diff --git a/api/handler/encryption_test.go b/api/handler/encryption_test.go
index 68f76e93..d43721de 100644
--- a/api/handler/encryption_test.go
+++ b/api/handler/encryption_test.go
@@ -16,6 +16,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
 	"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/frostfs"
 	"github.com/stretchr/testify/require"
 )
 
@@ -37,7 +38,7 @@ func TestSimpleGetEncrypted(t *testing.T) {
 
 	objInfo, err := tc.Layer().GetObjectInfo(tc.Context(), &layer.HeadObjectParams{BktInfo: bktInfo, Object: objName})
 	require.NoError(t, err)
-	obj, err := tc.MockedPool().GetObject(tc.Context(), layer.PrmObjectGet{Container: bktInfo.CID, Object: objInfo.ID})
+	obj, err := tc.MockedPool().GetObject(tc.Context(), frostfs.PrmObjectGet{Container: bktInfo.CID, Object: objInfo.ID})
 	require.NoError(t, err)
 	encryptedContent, err := io.ReadAll(obj.Payload)
 	require.NoError(t, err)
diff --git a/api/handler/handlers_test.go b/api/handler/handlers_test.go
index 7f30e915..dc32ff91 100644
--- a/api/handler/handlers_test.go
+++ b/api/handler/handlers_test.go
@@ -20,6 +20,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	"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/api/layer/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/resolver"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
@@ -387,7 +388,7 @@ func createTestBucket(hc *handlerContext, bktName string) *data.BucketInfo {
 }
 
 func createTestBucketWithLock(hc *handlerContext, bktName string, conf *data.ObjectLockConfiguration) *data.BucketInfo {
-	res, err := hc.MockedPool().CreateContainer(hc.Context(), layer.PrmContainerCreate{
+	res, err := hc.MockedPool().CreateContainer(hc.Context(), frostfs.PrmContainerCreate{
 		Creator:              hc.owner,
 		Name:                 bktName,
 		AdditionalAttributes: [][2]string{{layer.AttributeLockEnabled, "true"}},
diff --git a/api/handler/util.go b/api/handler/util.go
index 48b5eae1..23a087a4 100644
--- a/api/handler/util.go
+++ b/api/handler/util.go
@@ -12,6 +12,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	s3errors "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/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	frosterrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/errors"
@@ -67,12 +68,12 @@ func transformToS3Error(err error) error {
 		return err
 	}
 
-	if errors.Is(err, layer.ErrAccessDenied) ||
+	if errors.Is(err, frostfs.ErrAccessDenied) ||
 		errors.Is(err, tree.ErrNodeAccessDenied) {
 		return s3errors.GetAPIError(s3errors.ErrAccessDenied)
 	}
 
-	if errors.Is(err, layer.ErrGatewayTimeout) {
+	if errors.Is(err, frostfs.ErrGatewayTimeout) {
 		return s3errors.GetAPIError(s3errors.ErrGatewayTimeout)
 	}
 
diff --git a/api/handler/util_test.go b/api/handler/util_test.go
index 6b18b42f..f0eb4e1d 100644
--- a/api/handler/util_test.go
+++ b/api/handler/util_test.go
@@ -6,7 +6,7 @@ import (
 	"testing"
 
 	s3errors "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/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/tree"
 	"github.com/stretchr/testify/require"
 )
@@ -24,12 +24,12 @@ func TestTransformS3Errors(t *testing.T) {
 		},
 		{
 			name:     "layer access denied error to s3 access denied error",
-			err:      layer.ErrAccessDenied,
+			err:      frostfs.ErrAccessDenied,
 			expected: s3errors.ErrAccessDenied,
 		},
 		{
 			name:     "wrapped layer access denied error to s3 access denied error",
-			err:      fmt.Errorf("wrap: %w", layer.ErrAccessDenied),
+			err:      fmt.Errorf("wrap: %w", frostfs.ErrAccessDenied),
 			expected: s3errors.ErrAccessDenied,
 		},
 		{
@@ -39,7 +39,7 @@ func TestTransformS3Errors(t *testing.T) {
 		},
 		{
 			name:     "layer gateway timeout error to s3 gateway timeout error",
-			err:      layer.ErrGatewayTimeout,
+			err:      frostfs.ErrGatewayTimeout,
 			expected: s3errors.ErrGatewayTimeout,
 		},
 		{
diff --git a/api/layer/container.go b/api/layer/container.go
index 2c8f94dd..622dc4f4 100644
--- a/api/layer/container.go
+++ b/api/layer/container.go
@@ -8,6 +8,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
@@ -20,7 +21,7 @@ const (
 	AttributeLockEnabled        = "LockEnabled"
 )
 
-func (n *Layer) containerInfo(ctx context.Context, prm PrmContainer) (*data.BucketInfo, error) {
+func (n *Layer) containerInfo(ctx context.Context, prm frostfs.PrmContainer) (*data.BucketInfo, error) {
 	var (
 		err error
 		res *container.Container
@@ -77,7 +78,7 @@ func (n *Layer) containerInfo(ctx context.Context, prm PrmContainer) (*data.Buck
 func (n *Layer) containerList(ctx context.Context) ([]*data.BucketInfo, error) {
 	stoken := n.SessionTokenForRead(ctx)
 
-	prm := PrmUserContainers{
+	prm := frostfs.PrmUserContainers{
 		UserID:       n.BearerOwner(ctx),
 		SessionToken: stoken,
 	}
@@ -90,7 +91,7 @@ func (n *Layer) containerList(ctx context.Context) ([]*data.BucketInfo, error) {
 
 	list := make([]*data.BucketInfo, 0, len(res))
 	for i := range res {
-		getPrm := PrmContainer{
+		getPrm := frostfs.PrmContainer{
 			ContainerID:  res[i],
 			SessionToken: stoken,
 		}
@@ -132,7 +133,7 @@ func (n *Layer) createContainer(ctx context.Context, p *CreateBucketParams) (*da
 		})
 	}
 
