diff --git a/api/rpc/tree.go b/api/rpc/tree.go
new file mode 100644
index 0000000..ee27aac
--- /dev/null
+++ b/api/rpc/tree.go
@@ -0,0 +1,173 @@
+package rpc
+
+import (
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/rpc/client"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/rpc/common"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/tree"
+)
+
+const serviceTree = "tree.TreeService"
+
+const (
+	rpcTreeAdd           = "Add"
+	rpcTreeAddByPath     = "AddByPath"
+	rpcTreeRemove        = "Remove"
+	rpcTreeMove          = "Move"
+	rpcTreeGetNodeByPath = "GetNodeByPath"
+	rpcTreeGetSubTree    = "GetSubTree"
+	rpcTreeList          = "TreeList"
+	rpcTreeApply         = "Apply"
+	rpcTreeGetOpLog      = "GetOpLog"
+	rpcTreeHealthcheck   = "Healthcheck"
+)
+
+func Add(
+	cli *client.Client,
+	req *tree.AddRequest,
+	opts ...client.CallOption,
+) (*tree.AddResponse, error) {
+	resp := new(tree.AddResponse)
+	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceTree, rpcTreeAdd), req, resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
+func AddByPath(
+	cli *client.Client,
+	req *tree.AddByPathRequest,
+	opts ...client.CallOption,
+) (*tree.AddByPathResponse, error) {
+	resp := new(tree.AddByPathResponse)
+	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceTree, rpcTreeAddByPath), req, resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
+func Remove(cli *client.Client,
+	req *tree.RemoveRequest,
+	opts ...client.CallOption,
+) (*tree.RemoveResponse, error) {
+	resp := new(tree.RemoveResponse)
+	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceTree, rpcTreeRemove), req, resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
+func Move(cli *client.Client,
+	req *tree.MoveRequest,
+	opts ...client.CallOption,
+) (*tree.MoveResponse, error) {
+	resp := new(tree.MoveResponse)
+	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceTree, rpcTreeMove), req, resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
+func GetNodeByPath(cli *client.Client,
+	req *tree.GetNodeByPathRequest,
+	opts ...client.CallOption,
+) (*tree.GetNodeByPathResponse, error) {
+	resp := new(tree.GetNodeByPathResponse)
+	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceTree, rpcTreeGetNodeByPath), req, resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
+type GetSubTreeResponseReader struct {
+	r client.MessageReader
+}
+
+// Read reads response from the stream.
+//
+// Returns io.EOF of streaming is finished.
+func (r *GetSubTreeResponseReader) Read(resp *tree.GetSubTreeResponse) error {
+	return r.r.ReadMessage(resp)
+}
+
+func GetSubTree(cli *client.Client,
+	req *tree.GetSubTreeRequest,
+	opts ...client.CallOption) (*GetSubTreeResponseReader, error) {
+	wc, err := client.OpenServerStream(cli, common.CallMethodInfoServerStream(serviceTree, rpcTreeGetSubTree), req, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return &GetSubTreeResponseReader{
+		r: wc,
+	}, nil
+}
+
+func TreeList(cli *client.Client,
+	req *tree.ListRequest,
+	opts ...client.CallOption) (*tree.ListResponse, error) {
+	resp := new(tree.ListResponse)
+	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceTree, rpcTreeList), req, resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
+func Apply(cli *client.Client,
+	req *tree.ApplyRequest,
+	opts ...client.CallOption) (*tree.ApplyResponse, error) {
+	resp := new(tree.ApplyResponse)
+	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceTree, rpcTreeApply), req, resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
+type TreeServiceGetOpLogResponseReader struct {
+	r client.MessageReader
+}
+
+// Read reads response from the stream.
+//
+// Returns io.EOF of streaming is finished.
+func (r *TreeServiceGetOpLogResponseReader) Read(resp *tree.GetOpLogResponse) error {
+	return r.r.ReadMessage(resp)
+}
+
+func GetOpLog(cli *client.Client,
+	req *tree.GetOpLogRequest,
+	opts ...client.CallOption) (*TreeServiceGetOpLogResponseReader, error) {
+	wc, err := client.OpenServerStream(cli, common.CallMethodInfoServerStream(serviceTree, rpcTreeGetOpLog), req, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return &TreeServiceGetOpLogResponseReader{
+		r: wc,
+	}, nil
+}
+
+func Healthcheck(cli *client.Client,
+	req *tree.HealthcheckRequest,
+	opts ...client.CallOption) (*tree.HealthcheckResponse, error) {
+	resp := new(tree.HealthcheckResponse)
+	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceTree, rpcTreeHealthcheck), req, resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
diff --git a/api/tree/convert.go b/api/tree/convert.go
new file mode 100644
index 0000000..051c9cb
--- /dev/null
+++ b/api/tree/convert.go
@@ -0,0 +1,1590 @@
+package tree
+
+import (
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/rpc/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/rpc/message"
+	tree "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool/tree/service"
+)
+
+func metaToGRPC(m []*KeyValue) (res []*tree.KeyValue) {
+	if m != nil {
+		res = make([]*tree.KeyValue, 0, len(m))
+
+		for i := range m {
+			res = append(res, m[i].ToGRPCMessage().(*tree.KeyValue))
+		}
+	}
+
+	return
+}
+
+func metaFromGRPC(m []*tree.KeyValue) (res []*KeyValue, err error) {
+	if m != nil {
+		res = make([]*KeyValue, len(m))
+
+		for i := range m {
+			res[i] = new(KeyValue)
+			err = res[i].FromGRPCMessage(m[i])
+			if err != nil {
+				return
+			}
+		}
+	}
+
+	return
+}
+
+func (r *AddResponse) ToGRPCMessage() grpc.Message {
+	var m *tree.AddResponse
+
+	if r != nil {
+		m = new(tree.AddResponse)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.AddResponse_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *AddResponse) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.AddResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(AddResponseBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+	}
+
+	return err
+}
+
+func (r *AddResponseBody) ToGRPCMessage() grpc.Message {
+	var m *tree.AddResponse_Body
+
+	if r != nil {
+		m = new(tree.AddResponse_Body)
+		m.NodeId = r.NodeID
+	}
+
+	return m
+}
+
+func (r *AddResponseBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.AddResponse_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	r.NodeID = v.GetNodeId()
+
+	return nil
+}
+
+func (r *AddByPathRequest) ToGRPCMessage() grpc.Message {
