object_list.go b/api/handler/object_list.go
index 9c1ff17..5144b5c 100644
--- a/api/handler/object_list.go
+++ b/api/handler/object_list.go
@@ -6,6 +6,7 @@ import (
 	"strconv"
 	"time"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
@@ -196,6 +197,7 @@ func fillContents(src []*data.ObjectInfo, encode string, fetchOwner bool) []Obje
 			Size:         obj.Size,
 			LastModified: obj.Created.UTC().Format(time.RFC3339),
 			ETag:         obj.HashSum,
+			StorageClass: api.DefaultStorageClass,
 		}
 
 		if size, err := layer.GetObjectSize(obj); err == nil {
@@ -284,9 +286,10 @@ func encodeListObjectVersionsToResponse(info *layer.ListObjectVersionsInfo, buck
 				ID:          ver.ObjectInfo.Owner.String(),
 				DisplayName: ver.ObjectInfo.Owner.String(),
 			},
-			Size:      ver.ObjectInfo.Size,
-			VersionID: ver.Version(),
-			ETag:      ver.ObjectInfo.ETag(md5Enabled),
+			Size:         ver.ObjectInfo.Size,
+			VersionID:    ver.Version(),
+			ETag:         ver.ObjectInfo.ETag(md5Enabled),
+			StorageClass: api.DefaultStorageClass,
 		})
 	}
 	// this loop is not starting till versioning is not implemented
diff --git a/api/handler/response.go b/api/handler/response.go
index 9d07b33..c4edc84 100644
--- a/api/handler/response.go
+++ b/api/handler/response.go
@@ -110,7 +110,7 @@ type Object struct {
 	Owner *Owner `xml:"Owner,omitempty"`
 
 	// Class of storage used to store the object.
-	StorageClass string `xml:"StorageClass,omitempty"`
+	StorageClass string `xml:"StorageClass"`
 }
 
 // ObjectVersionResponse container for object version in the response of ListBucketObjectVersionsHandler.
@@ -121,7 +121,7 @@ type ObjectVersionResponse struct {
 	LastModified string `xml:"LastModified"`
 	Owner        Owner  `xml:"Owner"`
 	Size         uint64 `xml:"Size"`
-	StorageClass string `xml:"StorageClass,omitempty"` // is empty!!
+	StorageClass string `xml:"StorageClass"`
 	VersionID    string `xml:"VersionId"`
 }
 
diff --git a/api/headers.go b/api/headers.go
index bbffc24..0a51e64 100644
--- a/api/headers.go
+++ b/api/headers.go
@@ -61,6 +61,7 @@ const (
 	AmzObjectAttributes          = "X-Amz-Object-Attributes"
 	AmzMaxParts                  = "X-Amz-Max-Parts"
 	AmzPartNumberMarker          = "X-Amz-Part-Number-Marker"
+	AmzStorageClass              = "X-Amz-Storage-Class"
 
 	AmzServerSideEncryptionCustomerAlgorithm = "x-amz-server-side-encryption-customer-algorithm"
 	AmzServerSideEncryptionCustomerKey       = "x-amz-server-side-encryption-customer-key"
@@ -89,6 +90,8 @@ const (
 	DefaultLocationConstraint = "default"
 
 	StreamingContentSHA256 = "STREAMING-AWS4-HMAC-SHA256-PAYLOAD"
+
+	DefaultStorageClass = "STANDARD"
 )
 
 // S3 request query params.