-	res, err := n.frostFS.CreateContainer(ctx, PrmContainerCreate{
+	res, err := n.frostFS.CreateContainer(ctx, frostfs.PrmContainerCreate{
 		Creator:              bktInfo.Owner,
 		Policy:               p.Policy,
 		Name:                 p.Name,
diff --git a/api/layer/cors.go b/api/layer/cors.go
index 44549c3b..dfefd095 100644
--- a/api/layer/cors.go
+++ b/api/layer/cors.go
@@ -9,6 +9,7 @@ import (
 
 	"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/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
@@ -39,7 +40,7 @@ func (n *Layer) PutBucketCORS(ctx context.Context, p *PutCORSParams) error {
 		return err
 	}
 
-	prm := PrmObjectCreate{
+	prm := frostfs.PrmObjectCreate{
 		Payload:      &buf,
 		Filepath:     p.BktInfo.CORSObjectName(),
 		CreationTime: TimeNow(ctx),
@@ -80,7 +81,7 @@ func (n *Layer) PutBucketCORS(ctx context.Context, p *PutCORSParams) error {
 
 // deleteCORSObject removes object and logs in case of error.
 func (n *Layer) deleteCORSObject(ctx context.Context, bktInfo *data.BucketInfo, addr oid.Address) {
-	var prmAuth PrmAuth
+	var prmAuth frostfs.PrmAuth
 	corsBkt := bktInfo
 	if !addr.Container().Equals(bktInfo.CID) && !addr.Container().Equals(cid.ID{}) {
 		corsBkt = &data.BucketInfo{CID: addr.Container()}
diff --git a/api/layer/frostfs.go b/api/layer/frostfs/frostfs.go
similarity index 99%
rename from api/layer/frostfs.go
rename to api/layer/frostfs/frostfs.go
index 3f01f2f7..26340dc8 100644
--- a/api/layer/frostfs.go
+++ b/api/layer/frostfs/frostfs.go
@@ -1,4 +1,4 @@
-package layer
+package frostfs
 
 import (
 	"context"
diff --git a/api/layer/frostfs_mock.go b/api/layer/frostfs_mock.go
index b416dcc9..30395092 100644
--- a/api/layer/frostfs_mock.go
+++ b/api/layer/frostfs_mock.go
@@ -12,6 +12,7 @@ import (
 
 	v2container "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/container"
 	objectv2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/checksum"
@@ -61,7 +62,7 @@ func (k *FeatureSettingsMock) FormContainerZone(ns string) string {
 }
 
 type TestFrostFS struct {
-	FrostFS
+	frostfs.FrostFS
 
 	objects         map[string]*object.Object
 	objectErrors    map[string]error
@@ -139,7 +140,7 @@ func (t *TestFrostFS) SetContainer(cnrID cid.ID, cnr *container.Container) {
 	t.containers[cnrID.EncodeToString()] = cnr
 }
 
-func (t *TestFrostFS) CreateContainer(_ context.Context, prm PrmContainerCreate) (*ContainerCreateResult, error) {
+func (t *TestFrostFS) CreateContainer(_ context.Context, prm frostfs.PrmContainerCreate) (*frostfs.ContainerCreateResult, error) {
 	var cnr container.Container
 	cnr.Init()
 	cnr.SetOwner(prm.Creator)
@@ -174,7 +175,7 @@ func (t *TestFrostFS) CreateContainer(_ context.Context, prm PrmContainerCreate)
 	id.SetSHA256(sha256.Sum256(b))
 	t.containers[id.EncodeToString()] = &cnr
 
-	return &ContainerCreateResult{ContainerID: id}, nil
+	return &frostfs.ContainerCreateResult{ContainerID: id}, nil
 }
 
 func (t *TestFrostFS) DeleteContainer(_ context.Context, cnrID cid.ID, _ *session.Container) error {
@@ -183,7 +184,7 @@ func (t *TestFrostFS) DeleteContainer(_ context.Context, cnrID cid.ID, _ *sessio
 	return nil
 }
 
-func (t *TestFrostFS) Container(_ context.Context, prm PrmContainer) (*container.Container, error) {
+func (t *TestFrostFS) Container(_ context.Context, prm frostfs.PrmContainer) (*container.Container, error) {
 	for k, v := range t.containers {
 		if k == prm.ContainerID.EncodeToString() {
 			return v, nil
@@ -193,7 +194,7 @@ func (t *TestFrostFS) Container(_ context.Context, prm PrmContainer) (*container
 	return nil, fmt.Errorf("container not found %s", prm.ContainerID)
 }
 
-func (t *TestFrostFS) UserContainers(context.Context, PrmUserContainers) ([]cid.ID, error) {
+func (t *TestFrostFS) UserContainers(context.Context, frostfs.PrmUserContainers) ([]cid.ID, error) {
 	var res []cid.ID
 	for k := range t.containers {
 		var idCnr cid.ID
@@ -220,7 +221,7 @@ func (t *TestFrostFS) retrieveObject(ctx context.Context, cnrID cid.ID, objID oi
 	if obj, ok := t.objects[sAddr]; ok {
 		owner := getBearerOwner(ctx)
 		if !t.checkAccess(cnrID, owner) {
-			return nil, ErrAccessDenied
+			return nil, frostfs.ErrAccessDenied
 		}
 
 		return obj, nil
@@ -229,23 +230,23 @@ func (t *TestFrostFS) retrieveObject(ctx context.Context, cnrID cid.ID, objID oi
 	return nil, fmt.Errorf("%w: %s", &apistatus.ObjectNotFound{}, addr)
 }
 
-func (t *TestFrostFS) HeadObject(ctx context.Context, prm PrmObjectHead) (*object.Object, error) {
+func (t *TestFrostFS) HeadObject(ctx context.Context, prm frostfs.PrmObjectHead) (*object.Object, error) {
 	return t.retrieveObject(ctx, prm.Container, prm.Object)
 }
 