+	var m *tree.AddByPathRequest
+
+	if r != nil {
+		m = new(tree.AddByPathRequest)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.AddByPathRequest_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *AddByPathRequest) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.AddByPathRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(AddByPathRequestBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *AddByPathRequestBody) ToGRPCMessage() grpc.Message {
+	var m *tree.AddByPathRequest_Body
+
+	if r != nil {
+		m = new(tree.AddByPathRequest_Body)
+		m.ContainerId = r.ContainerID
+		m.Path = r.Path
+		m.BearerToken = r.BearerToken
+		m.PathAttribute = r.PathAttribute
+		m.TreeId = r.TreeID
+		m.Meta = metaToGRPC(r.Meta)
+	}
+
+	return m
+}
+
+func (r *AddByPathRequestBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.AddByPathRequest_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	meta := v.GetMeta()
+	if meta == nil {
+		r.Meta = nil
+	} else {
+		r.Meta, err = metaFromGRPC(meta)
+		if err != nil {
+			return err
+		}
+	}
+
+	r.ContainerID = v.GetContainerId()
+	r.BearerToken = v.GetBearerToken()
+	r.Path = v.GetPath()
+	r.PathAttribute = v.GetPathAttribute()
+	r.TreeID = v.GetTreeId()
+
+	return err
+}
+
+func (r *MoveResponse) ToGRPCMessage() grpc.Message {
+	var m *tree.MoveResponse
+
+	if r != nil {
+		m = new(tree.MoveResponse)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.MoveResponse_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *MoveResponse) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.MoveResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(MoveResponseBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+	}
+
+	return err
+}
+
+func (r *MoveResponseBody) ToGRPCMessage() grpc.Message {
+	return new(tree.MoveResponse_Body)
+}
+
+func (r *MoveResponseBody) FromGRPCMessage(grpc.Message) error {
+	return nil
+}
+
+func (r *MoveRequest) ToGRPCMessage() grpc.Message {
+	var m *tree.MoveRequest
+
+	if r != nil {
+		m = new(tree.MoveRequest)
+		m.Body = r.Body.ToGRPCMessage().(*tree.MoveRequest_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *MoveRequest) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.MoveRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(MoveRequestBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+
+		err = r.signature.FromGRPCMessage(sig)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (r *MoveRequestBody) ToGRPCMessage() grpc.Message {
+	var m *tree.MoveRequest_Body
+
+	if r != nil {
+		m = new(tree.MoveRequest_Body)
+
+		m.ContainerId = r.ContainerID
+		m.Meta = metaToGRPC(r.Meta)
+		m.TreeId = r.TreeID
+		m.ParentId = r.ParentID
+		m.BearerToken = r.BearerToken
+		m.NodeId = r.NodeID
+	}
+
+	return m
+}
+
+func (r *MoveRequestBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.MoveRequest_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+	r.Meta, err = metaFromGRPC(v.GetMeta())
+	if err != nil {
+		return err
+	}
+	r.TreeID = v.GetTreeId()
+	r.NodeID = v.GetNodeId()
+	r.ContainerID = v.GetContainerId()
+	r.ParentID = v.GetParentId()
+	r.BearerToken = v.GetBearerToken()
+
+	return nil
+}
+
+func (r *RemoveRequest) ToGRPCMessage() grpc.Message {
+	var m *tree.RemoveRequest
+
+	if r != nil {
+		m = new(tree.RemoveRequest)
+		m.Body = r.Body.ToGRPCMessage().(*tree.RemoveRequest_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *RemoveRequest) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.RemoveRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(RemoveRequestBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+	}
+
+	return err
+}
+
+func (r *RemoveRequestBody) ToGRPCMessage() grpc.Message {
+	var m *tree.RemoveRequest_Body
+
+	if r != nil {
+		m = new(tree.RemoveRequest_Body)
+		m.NodeId = r.NodeID
+		m.TreeId = r.TreeID
+		m.BearerToken = r.BearerToken
+		m.ContainerId = r.ContainerID
+	}
+
+	return m
+}
+
+func (r *RemoveRequestBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.RemoveRequest_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	r.NodeID = v.GetNodeId()
+	r.TreeID = v.GetTreeId()
+	r.ContainerID = v.GetContainerId()
+	r.BearerToken = v.GetBearerToken()
+
+	return nil
+}
+
+func (r *AddByPathResponse) ToGRPCMessage() grpc.Message {
+	var m *tree.AddByPathResponse
+
+	if r != nil {
+		m = new(tree.AddByPathResponse)
+		m.Body = r.Body.ToGRPCMessage().(*tree.AddByPathResponse_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *AddByPathResponse) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.AddByPathResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(AddByPathResponseBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+	}
+
+	return err
+}
+
+func (r *AddByPathResponseBody) ToGRPCMessage() grpc.Message {
+	var m *tree.AddByPathResponse_Body
+
+	if r != nil {
+		m = new(tree.AddByPathResponse_Body)
+
+		m.ParentId = r.ParentID
+		m.Nodes = r.Nodes
+	}
+
+	return m
+}
+
+func (r *AddByPathResponseBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.AddByPathResponse_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+	r.Nodes = v.GetNodes()
+	r.ParentID = v.GetParentId()
+
+	return nil
+}
+
+func (r *AddRequest) ToGRPCMessage() grpc.Message {
+	var m *tree.AddRequest
+
+	if r != nil {
+		m = new(tree.AddRequest)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.AddRequest_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *AddRequest) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.AddRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(AddRequestBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+	}
+
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *AddRequestBody) ToGRPCMessage() grpc.Message {
+	var m *tree.AddRequest_Body
+
+	if r != nil {
+		m = new(tree.AddRequest_Body)
+
+		m.Meta = metaToGRPC(r.Meta)
+		m.TreeId = r.TreeID
+		m.ParentId = r.ParentID
+		m.ContainerId = r.ContainerID
+		m.BearerToken = r.BearerToken
+	}
+
+	return m
+}
+
+func (r *AddRequestBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.AddRequest_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	r.Meta, err = metaFromGRPC(v.GetMeta())
+	if err != nil {
+		return err
+	}
+	r.BearerToken = v.GetBearerToken()
+	r.TreeID = v.GetTreeId()
+	r.ContainerID = v.GetContainerId()
+	r.ParentID = v.GetParentId()
+
+	return err
+}
+
