diff --git a/api/handler/object_list.go b/api/handler/object_list.go
index 5119707..502b8d2 100644
--- a/api/handler/object_list.go
+++ b/api/handler/object_list.go
@@ -4,6 +4,7 @@ import (
 	"net/http"
 	"net/url"
 	"strconv"
+	"strings"
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
@@ -153,6 +154,10 @@ func parseListObjectArgs(reqInfo *middleware.ReqInfo) (*layer.ListObjectsParamsC
 	res.Delimiter = queryValues.Get("delimiter")
 	res.Encode = queryValues.Get("encoding-type")
 
+	if res.Encode != "" && strings.ToLower(res.Encode) != urlEncodingType {
+		return nil, errors.GetAPIError(errors.ErrInvalidEncodingMethod)
+	}
+
 	if queryValues.Get("max-keys") == "" {
 		res.MaxKeys = maxObjectList
 	} else if res.MaxKeys, err = strconv.Atoi(queryValues.Get("max-keys")); err != nil || res.MaxKeys < 0 {
@@ -257,6 +262,10 @@ func parseListObjectVersionsRequest(reqInfo *middleware.ReqInfo) (*layer.ListObj
 	res.Encode = queryValues.Get("encoding-type")
 	res.VersionIDMarker = queryValues.Get("version-id-marker")
 
+	if res.Encode != "" && strings.ToLower(res.Encode) != urlEncodingType {
+		return nil, errors.GetAPIError(errors.ErrInvalidEncodingMethod)
+	}
+
 	if res.VersionIDMarker != "" && res.KeyMarker == "" {
 		return nil, errors.GetAPIError(errors.VersionIDMarkerWithoutKeyMarker)
 	}
diff --git a/api/handler/object_list_test.go b/api/handler/object_list_test.go
index 6c9605e..5a13953 100644
--- a/api/handler/object_list_test.go
+++ b/api/handler/object_list_test.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"net/http"
+	"net/http/httptest"
 	"net/url"
 	"sort"
 	"strconv"
@@ -14,6 +15,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/cache"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
+	apierr "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
@@ -755,6 +757,16 @@ func TestListObjectVersionsEncoding(t *testing.T) {
 	require.Equal(t, 3, listResponse.MaxKeys)
 }
 
+func TestListingsWithInvalidEncodingType(t *testing.T) {
+	hc := prepareHandlerContext(t)
+	bktName := "bucket-for-listing-invalid-encoding"
+	createTestBucket(hc, bktName)
+
+	listObjectsVersionsErr(hc, bktName, "invalid", apierr.GetAPIError(apierr.ErrInvalidEncodingMethod))
+	listObjectsV2Err(hc, bktName, "invalid", apierr.GetAPIError(apierr.ErrInvalidEncodingMethod))
+	listObjectsV1Err(hc, bktName, "invalid", apierr.GetAPIError(apierr.ErrInvalidEncodingMethod))
+}
+
 func checkVersionsNames(t *testing.T, versions *ListObjectsVersionsResponse, names []string) {
 	for i, v := range versions.Version {
 		require.Equal(t, names[i], v.Key)
@@ -762,10 +774,19 @@ func checkVersionsNames(t *testing.T, versions *ListObjectsVersionsResponse, nam
 }
 
 func listObjectsV2(hc *handlerContext, bktName, prefix, delimiter, startAfter, continuationToken string, maxKeys int) *ListObjectsV2Response {
-	return listObjectsV2Ext(hc, bktName, prefix, delimiter, startAfter, continuationToken, "", maxKeys)
+	w := listObjectsV2Base(hc, bktName, prefix, delimiter, startAfter, continuationToken, "", maxKeys)
+	assertStatus(hc.t, w, http.StatusOK)
+	res := &ListObjectsV2Response{}
+	parseTestResponse(hc.t, w, res)
+	return res
 }
 
-func listObjectsV2Ext(hc *handlerContext, bktName, prefix, delimiter, startAfter, continuationToken, encodingType string, maxKeys int) *ListObjectsV2Response {
+func listObjectsV2Err(hc *handlerContext, bktName, encoding string, err apierr.Error) {
+	w := listObjectsV2Base(hc, bktName, "", "", "", "", encoding, -1)
+	assertS3Error(hc.t, w, err)
+}
+
+func listObjectsV2Base(hc *handlerContext, bktName, prefix, delimiter, startAfter, continuationToken, encodingType string, maxKeys int) *httptest.ResponseRecorder {
 	query := prepareCommonListObjectsQuery(prefix, delimiter, maxKeys)
 	query.Add("fetch-owner", "true")
 	if len(startAfter) != 0 {
@@ -780,10 +801,7 @@ func listObjectsV2Ext(hc *handlerContext, bktName, prefix, delimiter, startAfter
 