-func (t *TestFrostFS) GetObject(ctx context.Context, prm PrmObjectGet) (*Object, error) {
+func (t *TestFrostFS) GetObject(ctx context.Context, prm frostfs.PrmObjectGet) (*frostfs.Object, error) {
 	obj, err := t.retrieveObject(ctx, prm.Container, prm.Object)
 	if err != nil {
 		return nil, err
 	}
 
-	return &Object{
+	return &frostfs.Object{
 		Header:  *obj,
 		Payload: io.NopCloser(bytes.NewReader(obj.Payload())),
 	}, nil
 }
 
-func (t *TestFrostFS) RangeObject(ctx context.Context, prm PrmObjectRange) (io.ReadCloser, error) {
+func (t *TestFrostFS) RangeObject(ctx context.Context, prm frostfs.PrmObjectRange) (io.ReadCloser, error) {
 	obj, err := t.retrieveObject(ctx, prm.Container, prm.Object)
 	if err != nil {
 		return nil, err
@@ -257,7 +258,7 @@ func (t *TestFrostFS) RangeObject(ctx context.Context, prm PrmObjectRange) (io.R
 	return io.NopCloser(bytes.NewReader(payload)), nil
 }
 
-func (t *TestFrostFS) CreateObject(_ context.Context, prm PrmObjectCreate) (*CreateObjectResult, error) {
+func (t *TestFrostFS) CreateObject(_ context.Context, prm frostfs.PrmObjectCreate) (*frostfs.CreateObjectResult, error) {
 	b := make([]byte, 32)
 	if _, err := io.ReadFull(rand.Reader, b); err != nil {
 		return nil, err
@@ -327,13 +328,13 @@ func (t *TestFrostFS) CreateObject(_ context.Context, prm PrmObjectCreate) (*Cre
 
 	addr := newAddress(cnrID, objID)
 	t.objects[addr.EncodeToString()] = obj
-	return &CreateObjectResult{
+	return &frostfs.CreateObjectResult{
 		ObjectID:      objID,
 		CreationEpoch: t.currentEpoch - 1,
 	}, nil
 }
 
-func (t *TestFrostFS) DeleteObject(ctx context.Context, prm PrmObjectDelete) error {
+func (t *TestFrostFS) DeleteObject(ctx context.Context, prm frostfs.PrmObjectDelete) error {
 	var addr oid.Address
 	addr.SetContainer(prm.Container)
 	addr.SetObject(prm.Object)
@@ -345,7 +346,7 @@ func (t *TestFrostFS) DeleteObject(ctx context.Context, prm PrmObjectDelete) err
 	if _, ok := t.objects[addr.EncodeToString()]; ok {
 		owner := getBearerOwner(ctx)
 		if !t.checkAccess(prm.Container, owner) {
-			return ErrAccessDenied
+			return frostfs.ErrAccessDenied
 		}
 
 		delete(t.objects, addr.EncodeToString())
@@ -372,7 +373,7 @@ func (t *TestFrostFS) AllObjects(cnrID cid.ID) []oid.ID {
 	return result
 }
 
-func (t *TestFrostFS) SearchObjects(_ context.Context, prm PrmObjectSearch) ([]oid.ID, error) {
+func (t *TestFrostFS) SearchObjects(_ context.Context, prm frostfs.PrmObjectSearch) ([]oid.ID, error) {
 	filters := object.NewSearchFilters()
 	filters.AddRootFilter()
 
@@ -416,7 +417,7 @@ func (t *TestFrostFS) NetworkInfo(context.Context) (netmap.NetworkInfo, error) {
 	return ni, nil
 }
 
-func (t *TestFrostFS) PatchObject(ctx context.Context, prm PrmObjectPatch) (oid.ID, error) {
+func (t *TestFrostFS) PatchObject(ctx context.Context, prm frostfs.PrmObjectPatch) (oid.ID, error) {
 	obj, err := t.retrieveObject(ctx, prm.Container, prm.Object)
 	if err != nil {
 		return oid.ID{}, err
diff --git a/api/layer/layer.go b/api/layer/layer.go
index 09ba4b52..172b5d23 100644
--- a/api/layer/layer.go
+++ b/api/layer/layer.go
@@ -20,6 +20,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
 	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
@@ -47,7 +48,7 @@ type (
 	}
 
 	Layer struct {
-		frostFS          FrostFS
+		frostFS          frostfs.FrostFS
 		gateOwner        user.ID
 		log              *zap.Logger
 		anonKey          AnonymousKey
@@ -236,7 +237,7 @@ func (p HeadObjectParams) Versioned() bool {
 
 // NewLayer creates an instance of a Layer. It checks credentials
 // and establishes gRPC connection with the node.
-func NewLayer(log *zap.Logger, frostFS FrostFS, config *Config) *Layer {
+func NewLayer(log *zap.Logger, frostFS frostfs.FrostFS, config *Config) *Layer {
 	return &Layer{
 		frostFS:          frostFS,
 		log:              log,
@@ -300,7 +301,7 @@ func (n *Layer) reqLogger(ctx context.Context) *zap.Logger {
 	return n.log
 }
 
-func (n *Layer) prepareAuthParameters(ctx context.Context, prm *PrmAuth, bktOwner user.ID) {
+func (n *Layer) prepareAuthParameters(ctx context.Context, prm *frostfs.PrmAuth, bktOwner user.ID) {
 	if prm.BearerToken != nil || prm.PrivateKey != nil {
 		return
 	}
@@ -337,7 +338,7 @@ func (n *Layer) GetBucketInfo(ctx context.Context, name string) (*data.BucketInf
 		return nil, err
 	}
 
-	prm := PrmContainer{
+	prm := frostfs.PrmContainer{
 		ContainerID:  containerID,
 		SessionToken: n.SessionTokenForRead(ctx),
 	}
diff --git a/api/layer/lifecycle.go b/api/layer/lifecycle.go
index 2def9d14..dd84deea 100644
--- a/api/layer/lifecycle.go
+++ b/api/layer/lifecycle.go
@@ -11,6 +11,7 @@ import (
 