+func (r *RemoveResponse) ToGRPCMessage() grpc.Message {
+	var m *tree.RemoveResponse
+
+	if r != nil {
+		m = new(tree.RemoveResponse)
+		m.Body = r.Body.ToGRPCMessage().(*tree.RemoveResponse_Body)
+	}
+
+	return m
+}
+
+func (r *RemoveResponse) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.RemoveResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(RemoveResponseBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+	}
+
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *RemoveResponseBody) ToGRPCMessage() grpc.Message {
+	return new(tree.RemoveResponse_Body)
+}
+
+func (r *RemoveResponseBody) FromGRPCMessage(grpc.Message) error {
+	return nil
+}
+
+func (r *GetNodeByPathRequest) ToGRPCMessage() grpc.Message {
+	var m *tree.GetNodeByPathRequest
+
+	if r != nil {
+		m = new(tree.GetNodeByPathRequest)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.GetNodeByPathRequest_Body)
+		m.Signature = r.signature.ToGRPCMessage().(*tree.Signature)
+	}
+
+	return m
+}
+
+func (r *GetNodeByPathRequest) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetNodeByPathRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(GetNodeByPathRequestBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+	}
+
+	return err
+}
+
+func (r *GetNodeByPathRequestBody) ToGRPCMessage() grpc.Message {
+	var m *tree.GetNodeByPathRequest_Body
+
+	if r != nil {
+		m = new(tree.GetNodeByPathRequest_Body)
+
+		m.TreeId = r.TreeID
+		m.Path = r.Path
+		m.BearerToken = r.BearerToken
+		m.ContainerId = r.ContainerID
+		m.Attributes = r.Attributes
+		m.PathAttribute = r.PathAttribute
+		m.AllAttributes = r.AllAttributes
+		m.LatestOnly = r.LatestOnly
+	}
+
+	return m
+}
+
+func (r *GetNodeByPathRequestBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetNodeByPathRequest_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	r.TreeID = v.GetTreeId()
+	r.Path = v.GetPath()
+	r.Attributes = v.GetAttributes()
+	r.LatestOnly = v.GetLatestOnly()
+	r.AllAttributes = v.GetAllAttributes()
+	r.PathAttribute = v.GetPathAttribute()
+	r.ContainerID = v.GetContainerId()
+	r.BearerToken = v.GetBearerToken()
+
+	return nil
+}
+
+func (r *GetNodeByPathResponse) ToGRPCMessage() grpc.Message {
+	var m *tree.GetNodeByPathResponse
+
+	if r != nil {
+		m = new(tree.GetNodeByPathResponse)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.GetNodeByPathResponse_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *GetNodeByPathResponse) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetNodeByPathResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(GetNodeByPathResponseBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *GetNodeByPathResponseBody) ToGRPCMessage() grpc.Message {
+	var m *tree.GetNodeByPathResponse_Body
+
+	if r != nil {
+		m = new(tree.GetNodeByPathResponse_Body)
+		m.Nodes = GetNodeByPathInfoToGRPC(r.Nodes)
+	}
+
+	return m
+}
+
+func (r *GetNodeByPathResponseBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetNodeByPathResponse_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	r.Nodes, err = GetNodeByPathInfoFromGRPC(v.GetNodes())
+
+	return err
+}
+
+func GetNodeByPathInfoToGRPC(m []GetNodeByPathResponseInfo) (res []*tree.GetNodeByPathResponse_Info) {
+	if m != nil {
+		res = make([]*tree.GetNodeByPathResponse_Info, 0, len(m))
+
+		for i := range m {
+			res = append(res, m[i].ToGRPCMessage().(*tree.GetNodeByPathResponse_Info))
+		}
+	}
+
+	return
+}
+
+func GetNodeByPathInfoFromGRPC(m []*tree.GetNodeByPathResponse_Info) (res []GetNodeByPathResponseInfo, err error) {
+	if m != nil {
+		res = make([]GetNodeByPathResponseInfo, len(m))
+
+		for i := range m {
+			err = res[i].FromGRPCMessage(m[i])
+			if err != nil {
+				return
+			}
+		}
+	}
+
+	return
+}
+
+func (r *GetNodeByPathResponseInfo) ToGRPCMessage() grpc.Message {
+	var m *tree.GetNodeByPathResponse_Info
+
+	if r != nil {
+		m = new(tree.GetNodeByPathResponse_Info)
+
+		m.Meta = metaToGRPC(r.Meta)
+		m.NodeId = r.NodeID
+		m.Timestamp = r.Timestamp
+		m.ParentId = r.ParentID
+	}
+
+	return m
+}
+
+func (r *GetNodeByPathResponseInfo) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetNodeByPathResponse_Info)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	r.Meta, err = metaFromGRPC(v.GetMeta())
+	if err != nil {
+		return err
+	}
+	r.Timestamp = v.GetTimestamp()
+	r.NodeID = v.GetNodeId()
+	r.ParentID = v.GetParentId()
+
+	return err
+}
+
+func (r *ListRequest) ToGRPCMessage() grpc.Message {
+	var m *tree.TreeListRequest
+
+	if r != nil {
+		m = new(tree.TreeListRequest)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.TreeListRequest_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *ListRequest) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.TreeListRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(ListRequestBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *ListRequestBody) ToGRPCMessage() grpc.Message {
+	var m *tree.TreeListRequest_Body
+
+	if r != nil {
+		m = new(tree.TreeListRequest_Body)
+
+		m.ContainerId = r.ContainerID
+	}
+
+	return m
+}
+
+func (r *ListRequestBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.TreeListRequest_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+	r.ContainerID = v.GetContainerId()
+
+	return nil
+}
+
+func (r *ListResponse) ToGRPCMessage() grpc.Message {
+	var m *tree.TreeListResponse
+
+	if r != nil {
+		m = new(tree.TreeListResponse)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.TreeListResponse_Body)
+		m.Signature = r.signature.ToGRPCMessage().(*tree.Signature)
+	}
+
+	return m
+}
+
+func (r *ListResponse) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.TreeListResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(ListResponseBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *ListResponseBody) ToGRPCMessage() grpc.Message {
+	var m *tree.TreeListResponse_Body
+
+	if r != nil {
+		m = new(tree.TreeListResponse_Body)
+		m.Ids = r.IDs
+	}
+
+	return m
+}
+
+func (r *ListResponseBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.TreeListResponse_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+	r.IDs = v.GetIds()
+
+	return nil
+}
+
+func (r *ApplyRequest) ToGRPCMessage() grpc.Message {
+	var m *tree.ApplyRequest
+
+	if r != nil {