 	w, r := prepareTestFullRequest(hc, bktName, "", query, nil)
 	hc.Handler().ListObjectsV2Handler(w, r)
-	assertStatus(hc.t, w, http.StatusOK)
-	res := &ListObjectsV2Response{}
-	parseTestResponse(hc.t, w, res)
-	return res
+	return w
 }
 
 func validateListV1(t *testing.T, tc *handlerContext, bktName, prefix, delimiter, marker string, maxKeys int,
@@ -843,28 +861,54 @@ func prepareCommonListObjectsQuery(prefix, delimiter string, maxKeys int) url.Va
 }
 
 func listObjectsV1(hc *handlerContext, bktName, prefix, delimiter, marker string, maxKeys int) *ListObjectsV1Response {
-	query := prepareCommonListObjectsQuery(prefix, delimiter, maxKeys)
-	if len(marker) != 0 {
-		query.Add("marker", marker)
-	}
-
-	w, r := prepareTestFullRequest(hc, bktName, "", query, nil)
-	hc.Handler().ListObjectsV1Handler(w, r)
+	w := listObjectsV1Base(hc, bktName, prefix, delimiter, marker, "", maxKeys)
 	assertStatus(hc.t, w, http.StatusOK)
 	res := &ListObjectsV1Response{}
 	parseTestResponse(hc.t, w, res)
 	return res
 }
 
+func listObjectsV1Err(hc *handlerContext, bktName, encoding string, err apierr.Error) {
+	w := listObjectsV1Base(hc, bktName, "", "", "", encoding, -1)
+	assertS3Error(hc.t, w, err)
+}
+
+func listObjectsV1Base(hc *handlerContext, bktName, prefix, delimiter, marker, encoding string, maxKeys int) *httptest.ResponseRecorder {
+	query := prepareCommonListObjectsQuery(prefix, delimiter, maxKeys)
+	if len(marker) != 0 {
+		query.Add("marker", marker)
+	}
+	if len(encoding) != 0 {
+		query.Add("encoding-type", encoding)
+	}
+
+	w, r := prepareTestFullRequest(hc, bktName, "", query, nil)
+	hc.Handler().ListObjectsV1Handler(w, r)
+	return w
+}
+
 func listObjectsVersions(hc *handlerContext, bktName, prefix, delimiter, keyMarker, versionIDMarker string, maxKeys int) *ListObjectsVersionsResponse {
-	return listObjectsVersionsBase(hc, bktName, prefix, delimiter, keyMarker, versionIDMarker, maxKeys, false)
+	w := listObjectsVersionsBase(hc, bktName, prefix, delimiter, keyMarker, versionIDMarker, "", maxKeys)
+	assertStatus(hc.t, w, http.StatusOK)
+	res := &ListObjectsVersionsResponse{}
+	parseTestResponse(hc.t, w, res)
+	return res
 }
 
 func listObjectsVersionsURL(hc *handlerContext, bktName, prefix, delimiter, keyMarker, versionIDMarker string, maxKeys int) *ListObjectsVersionsResponse {
-	return listObjectsVersionsBase(hc, bktName, prefix, delimiter, keyMarker, versionIDMarker, maxKeys, true)
+	w := listObjectsVersionsBase(hc, bktName, prefix, delimiter, keyMarker, versionIDMarker, urlEncodingType, maxKeys)
+	assertStatus(hc.t, w, http.StatusOK)
+	res := &ListObjectsVersionsResponse{}
+	parseTestResponse(hc.t, w, res)
+	return res
 }
 
-func listObjectsVersionsBase(hc *handlerContext, bktName, prefix, delimiter, keyMarker, versionIDMarker string, maxKeys int, encode bool) *ListObjectsVersionsResponse {
+func listObjectsVersionsErr(hc *handlerContext, bktName, encoding string, err apierr.Error) {
+	w := listObjectsVersionsBase(hc, bktName, "", "", "", "", encoding, -1)
+	assertS3Error(hc.t, w, err)
+}
+
+func listObjectsVersionsBase(hc *handlerContext, bktName, prefix, delimiter, keyMarker, versionIDMarker, encoding string, maxKeys int) *httptest.ResponseRecorder {
 	query := prepareCommonListObjectsQuery(prefix, delimiter, maxKeys)
 	if len(keyMarker) != 0 {
 		query.Add("key-marker", keyMarker)
@@ -872,14 +916,11 @@ func listObjectsVersionsBase(hc *handlerContext, bktName, prefix, delimiter, key
 	if len(versionIDMarker) != 0 {
 		query.Add("version-id-marker", versionIDMarker)
 	}
-	if encode {
-		query.Add("encoding-type", "url")
+	if len(encoding) != 0 {
+		query.Add("encoding-type", encoding)
 	}
 
 	w, r := prepareTestFullRequest(hc, bktName, "", query, nil)
 	hc.Handler().ListBucketObjectVersionsHandler(w, r)
-	assertStatus(hc.t, w, http.StatusOK)
-	res := &ListObjectsVersionsResponse{}
-	parseTestResponse(hc.t, w, res)
-	return res
+	return w
 }