 	"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/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
@@ -26,7 +27,7 @@ type PutBucketLifecycleParams struct {
 }
 
 func (n *Layer) PutBucketLifecycleConfiguration(ctx context.Context, p *PutBucketLifecycleParams) error {
-	prm := PrmObjectCreate{
+	prm := frostfs.PrmObjectCreate{
 		Payload:      p.LifecycleReader,
 		Filepath:     p.BktInfo.LifecycleConfigurationObjectName(),
 		CreationTime: TimeNow(ctx),
@@ -78,7 +79,7 @@ func (n *Layer) PutBucketLifecycleConfiguration(ctx context.Context, p *PutBucke
 
 // deleteLifecycleObject removes object and logs in case of error.
 func (n *Layer) deleteLifecycleObject(ctx context.Context, bktInfo *data.BucketInfo, addr oid.Address) {
-	var prmAuth PrmAuth
+	var prmAuth frostfs.PrmAuth
 	lifecycleBkt := bktInfo
 	if !addr.Container().Equals(bktInfo.CID) {
 		lifecycleBkt = &data.BucketInfo{CID: addr.Container()}
@@ -108,7 +109,7 @@ func (n *Layer) GetBucketLifecycleConfiguration(ctx context.Context, bktInfo *da
 		return nil, fmt.Errorf("%w: %s", apiErr.GetAPIError(apiErr.ErrNoSuchLifecycleConfiguration), err.Error())
 	}
 
-	var prmAuth PrmAuth
+	var prmAuth frostfs.PrmAuth
 	lifecycleBkt := bktInfo
 	if !addr.Container().Equals(bktInfo.CID) {
 		lifecycleBkt = &data.BucketInfo{CID: addr.Container()}
diff --git a/api/layer/multipart_upload.go b/api/layer/multipart_upload.go
index 212626fb..c73b47f8 100644
--- a/api/layer/multipart_upload.go
+++ b/api/layer/multipart_upload.go
@@ -19,6 +19,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
@@ -214,7 +215,7 @@ func (n *Layer) uploadPart(ctx context.Context, multipartInfo *data.MultipartInf
 	}
 
 	bktInfo := p.Info.Bkt
-	prm := PrmObjectCreate{
+	prm := frostfs.PrmObjectCreate{
 		Container:    bktInfo.CID,
 		Attributes:   make([][2]string, 2),
 		Payload:      p.Reader,
@@ -246,7 +247,7 @@ func (n *Layer) uploadPart(ctx context.Context, multipartInfo *data.MultipartInf
 			return nil, s3errors.GetAPIError(s3errors.ErrInvalidDigest)
 		}
 		if hex.EncodeToString(hashBytes) != hex.EncodeToString(createdObj.MD5Sum) {
-			prm := PrmObjectDelete{
+			prm := frostfs.PrmObjectDelete{
 				Object:    createdObj.ID,
 				Container: bktInfo.CID,
 			}
diff --git a/api/layer/object.go b/api/layer/object.go
index 4780ee5c..a5cfcf9a 100644
--- a/api/layer/object.go
+++ b/api/layer/object.go
@@ -21,6 +21,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	apiErrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/detector"
@@ -71,7 +72,7 @@ func newAddress(cnr cid.ID, obj oid.ID) oid.Address {
 
 // objectHead returns all object's headers.
 func (n *Layer) objectHead(ctx context.Context, bktInfo *data.BucketInfo, idObj oid.ID) (*object.Object, error) {
-	prm := PrmObjectHead{
+	prm := frostfs.PrmObjectHead{
 		Container: bktInfo.CID,
 		Object:    idObj,
 	}
@@ -129,11 +130,11 @@ func (n *Layer) initObjectPayloadReader(ctx context.Context, p getParams) (io.Re
 // initializes payload reader of the FrostFS object.
 // Zero range corresponds to full payload (panics if only offset is set).
 func (n *Layer) initFrostFSObjectPayloadReader(ctx context.Context, p getFrostFSParams) (io.Reader, error) {
-	var prmAuth PrmAuth
+	var prmAuth frostfs.PrmAuth
 	n.prepareAuthParameters(ctx, &prmAuth, p.bktInfo.Owner)
 
 	if p.off+p.ln != 0 {
-		prm := PrmObjectRange{
+		prm := frostfs.PrmObjectRange{
 			PrmAuth:      prmAuth,
 			Container:    p.bktInfo.CID,
 			Object:       p.oid,
@@ -143,7 +144,7 @@ func (n *Layer) initFrostFSObjectPayloadReader(ctx context.Context, p getFrostFS
 		return n.frostFS.RangeObject(ctx, prm)
 	}
 
-	prm := PrmObjectGet{
+	prm := frostfs.PrmObjectGet{
 		PrmAuth:   prmAuth,
 		Container: p.bktInfo.CID,
 		Object:    p.oid,
@@ -158,17 +159,17 @@ func (n *Layer) initFrostFSObjectPayloadReader(ctx context.Context, p getFrostFS
 }
 
 // objectGet returns an object with payload in the object.
-func (n *Layer) objectGet(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID) (*Object, error) {
-	return n.objectGetBase(ctx, bktInfo, objID, PrmAuth{})
+func (n *Layer) objectGet(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID) (*frostfs.Object, error) {
+	return n.objectGetBase(ctx, bktInfo, objID, frostfs.PrmAuth{})
 }
 
 // objectGetWithAuth returns an object with payload in the object. Uses provided PrmAuth.
-func (n *Layer) objectGetWithAuth(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID, auth PrmAuth) (*Object, error) {
+func (n *Layer) objectGetWithAuth(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID, auth frostfs.PrmAuth) (*frostfs.Object, error) {
 	return n.objectGetBase(ctx, bktInfo, objID, auth)
 }
 