+		m = new(tree.ApplyRequest)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.ApplyRequest_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *ApplyRequest) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.ApplyRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(ApplyRequestBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *ApplyRequestBody) ToGRPCMessage() grpc.Message {
+	var m *tree.ApplyRequest_Body
+
+	if r != nil {
+		m = new(tree.ApplyRequest_Body)
+
+		m.TreeId = r.TreeID
+		m.ContainerId = r.ContainerID
+		m.Operation = r.Operation.ToGRPCMessage().(*tree.LogMove)
+	}
+
+	return m
+}
+
+func (r *ApplyRequestBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.ApplyRequest_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+	r.TreeID = v.GetTreeId()
+	r.ContainerID = v.GetContainerId()
+	op := v.GetOperation()
+	if op == nil {
+		r.Operation = nil
+	} else {
+		if r.Operation == nil {
+			r.Operation = new(LogMove)
+		}
+		err = r.Operation.FromGRPCMessage(op)
+	}
+
+	return err
+}
+
+func (r *ApplyResponse) ToGRPCMessage() grpc.Message {
+	var m *tree.ApplyResponse
+
+	if r != nil {
+		m = new(tree.ApplyResponse)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.ApplyResponse_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *ApplyResponse) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.ApplyResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(ApplyResponseBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *ApplyResponseBody) ToGRPCMessage() grpc.Message {
+	return new(tree.ApplyResponse_Body)
+}
+
+func (r *ApplyResponseBody) FromGRPCMessage(grpc.Message) error {
+	return nil
+}
+
+func (r *HealthcheckRequest) ToGRPCMessage() grpc.Message {
+	var m *tree.HealthcheckRequest
+
+	if r != nil {
+		m = new(tree.HealthcheckRequest)
+
+		m.Body = r.GetBody().ToGRPCMessage().(*tree.HealthcheckRequest_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *HealthcheckRequest) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.HealthcheckRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.SetBody(nil)
+	} else {
+		if r.GetBody() == nil {
+			r.SetBody(new(HealthcheckRequestBody))
+		}
+
+		err = r.GetBody().FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *HealthcheckRequestBody) ToGRPCMessage() grpc.Message {
+	return new(tree.HealthcheckRequest_Body)
+}
+
+func (r *HealthcheckRequestBody) FromGRPCMessage(grpc.Message) error {
+	return nil
+}
+
+func (r *HealthcheckResponse) ToGRPCMessage() grpc.Message {
+	var m *tree.HealthcheckResponse
+
+	if r != nil {
+		m = new(tree.HealthcheckResponse)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.HealthcheckResponse_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *HealthcheckResponse) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.HealthcheckResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(HealthcheckResponseBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *HealthcheckResponseBody) ToGRPCMessage() grpc.Message {
+	return new(tree.HealthcheckResponse_Body)
+}
+
+func (r *HealthcheckResponseBody) FromGRPCMessage(grpc.Message) error {
+	return nil
+}
+
+func (r *GetSubTreeResponse) ToGRPCMessage() grpc.Message {
+	var m *tree.GetSubTreeResponse
+
+	if r != nil {
+		m = new(tree.GetSubTreeResponse)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.GetSubTreeResponse_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *GetSubTreeResponse) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetSubTreeResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(GetSubTreeResponseBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *GetOpLogRequest) ToGRPCMessage() grpc.Message {
+	var m *tree.GetOpLogRequest
+
+	if r != nil {
+		m = new(tree.GetOpLogRequest)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.GetOpLogRequest_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *GetOpLogRequest) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetOpLogRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(GetOpLogRequestBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *GetOpLogRequestBody) ToGRPCMessage() grpc.Message {
+	var m *tree.GetOpLogRequest_Body
+
+	if r != nil {
+		m = new(tree.GetOpLogRequest_Body)
+
+		m.TreeId = r.TreeID
+		m.Count = r.Count
+		m.ContainerId = r.ContainerID
+		m.Height = r.Height
+	}
+
+	return m
+}
+
+func (r *GetOpLogRequestBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetOpLogRequest_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	r.Count = v.GetCount()
+	r.ContainerID = v.GetContainerId()
+	r.Height = v.GetHeight()
+	r.TreeID = v.GetTreeId()
+
+	return err
+}
+
+func (r *GetOpLogResponse) ToGRPCMessage() grpc.Message {
+	var m *tree.GetOpLogResponse
+
+	if r != nil {
+		m = new(tree.GetOpLogResponse)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.GetOpLogResponse_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *GetOpLogResponse) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetOpLogResponse)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(GetOpLogResponseBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *GetOpLogResponseBody) ToGRPCMessage() grpc.Message {
+	var m *tree.GetOpLogResponse_Body
+
+	if r != nil {
+		m = new(tree.GetOpLogResponse_Body)
+
+		m.Operation = r.Operation.ToGRPCMessage().(*tree.LogMove)
+	}
+
+	return m
+}
+
+func (r *GetOpLogResponseBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetOpLogResponse_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	oper := v.GetOperation()
+	if oper == nil {
+		r.Operation = nil
+	} else {
+		if r.Operation == nil {
+			r.Operation = new(LogMove)
+		}
+
+		err = r.Operation.FromGRPCMessage(oper)
+	}
+
+	return err
+}
+
+func (s *Signature) ToGRPCMessage() grpc.Message {
+	var m *tree.Signature
+
+	if s != nil {
+		m = new(tree.Signature)
+
+		m.Sign = s.Sign
+		m.Key = s.Key
+	}
+
+	return m
+}
+
+func (s *Signature) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.Signature)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	s.Sign = v.GetSign()
+	s.Key = v.GetKey()
+
+	return nil
+}
+
+func (k *KeyValue) ToGRPCMessage() grpc.Message {
+	var m *tree.KeyValue
+
+	if k != nil {
+		m = new(tree.KeyValue)
+
+		m.Key = k.Key
+		m.Value = k.Value
+	}
+
+	return m
+}
+
+func (k *KeyValue) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.KeyValue)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+	k.Key = v.GetKey()