-func (n *Layer) objectGetBase(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID, auth PrmAuth) (*Object, error) {
-	prm := PrmObjectGet{
+func (n *Layer) objectGetBase(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID, auth frostfs.PrmAuth) (*frostfs.Object, error) {
+	prm := frostfs.PrmObjectGet{
 		PrmAuth:   auth,
 		Container: bktInfo.CID,
 		Object:    objID,
@@ -263,7 +264,7 @@ func (n *Layer) PutObject(ctx context.Context, p *PutObjectParams) (*data.Extend
 		}
 	}
 
-	prm := PrmObjectCreate{
+	prm := frostfs.PrmObjectCreate{
 		Container:    p.BktInfo.CID,
 		Filepath:     p.Object,
 		Payload:      r,
@@ -485,16 +486,16 @@ func (n *Layer) headVersion(ctx context.Context, bkt *data.BucketInfo, p *HeadOb
 
 // objectDelete puts tombstone object into frostfs.
 func (n *Layer) objectDelete(ctx context.Context, bktInfo *data.BucketInfo, idObj oid.ID) error {
-	return n.objectDeleteBase(ctx, bktInfo, idObj, PrmAuth{})
+	return n.objectDeleteBase(ctx, bktInfo, idObj, frostfs.PrmAuth{})
 }
 
 // objectDeleteWithAuth puts tombstone object into frostfs. Uses provided PrmAuth.
-func (n *Layer) objectDeleteWithAuth(ctx context.Context, bktInfo *data.BucketInfo, idObj oid.ID, auth PrmAuth) error {
+func (n *Layer) objectDeleteWithAuth(ctx context.Context, bktInfo *data.BucketInfo, idObj oid.ID, auth frostfs.PrmAuth) error {
 	return n.objectDeleteBase(ctx, bktInfo, idObj, auth)
 }
 
-func (n *Layer) objectDeleteBase(ctx context.Context, bktInfo *data.BucketInfo, idObj oid.ID, auth PrmAuth) error {
-	prm := PrmObjectDelete{
+func (n *Layer) objectDeleteBase(ctx context.Context, bktInfo *data.BucketInfo, idObj oid.ID, auth frostfs.PrmAuth) error {
+	prm := frostfs.PrmObjectDelete{
 		PrmAuth:   auth,
 		Container: bktInfo.CID,
 		Object:    idObj,
@@ -508,7 +509,7 @@ func (n *Layer) objectDeleteBase(ctx context.Context, bktInfo *data.BucketInfo,
 }
 
 // objectPutAndHash prepare auth parameters and invoke frostfs.CreateObject.
-func (n *Layer) objectPutAndHash(ctx context.Context, prm PrmObjectCreate, bktInfo *data.BucketInfo) (*data.CreatedObjectInfo, error) {
+func (n *Layer) objectPutAndHash(ctx context.Context, prm frostfs.PrmObjectCreate, bktInfo *data.BucketInfo) (*data.CreatedObjectInfo, error) {
 	n.prepareAuthParameters(ctx, &prm.PrmAuth, bktInfo.Owner)
 	prm.ClientCut = n.features.ClientCut()
 	prm.BufferMaxSize = n.features.BufferMaxSizeForPut()
diff --git a/api/layer/object_test.go b/api/layer/object_test.go
index d1c668b5..d94fec86 100644
--- a/api/layer/object_test.go
+++ b/api/layer/object_test.go
@@ -8,6 +8,7 @@ import (
 	"io"
 	"testing"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
 	"github.com/stretchr/testify/require"
 )
 
@@ -37,7 +38,7 @@ func TestGoroutinesDontLeakInPutAndHash(t *testing.T) {
 	require.NoError(t, err)
 	payload := bytes.NewReader(content)
 
-	prm := PrmObjectCreate{
+	prm := frostfs.PrmObjectCreate{
 		Filepath: tc.obj,
 		Payload:  payload,
 	}
diff --git a/api/layer/patch.go b/api/layer/patch.go
index 44d4e4f1..fca21427 100644
--- a/api/layer/patch.go
+++ b/api/layer/patch.go
@@ -12,6 +12,7 @@ import (
 
 	"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/layer/frostfs"
 )
 
 type PatchObjectParams struct {
@@ -32,7 +33,7 @@ func (n *Layer) PatchObject(ctx context.Context, p *PatchObjectParams) (*data.Ex
 		return n.patchMultipartObject(ctx, p)
 	}
 
-	prmPatch := PrmObjectPatch{
+	prmPatch := frostfs.PrmObjectPatch{
 		Container:  p.BktInfo.CID,
 		Object:     p.Object.ObjectInfo.ID,
 		Payload:    p.NewBytes,
@@ -74,13 +75,13 @@ func (n *Layer) PatchObject(ctx context.Context, p *PatchObjectParams) (*data.Ex
 	return p.Object, nil
 }
 
-func (n *Layer) patchObject(ctx context.Context, p PrmObjectPatch) (*data.CreatedObjectInfo, error) {
+func (n *Layer) patchObject(ctx context.Context, p frostfs.PrmObjectPatch) (*data.CreatedObjectInfo, error) {
 	objID, err := n.frostFS.PatchObject(ctx, p)
 	if err != nil {
 		return nil, fmt.Errorf("patch object: %w", err)
 	}
 
-	prmHead := PrmObjectHead{
+	prmHead := frostfs.PrmObjectHead{
 		PrmAuth:   p.PrmAuth,
 		Container: p.Container,
 		Object:    objID,
@@ -110,7 +111,7 @@ func (n *Layer) patchMultipartObject(ctx context.Context, p *PatchObjectParams)
 		return nil, fmt.Errorf("unmarshal combined object parts: %w", err)
 	}
 
-	prmPatch := PrmObjectPatch{
+	prmPatch := frostfs.PrmObjectPatch{
 		Container: p.BktInfo.CID,
 	}
 	n.prepareAuthParameters(ctx, &prmPatch.PrmAuth, p.BktInfo.Owner)
@@ -144,13 +145,13 @@ func (n *Layer) patchMultipartObject(ctx context.Context, p *PatchObjectParams)
 }
 