+	k.Value = v.GetValue()
+
+	return nil
+}
+
+func (g *LogMove) ToGRPCMessage() grpc.Message {
+	var m *tree.LogMove
+
+	if g != nil {
+		m = new(tree.LogMove)
+
+		m.Meta = g.Meta
+		m.ParentId = g.ParentID
+		m.ChildId = g.ChildID
+	}
+
+	return m
+}
+
+func (g *LogMove) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.LogMove)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+	g.Meta = v.GetMeta()
+	g.ParentID = v.GetParentId()
+	g.ChildID = v.GetChildId()
+
+	return nil
+}
+
+func (r *GetSubTreeRequest) ToGRPCMessage() grpc.Message {
+	var m *tree.GetSubTreeRequest
+
+	if r != nil {
+		m = new(tree.GetSubTreeRequest)
+
+		m.Body = r.Body.ToGRPCMessage().(*tree.GetSubTreeRequest_Body)
+		m.SetSignature(r.signature.ToGRPCMessage().(*tree.Signature))
+	}
+
+	return m
+}
+
+func (r *GetSubTreeRequest) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetSubTreeRequest)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	var err error
+
+	body := v.GetBody()
+	if body == nil {
+		r.Body = nil
+	} else {
+		if r.Body == nil {
+			r.Body = new(GetSubTreeRequestBody)
+		}
+
+		err = r.Body.FromGRPCMessage(body)
+		if err != nil {
+			return err
+		}
+	}
+
+	sig := v.GetSignature()
+	if sig == nil {
+		r.signature = nil
+	} else {
+		if r.signature == nil {
+			r.signature = new(Signature)
+		}
+		err = r.signature.FromGRPCMessage(sig)
+	}
+
+	return err
+}
+
+func (r *GetSubTreeRequestBody) ToGRPCMessage() grpc.Message {
+	var m *tree.GetSubTreeRequest_Body
+
+	if r != nil {
+		m = new(tree.GetSubTreeRequest_Body)
+
+		m.TreeId = r.TreeID
+		m.BearerToken = r.BearerToken
+		m.Depth = r.Depth
+		m.RootId = r.RootID
+		m.ContainerId = r.ContainerID
+		m.OrderBy = r.OrderBy.ToGRPCMessage().(*tree.GetSubTreeRequest_Body_Order)
+	}
+
+	return m
+}
+
+func (r *GetSubTreeRequestBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetSubTreeRequest_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	r.RootID = v.GetRootId()
+	r.Depth = v.GetDepth()
+	r.ContainerID = v.GetContainerId()
+	r.BearerToken = v.GetBearerToken()
+	r.TreeID = v.GetTreeId()
+
+	var err error
+	order := v.GetOrderBy()
+	if order == nil {
+		r.OrderBy = nil
+	} else {
+		if r.OrderBy == nil {
+			r.OrderBy = new(GetSubTreeRequestBodyOrder)
+		}
+
+		err = r.OrderBy.FromGRPCMessage(order)
+		if err != nil {
+			return err
+		}
+	}
+
+	return err
+}
+func (r *GetSubTreeRequestBodyOrder) ToGRPCMessage() grpc.Message {
+	var m *tree.GetSubTreeRequest_Body_Order
+
+	if r != nil {
+		m = new(tree.GetSubTreeRequest_Body_Order)
+
+		m.Direction = tree.GetSubTreeRequest_Body_Order_Direction(r.Direction)
+	}
+
+	return m
+}
+
+func (r *GetSubTreeRequestBodyOrder) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetSubTreeRequest_Body_Order)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+
+	r.Direction = GetSubTreeRequestBodyOrderDirection(v.GetDirection())
+
+	return nil
+}
+
+func (r *GetSubTreeResponseBody) ToGRPCMessage() grpc.Message {
+	var m *tree.GetSubTreeResponse_Body
+
+	if r != nil {
+		m = new(tree.GetSubTreeResponse_Body)
+
+		m.Meta = metaToGRPC(r.Meta)
+		m.ParentId = r.ParentID
+		m.NodeId = r.NodeID
+		m.Timestamp = r.Timestamp
+	}
+
+	return m
+}
+
+func (r *GetSubTreeResponseBody) FromGRPCMessage(m grpc.Message) error {
+	v, ok := m.(*tree.GetSubTreeResponse_Body)
+	if !ok {
+		return message.NewUnexpectedMessageType(m, v)
+	}
+	var err error
+
+	r.NodeID = v.GetNodeId()
+	r.Timestamp = v.GetTimestamp()
+	r.ParentID = v.GetParentId()
+	r.Meta, err = metaFromGRPC(v.GetMeta())
+
+	return err
+}
diff --git a/api/tree/types.go b/api/tree/types.go
new file mode 100644
index 0000000..dabe285
--- /dev/null
+++ b/api/tree/types.go
@@ -0,0 +1,393 @@
+package tree
+
+import (
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/session"
+	tree "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool/tree/service"
+)
+
+type AddRequest struct {
+	Body      *AddRequestBody
+	signature *Signature
+}
+
+func (r *AddRequest) SignedDataSize() int {
+	return r.Body.ToGRPCMessage().(*tree.AddRequest_Body).StableSize()
+}
+
+func (r *AddRequest) ReadSignedData(buf []byte) ([]byte, error) {
+	return r.Body.ToGRPCMessage().(*tree.AddRequest_Body).StableMarshal(buf), nil
+}
+
+func (r *AddRequest) GetSignature() *tree.Signature {
+	return r.signature.ToGRPCMessage().(*tree.Signature)
+}
+
+func (r *AddRequest) SetSignature(signature *tree.Signature) error {
+	if r.signature == nil {
+		r.signature = new(Signature)
+	}
+
+	return r.signature.FromGRPCMessage(signature)
+}
+
+type AddRequestBody struct {
+	ContainerID []byte
+	BearerToken []byte
+	TreeID      string
+	ParentID    uint64
+	Meta        []*KeyValue
+}
+
+type AddResponse struct {
+	Body      *AddResponseBody
+	signature *Signature
+}
+
+type AddResponseBody struct {
+	NodeID uint64
+}
+
+type AddByPathRequest struct {
+	Body      *AddByPathRequestBody
+	signature *Signature
+}
+
+func (r *AddByPathRequest) SignedDataSize() int {
+	return r.Body.ToGRPCMessage().(*tree.AddByPathRequest_Body).StableSize()
+}
+
+func (r *AddByPathRequest) ReadSignedData(bytes []byte) ([]byte, error) {
+	return r.Body.ToGRPCMessage().(*tree.AddByPathRequest_Body).StableMarshal(bytes), nil
+}
+
+func (r *AddByPathRequest) GetSignature() *tree.Signature {
+	return r.signature.ToGRPCMessage().(*tree.Signature)
+}
+
+func (r *AddByPathRequest) SetSignature(signature *tree.Signature) error {
+	if r.signature == nil {
+		r.signature = new(Signature)
+	}
+
+	return r.signature.FromGRPCMessage(signature)
+}
+
+type AddByPathRequestBody struct {
+	ContainerID   []byte
+	TreeID        string
+	PathAttribute string
+	Path          []string
+	Meta          []*KeyValue
+	BearerToken   []byte
+}
+
+type AddByPathResponse struct {
+	Body      *AddByPathResponseBody
+	signature *Signature
+}
+
+type AddByPathResponseBody struct {
+	Nodes    []uint64
+	ParentID uint64
+}
+
+type RemoveRequest struct {
+	Body      *RemoveRequestBody
+	signature *Signature
+}
+
+func (r *RemoveRequest) SignedDataSize() int {
+	return r.Body.ToGRPCMessage().(*tree.RemoveRequest_Body).StableSize()
+}
+
+func (r *RemoveRequest) ReadSignedData(bytes []byte) ([]byte, error) {
+	return r.Body.ToGRPCMessage().(*tree.RemoveRequest_Body).StableMarshal(bytes), nil
+}
+
+func (r *RemoveRequest) GetSignature() *tree.Signature {
+	return r.signature.ToGRPCMessage().(*tree.Signature)
+}
+
+func (r *RemoveRequest) SetSignature(signature *tree.Signature) error {
+	if r.signature == nil {
+		r.signature = new(Signature)
+	}
+
+	return r.signature.FromGRPCMessage(signature)
+}
+
+type RemoveRequestBody struct {
+	ContainerID []byte
+	TreeID      string
+	NodeID      uint64
+	BearerToken []byte
+}
+
+type RemoveResponse struct {
+	Body      *RemoveResponseBody
+	signature *Signature
+}
+
+type RemoveResponseBody struct {
+}
+
+type MoveRequest struct {
+	Body      *MoveRequestBody
+	signature *Signature
+}
+
+func (r *MoveRequest) SignedDataSize() int {
+	return r.Body.ToGRPCMessage().(*tree.MoveRequest_Body).StableSize()
+}
+
+func (r *MoveRequest) ReadSignedData(buf []byte) ([]byte, error) {
+	return r.Body.ToGRPCMessage().(*tree.MoveRequest_Body).StableMarshal(buf), nil
+}
+
+func (r *MoveRequest) GetSignature() *tree.Signature {
+	return r.signature.ToGRPCMessage().(*tree.Signature)
+}
+
+func (r *MoveRequest) SetSignature(signature *tree.Signature) error {
+	if r.signature == nil {
+		r.signature = new(Signature)
+	}
+
+	return r.signature.FromGRPCMessage(signature)
+}
+
+type MoveRequestBody struct {
+	ContainerID []byte
+	TreeID      string
+	ParentID    uint64
+	NodeID      uint64
+	Meta        []*KeyValue
+	BearerToken []byte
+}
+
+type MoveResponse struct {
+	Body      *MoveResponseBody
+	signature *Signature
+}
+
+type MoveResponseBody struct {
+}
+
+type GetNodeByPathRequest struct {
+	Body      *GetNodeByPathRequestBody
+	signature *Signature
+}
+
+func (r *GetNodeByPathRequest) SignedDataSize() int {
+	return r.Body.ToGRPCMessage().(*tree.GetNodeByPathRequest_Body).StableSize()
+}
+
+func (r *GetNodeByPathRequest) ReadSignedData(buf []byte) ([]byte, error) {
+	return r.Body.ToGRPCMessage().(*tree.GetNodeByPathRequest_Body).StableMarshal(buf), nil
+}
+
+func (r *GetNodeByPathRequest) GetSignature() *tree.Signature {
+	return r.signature.ToGRPCMessage().(*tree.Signature)
+}
+
+func (r *GetNodeByPathRequest) SetSignature(signature *tree.Signature) error {
+	if r.signature == nil {
+		r.signature = new(Signature)
+	}
+	return r.signature.FromGRPCMessage(signature)
+}
+
+type GetNodeByPathRequestBody struct {
+	ContainerID   []byte
+	TreeID        string
+	PathAttribute string
+	Path          []string
+	Attributes    []string
+	LatestOnly    bool
+	AllAttributes bool
+	BearerToken   []byte
+}
+
+type GetNodeByPathResponse struct {
+	Body      *GetNodeByPathResponseBody
+	signature *Signature
+}
+
+type GetNodeByPathResponseBody struct {
+	Nodes []GetNodeByPathResponseInfo
+}
+
+type GetNodeByPathResponseInfo struct {
+	NodeID    uint64
+	Timestamp uint64
+	Meta      []*KeyValue
+	ParentID  uint64
+}
+
+type ListRequest struct {
+	Body      *ListRequestBody
+	signature *Signature
+}
+
+type ListRequestBody struct {
+	ContainerID []byte
+}
+
+type ListResponse struct {
+	Body      *ListResponseBody
+	signature *Signature
+}
+
+type ListResponseBody struct {
+	IDs []string
+}
+
+type GetSubTreeRequest struct {
+	Body *GetSubTreeRequestBody
+
+	signature *Signature
+}
+
+func (r *GetSubTreeRequest) SignedDataSize() int {
+	return r.Body.ToGRPCMessage().(*tree.GetSubTreeRequest_Body).StableSize()
+}
+
+func (r *GetSubTreeRequest) ReadSignedData(buf []byte) ([]byte, error) {
+	return r.Body.ToGRPCMessage().(*tree.GetSubTreeRequest_Body).StableMarshal(buf), nil
+}
+
+func (r *GetSubTreeRequest) GetSignature() *tree.Signature {
+	return r.signature.ToGRPCMessage().(*tree.Signature)
+}
+
+func (r *GetSubTreeRequest) SetSignature(signature *tree.Signature) error {
+	if r.signature == nil {
+		r.signature = new(Signature)
+	}
+
+	return r.signature.FromGRPCMessage(signature)
+}
+
+type GetSubTreeRequestBody struct {
+	ContainerID []byte
+	TreeID      string
+	RootID      []uint64
+	Depth       uint32
+	BearerToken []byte
+	OrderBy     *GetSubTreeRequestBodyOrder
+}
+
+type GetSubTreeRequestBodyOrder struct {
+	Direction GetSubTreeRequestBodyOrderDirection
+}
+
+const (
+	GetSubTreeRequestBodyOrderNone = GetSubTreeRequestBodyOrderDirection(tree.GetSubTreeRequest_Body_Order_None)
+	GetSubTreeRequestBodyOrderAsc  = GetSubTreeRequestBodyOrderDirection(tree.GetSubTreeRequest_Body_Order_Asc)
+)
+
+type GetSubTreeRequestBodyOrderDirection int32
+
+type GetSubTreeResponse struct {
+	Body      *GetSubTreeResponseBody
+	signature *Signature
+}
+
+type GetSubTreeResponseBody struct {
+	NodeID    []uint64
+	ParentID  []uint64
+	Timestamp []uint64
+	Meta      []*KeyValue
+}
+
+type ApplyRequest struct {
+	Body      *ApplyRequestBody
+	signature *Signature
+}
+
+type ApplyRequestBody struct {
+	ContainerID []byte
+	TreeID      string
+	Operation   *LogMove
+}
+
+type ApplyResponse struct {
+	Body      *ApplyResponseBody
+	signature *Signature
+}
+
+type ApplyResponseBody struct {
+}
+
+type GetOpLogRequest struct {
+	Body      *GetOpLogRequestBody
+	signature *Signature
+}
+
+type GetOpLogRequestBody struct {
+	ContainerID []byte
+	TreeID      string
+	Height      uint64
+	Count       uint64
+}
+
+type GetOpLogResponse struct {
+	Body      *GetOpLogResponseBody
+	signature *Signature
+}
+
+type GetOpLogResponseBody struct {
+	Operation *LogMove
+}
+
+type HealthcheckRequest struct {
+	body      *HealthcheckRequestBody
+	signature *Signature
+
+	session.RequestHeaders
+}
+
+func (r *HealthcheckRequest) GetBody() *HealthcheckRequestBody {
+	if r != nil {
+		return r.body
+	}
+
+	return new(HealthcheckRequestBody)
+}
+
+func (r *HealthcheckRequest) SetBody(v *HealthcheckRequestBody) {
+	r.body = v
+}
+
+type HealthcheckRequestBody struct{}
+
+type HealthcheckResponse struct {
+	Body      *HealthcheckResponseBody
+	signature *Signature
+}
+
+type HealthcheckResponseBody struct{}
+
+type LogMove struct {
+	ParentID uint64
+	Meta     []byte
+	ChildID  uint64
+}
+
+type Signature struct {
+	Key  []byte
+	Sign []byte
+}
+
+type KeyValue struct {
+	Key   string
+	Value []byte
+}
+
+func (k *KeyValue) GetKey() string {
+	return k.Key
+}
+
+func (k *KeyValue) GetValue() []byte {
+	return k.Value
+}
diff --git a/pool/tree/client.go b/pool/tree/client.go
index 78a1610..73c0fc5 100644
--- a/pool/tree/client.go
+++ b/pool/tree/client.go
@@ -5,21 +5,27 @@ import (
 	"crypto/tls"
 	"errors"
 	"fmt"
+	"io"
 	"sync"
+	"time"
 