 // Returns patched part info, updated offset and length.
-func (n *Layer) patchPart(ctx context.Context, part *data.PartInfo, p *PatchObjectParams, prmPatch *PrmObjectPatch, off, ln uint64, lastPart bool) (*data.CreatedObjectInfo, uint64, uint64, error) {
+func (n *Layer) patchPart(ctx context.Context, part *data.PartInfo, p *PatchObjectParams, prmPatch *frostfs.PrmObjectPatch, off, ln uint64, lastPart bool) (*data.CreatedObjectInfo, uint64, uint64, error) {
 	if off == 0 && ln >= part.Size {
 		curLen := part.Size
 		if lastPart {
 			curLen = ln
 		}
-		prm := PrmObjectCreate{
+		prm := frostfs.PrmObjectCreate{
 			Container:    p.BktInfo.CID,
 			Payload:      io.LimitReader(p.NewBytes, int64(curLen)),
 			CreationTime: part.Created,
@@ -204,7 +205,7 @@ func (n *Layer) updateCombinedObject(ctx context.Context, parts []*data.PartInfo
 		headerParts.WriteString(headerPart)
 	}
 
-	prm := PrmObjectCreate{
+	prm := frostfs.PrmObjectCreate{
 		Container:    p.BktInfo.CID,
 		PayloadSize:  fullObjSize,
 		Filepath:     p.Object.ObjectInfo.Name,
diff --git a/api/layer/system_object.go b/api/layer/system_object.go
index 02156c51..8ec52820 100644
--- a/api/layer/system_object.go
+++ b/api/layer/system_object.go
@@ -12,6 +12,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
 	"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/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/tree"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
@@ -114,7 +115,7 @@ func (n *Layer) getNodeVersionFromCacheOrFrostfs(ctx context.Context, objVersion
 }
 
 func (n *Layer) putLockObject(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID, lock *data.ObjectLock, copiesNumber []uint32) (oid.ID, error) {
-	prm := PrmObjectCreate{
+	prm := frostfs.PrmObjectCreate{
 		Container:    bktInfo.CID,
 		Locks:        []oid.ID{objID},
 		CreationTime: TimeNow(ctx),
@@ -175,7 +176,7 @@ func (n *Layer) getCORS(ctx context.Context, bkt *data.BucketInfo) (*data.CORSCo
 		return nil, fmt.Errorf("%w: %s", errors.GetAPIError(errors.ErrNoSuchCORSConfiguration), err.Error())
 	}
 
-	var prmAuth PrmAuth
+	var prmAuth frostfs.PrmAuth
 	corsBkt := bkt
 	if !addr.Container().Equals(bkt.CID) && !addr.Container().Equals(cid.ID{}) {
 		corsBkt = &data.BucketInfo{CID: addr.Container()}
diff --git a/api/layer/versioning_test.go b/api/layer/versioning_test.go
index 533a39b8..2f49f75f 100644
--- a/api/layer/versioning_test.go
+++ b/api/layer/versioning_test.go
@@ -7,6 +7,7 @@ import (
 	"testing"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
 	bearertest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer/test"
@@ -154,7 +155,7 @@ func prepareContext(t *testing.T, cachesConfig ...*CachesConfig) *testContext {
 	tp := NewTestFrostFS(key)
 
 	bktName := "testbucket1"
-	res, err := tp.CreateContainer(ctx, PrmContainerCreate{
+	res, err := tp.CreateContainer(ctx, frostfs.PrmContainerCreate{
 		Name: bktName,
 	})
 	require.NoError(t, err)
diff --git a/internal/frostfs/authmate.go b/internal/frostfs/authmate.go
index ea0c5aa9..2936d3dc 100644
--- a/internal/frostfs/authmate.go
+++ b/internal/frostfs/authmate.go
@@ -9,7 +9,7 @@ import (
 	"time"
 
 	objectv2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/authmate"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/tokens"
@@ -28,18 +28,18 @@ const (
 
 // AuthmateFrostFS is a mediator which implements authmate.FrostFS through pool.Pool.
 type AuthmateFrostFS struct {
-	frostFS layer.FrostFS
+	frostFS frostfs.FrostFS
 	log     *zap.Logger
 }
 
 // NewAuthmateFrostFS creates new AuthmateFrostFS using provided pool.Pool.
-func NewAuthmateFrostFS(frostFS layer.FrostFS, log *zap.Logger) *AuthmateFrostFS {
+func NewAuthmateFrostFS(frostFS frostfs.FrostFS, log *zap.Logger) *AuthmateFrostFS {
 	return &AuthmateFrostFS{frostFS: frostFS, log: log}
 }
 
 // ContainerExists implements authmate.FrostFS interface method.
 func (x *AuthmateFrostFS) ContainerExists(ctx context.Context, idCnr cid.ID) error {
-	_, err := x.frostFS.Container(ctx, layer.PrmContainer{ContainerID: idCnr})
+	_, err := x.frostFS.Container(ctx, frostfs.PrmContainer{ContainerID: idCnr})
 	if err != nil {
 		return fmt.Errorf("get container via connection pool: %w", err)
 	}
@@ -60,7 +60,7 @@ func (x *AuthmateFrostFS) CreateContainer(ctx context.Context, prm authmate.PrmC
 	basicACL.AllowOp(acl.OpObjectHead, acl.RoleOthers)
 	basicACL.AllowOp(acl.OpObjectSearch, acl.RoleOthers)
 
-	res, err := x.frostFS.CreateContainer(ctx, layer.PrmContainerCreate{
+	res, err := x.frostFS.CreateContainer(ctx, frostfs.PrmContainerCreate{
 		Creator:  prm.Owner,
 		Policy:   prm.Policy,
 		Name:     prm.FriendlyName,
@@ -84,7 +84,7 @@ func (x *AuthmateFrostFS) GetCredsObject(ctx context.Context, addr oid.Address)
 		credObjID = last.ObjID
 	}
 