-	apiClient "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/rpc/client"
-	grpcService "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool/tree/service"
+	rpcapi "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/rpc"
+	rpcclient "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/rpc/client"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/tree"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/credentials/insecure"
 )
 
 type treeClient struct {
-	mu      sync.RWMutex
-	address string
-	opts    []grpc.DialOption
-	conn    *grpc.ClientConn
-	service grpcService.TreeServiceClient
+	mu              sync.RWMutex
+	address         string
+	opts            []grpc.DialOption
+	conn            io.Closer
+	client          *rpcclient.Client
+	nodeDialTimeout time.Duration
+	streamTimeout   time.Duration
+
 	healthy bool
 }
 
@@ -27,10 +33,12 @@ type treeClient struct {
 var ErrUnhealthyEndpoint = errors.New("unhealthy endpoint")
 
 // newTreeClient creates new tree client with auto dial.
-func newTreeClient(addr string, opts ...grpc.DialOption) *treeClient {
+func newTreeClient(addr string, opts []grpc.DialOption, dialTimeout time.Duration, streamTimeout time.Duration) *treeClient {
 	return &treeClient{
-		address: addr,
-		opts:    opts,
+		address:         addr,
+		opts:            opts,
+		nodeDialTimeout: dialTimeout,
+		streamTimeout:   streamTimeout,
 	}
 }
 