-	res, err := x.frostFS.GetObject(ctx, layer.PrmObjectGet{
+	res, err := x.frostFS.GetObject(ctx, frostfs.PrmObjectGet{
 		Container: addr.Container(),
 		Object:    credObjID,
 	})
@@ -137,7 +137,7 @@ func (x *AuthmateFrostFS) CreateObject(ctx context.Context, prm tokens.PrmObject
 		attributes = append(attributes, [2]string{attr.Key(), attr.Value()})
 	}
 
-	res, err := x.frostFS.CreateObject(ctx, layer.PrmObjectCreate{
+	res, err := x.frostFS.CreateObject(ctx, frostfs.PrmObjectCreate{
 		Container:  prm.Container,
 		Filepath:   prm.Filepath,
 		Attributes: attributes,
@@ -152,7 +152,7 @@ func (x *AuthmateFrostFS) CreateObject(ctx context.Context, prm tokens.PrmObject
 
 func (x *AuthmateFrostFS) getCredVersions(ctx context.Context, addr oid.Address) (*crdt.ObjectVersions, error) {
 	objCredSystemName := credVersionSysName(addr.Container(), addr.Object())
-	credVersions, err := x.frostFS.SearchObjects(ctx, layer.PrmObjectSearch{
+	credVersions, err := x.frostFS.SearchObjects(ctx, frostfs.PrmObjectSearch{
 		Container:      addr.Container(),
 		ExactAttribute: [2]string{accessBoxCRDTNameAttr, objCredSystemName},
 	})
@@ -163,7 +163,7 @@ func (x *AuthmateFrostFS) getCredVersions(ctx context.Context, addr oid.Address)
 	versions := crdt.NewObjectVersions(objCredSystemName)
 
 	for _, id := range credVersions {
-		objVersion, err := x.frostFS.HeadObject(ctx, layer.PrmObjectHead{
+		objVersion, err := x.frostFS.HeadObject(ctx, frostfs.PrmObjectHead{
 			Container: addr.Container(),
 			Object:    id,
 		})
diff --git a/internal/frostfs/frostfs.go b/internal/frostfs/frostfs.go
index 5fd935b7..9651854b 100644
--- a/internal/frostfs/frostfs.go
+++ b/internal/frostfs/frostfs.go
@@ -10,7 +10,7 @@ import (
 	"time"
 
 	objectv2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
 	errorsFrost "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
@@ -89,7 +89,7 @@ func (x *FrostFS) TimeToEpoch(ctx context.Context, now, futureTime time.Time) (u
 }
 
 // Container implements layer.FrostFS interface method.
-func (x *FrostFS) Container(ctx context.Context, layerPrm layer.PrmContainer) (*container.Container, error) {
+func (x *FrostFS) Container(ctx context.Context, layerPrm frostfs.PrmContainer) (*container.Container, error) {
 	prm := pool.PrmContainerGet{
 		ContainerID: layerPrm.ContainerID,
 		Session:     layerPrm.SessionToken,
@@ -104,7 +104,7 @@ func (x *FrostFS) Container(ctx context.Context, layerPrm layer.PrmContainer) (*
 }
 
 // CreateContainer implements layer.FrostFS interface method.
-func (x *FrostFS) CreateContainer(ctx context.Context, prm layer.PrmContainerCreate) (*layer.ContainerCreateResult, error) {
+func (x *FrostFS) CreateContainer(ctx context.Context, prm frostfs.PrmContainerCreate) (*frostfs.ContainerCreateResult, error) {
 	var cnr container.Container
 	cnr.Init()
 	cnr.SetPlacementPolicy(prm.Policy)
@@ -145,14 +145,14 @@ func (x *FrostFS) CreateContainer(ctx context.Context, prm layer.PrmContainerCre
 
 	// send request to save the container
 	idCnr, err := x.pool.PutContainer(ctx, prmPut)
-	return &layer.ContainerCreateResult{
+	return &frostfs.ContainerCreateResult{
 		ContainerID:             idCnr,
 		HomomorphicHashDisabled: container.IsHomomorphicHashingDisabled(cnr),
 	}, handleObjectError("save container via connection pool", err)
 }
 
 // UserContainers implements layer.FrostFS interface method.
-func (x *FrostFS) UserContainers(ctx context.Context, layerPrm layer.PrmUserContainers) ([]cid.ID, error) {
+func (x *FrostFS) UserContainers(ctx context.Context, layerPrm frostfs.PrmUserContainers) ([]cid.ID, error) {
 	prm := pool.PrmContainerList{
 		OwnerID: layerPrm.UserID,
 		Session: layerPrm.SessionToken,
@@ -171,7 +171,7 @@ func (x *FrostFS) DeleteContainer(ctx context.Context, id cid.ID, token *session
 }
 
 // CreateObject implements layer.FrostFS interface method.
-func (x *FrostFS) CreateObject(ctx context.Context, prm layer.PrmObjectCreate) (*layer.CreateObjectResult, error) {
+func (x *FrostFS) CreateObject(ctx context.Context, prm frostfs.PrmObjectCreate) (*frostfs.CreateObjectResult, error) {
 	attrNum := len(prm.Attributes) + 1 // + creation time
 
 	if prm.Filepath != "" {
@@ -243,7 +243,7 @@ func (x *FrostFS) CreateObject(ctx context.Context, prm layer.PrmObjectCreate) (
 		return nil, err
 	}
 
-	return &layer.CreateObjectResult{
+	return &frostfs.CreateObjectResult{
 		ObjectID:      res.ObjectID,
 		CreationEpoch: res.Epoch,
 	}, nil
@@ -264,7 +264,7 @@ func (x payloadReader) Read(p []byte) (int, error) {
 }
 
 // HeadObject implements layer.FrostFS interface method.
-func (x *FrostFS) HeadObject(ctx context.Context, prm layer.PrmObjectHead) (*object.Object, error) {
+func (x *FrostFS) HeadObject(ctx context.Context, prm frostfs.PrmObjectHead) (*object.Object, error) {
 	var addr oid.Address
 	addr.SetContainer(prm.Container)
 	addr.SetObject(prm.Object)
@@ -287,7 +287,7 @@ func (x *FrostFS) HeadObject(ctx context.Context, prm layer.PrmObjectHead) (*obj
 }
 
 // GetObject implements layer.FrostFS interface method.
-func (x *FrostFS) GetObject(ctx context.Context, prm layer.PrmObjectGet) (*layer.Object, error) {
+func (x *FrostFS) GetObject(ctx context.Context, prm frostfs.PrmObjectGet) (*frostfs.Object, error) {
 	var addr oid.Address
 	addr.SetContainer(prm.Container)
 	addr.SetObject(prm.Object)
@@ -306,14 +306,14 @@ func (x *FrostFS) GetObject(ctx context.Context, prm layer.PrmObjectGet) (*layer
 		return nil, handleObjectError("init full object reading via connection pool", err)
 	}
 
-	return &layer.Object{
+	return &frostfs.Object{
 		Header:  res.Header,
 		Payload: res.Payload,
 	}, nil
 }
 
 // RangeObject implements layer.FrostFS interface method.
-func (x *FrostFS) RangeObject(ctx context.Context, prm layer.PrmObjectRange) (io.ReadCloser, error) {
+func (x *FrostFS) RangeObject(ctx context.Context, prm frostfs.PrmObjectRange) (io.ReadCloser, error) {
 	var addr oid.Address
 	addr.SetContainer(prm.Container)
 	addr.SetObject(prm.Object)
@@ -338,7 +338,7 @@ func (x *FrostFS) RangeObject(ctx context.Context, prm layer.PrmObjectRange) (io
 }
 
 // DeleteObject implements layer.FrostFS interface method.
-func (x *FrostFS) DeleteObject(ctx context.Context, prm layer.PrmObjectDelete) error {
+func (x *FrostFS) DeleteObject(ctx context.Context, prm frostfs.PrmObjectDelete) error {
 	var addr oid.Address
 	addr.SetContainer(prm.Container)
 	addr.SetObject(prm.Object)
@@ -357,7 +357,7 @@ func (x *FrostFS) DeleteObject(ctx context.Context, prm layer.PrmObjectDelete) e
 }
 
 // SearchObjects implements layer.FrostFS interface method.
-func (x *FrostFS) SearchObjects(ctx context.Context, prm layer.PrmObjectSearch) ([]oid.ID, error) {
+func (x *FrostFS) SearchObjects(ctx context.Context, prm frostfs.PrmObjectSearch) ([]oid.ID, error) {
 	filters := object.NewSearchFilters()
 	filters.AddRootFilter()
 
@@ -403,7 +403,7 @@ func (x *FrostFS) NetworkInfo(ctx context.Context) (netmap.NetworkInfo, error) {
 	return ni, nil
 }
 
-func (x *FrostFS) PatchObject(ctx context.Context, prm layer.PrmObjectPatch) (oid.ID, error) {
+func (x *FrostFS) PatchObject(ctx context.Context, prm frostfs.PrmObjectPatch) (oid.ID, error) {
 	var addr oid.Address
 	addr.SetContainer(prm.Container)
 	addr.SetObject(prm.Object)
@@ -467,11 +467,11 @@ func handleObjectError(msg string, err error) error {
 	}
 
 	if reason, ok := errorsFrost.IsErrObjectAccessDenied(err); ok {
-		return fmt.Errorf("%s: %w: %s", msg, layer.ErrAccessDenied, reason)
+		return fmt.Errorf("%s: %w: %s", msg, frostfs.ErrAccessDenied, reason)
 	}
 
 	if errorsFrost.IsTimeoutError(err) {
-		return fmt.Errorf("%s: %w: %s", msg, layer.ErrGatewayTimeout, err.Error())
+		return fmt.Errorf("%s: %w: %s", msg, frostfs.ErrGatewayTimeout, err.Error())
 	}
 
 	return fmt.Errorf("%s: %w", msg, err)
diff --git a/internal/frostfs/frostfs_test.go b/internal/frostfs/frostfs_test.go
index a3b9bf22..137832a7 100644
--- a/internal/frostfs/frostfs_test.go
+++ b/internal/frostfs/frostfs_test.go
@@ -7,7 +7,7 @@ import (
 	"testing"
 	"time"
 
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
 	errorsFrost "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/errors"
 	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	"github.com/stretchr/testify/require"
@@ -23,10 +23,10 @@ func TestErrorChecking(t *testing.T) {
 	var wrappedError error
 
 	if fetchedReason, ok := errorsFrost.IsErrObjectAccessDenied(err); ok {
-		wrappedError = fmt.Errorf("%w: %s", layer.ErrAccessDenied, fetchedReason)
+		wrappedError = fmt.Errorf("%w: %s", frostfs.ErrAccessDenied, fetchedReason)
 	}
 
-	require.ErrorIs(t, wrappedError, layer.ErrAccessDenied)
+	require.ErrorIs(t, wrappedError, frostfs.ErrAccessDenied)
 	require.Contains(t, wrappedError.Error(), reason)
 }
 
diff --git a/pkg/service/tree/tree.go b/pkg/service/tree/tree.go
index bd2df22d..0b095a06 100644
--- a/pkg/service/tree/tree.go
+++ b/pkg/service/tree/tree.go
@@ -12,7 +12,7 @@ import (
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
@@ -82,7 +82,7 @@ var (
 	ErrNodeAccessDenied = tree.ErrNodeAccessDenied
 
 	// ErrGatewayTimeout is returned from ServiceClient service in case of timeout error.
-	ErrGatewayTimeout = layer.ErrGatewayTimeout
+	ErrGatewayTimeout = frostfs.ErrGatewayTimeout
 
 	errNodeDoesntContainFileName = fmt.Errorf("node doesn't contain FileName")
 )