@@ -43,14 +51,16 @@ func (c *treeClient) dial(ctx context.Context) error {
 	}
 
 	var err error
-	if c.conn, c.service, err = createClient(c.address, c.opts...); err != nil {
+	c.client, err = c.createClient()
+	if err != nil {
 		return err
 	}
 
-	if _, err = c.service.Healthcheck(ctx, &grpcService.HealthcheckRequest{}); err != nil {
+	if _, err = rpcapi.Healthcheck(c.client, &tree.HealthcheckRequest{}, rpcclient.WithContext(ctx)); err != nil {
 		return fmt.Errorf("healthcheck tree service: %w", err)
 	}
 
+	c.conn = c.client.Conn()
 	c.healthy = true
 
 	return nil
@@ -61,13 +71,13 @@ func (c *treeClient) redialIfNecessary(ctx context.Context) (healthHasChanged bo
 	defer c.mu.Unlock()
 
 	if c.conn == nil {
-		if c.conn, c.service, err = createClient(c.address, c.opts...); err != nil {
+		if c.client, err = c.createClient(); err != nil {
 			return false, err
 		}
 	}
 
 	wasHealthy := c.healthy
-	if _, err = c.service.Healthcheck(ctx, &grpcService.HealthcheckRequest{}); err != nil {
+	if _, err = rpcapi.Healthcheck(c.client, &tree.HealthcheckRequest{}, rpcclient.WithContext(ctx)); err != nil {
 		c.healthy = false
 		return wasHealthy, fmt.Errorf("healthcheck tree service: %w", err)
 	}
@@ -77,10 +87,10 @@ func (c *treeClient) redialIfNecessary(ctx context.Context) (healthHasChanged bo
 	return !wasHealthy, nil
 }
 
-func createClient(addr string, clientOptions ...grpc.DialOption) (*grpc.ClientConn, grpcService.TreeServiceClient, error) {
-	host, tlsEnable, err := apiClient.ParseURI(addr)
+func (c *treeClient) createClient() (*rpcclient.Client, error) {
+	_, tlsEnable, err := rpcclient.ParseURI(c.address)
 	if err != nil {
-		return nil, nil, fmt.Errorf("parse address: %w", err)
+		return nil, fmt.Errorf("parse address: %w", err)
 	}
 
 	creds := insecure.NewCredentials()
@@ -91,17 +101,19 @@ func createClient(addr string, clientOptions ...grpc.DialOption) (*grpc.ClientCo
 	options := []grpc.DialOption{grpc.WithTransportCredentials(creds)}
 
 	// the order is matter, we want client to be able to overwrite options.
-	opts := append(options, clientOptions...)
+	opts := append(options, c.opts...)
 
-	conn, err := grpc.NewClient(host, opts...)
-	if err != nil {
-		return nil, nil, fmt.Errorf("grpc create node tree service: %w", err)
-	}
+	cli := rpcclient.New(append(
+		rpcclient.WithNetworkURIAddress(c.address, &tls.Config{}),
+		rpcclient.WithDialTimeout(c.nodeDialTimeout),
+		rpcclient.WithRWTimeout(c.streamTimeout),
+		rpcclient.WithGRPCDialOptions(opts),
+	)...)
 
-	return conn, grpcService.NewTreeServiceClient(conn), nil
+	return cli, nil
 }
 
-func (c *treeClient) serviceClient() (grpcService.TreeServiceClient, error) {
+func (c *treeClient) serviceClient() (*rpcclient.Client, error) {
 	c.mu.RLock()
 	defer c.mu.RUnlock()
 
@@ -109,7 +121,7 @@ func (c *treeClient) serviceClient() (grpcService.TreeServiceClient, error) {
 		return nil, fmt.Errorf("%w: '%s'", ErrUnhealthyEndpoint, c.address)
 	}
 
-	return c.service, nil
+	return c.client, nil
 }
 
 func (c *treeClient) endpoint() string {
@@ -136,5 +148,11 @@ func (c *treeClient) close() error {
 		return nil
 	}
 
-	return c.conn.Close()
+	err := c.conn.Close()
+	if err != nil {
+		return err
+	}
+	c.conn = nil
+
+	return nil
 }
diff --git a/pool/tree/pool.go b/pool/tree/pool.go
index 15d4c68..f889a4f 100644
--- a/pool/tree/pool.go
+++ b/pool/tree/pool.go
@@ -10,9 +10,11 @@ import (
 	"sync"
 	"time"
 
+	rpcapi "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/rpc"
+	rpcclient "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/rpc/client"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/tree"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
-	grpcService "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool/tree/service"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
@@ -51,7 +53,7 @@ var (
 // This interface is expected to have exactly one production implementation - treeClient.
 // Others are expected to be for test purposes only.
 type client interface {
-	serviceClient() (grpcService.TreeServiceClient, error)
+	serviceClient() (*rpcclient.Client, error)
 	endpoint() string
 	isHealthy() bool
 	setHealthy(bool)
@@ -92,6 +94,7 @@ type Pool struct {
 
 	maxRequestAttempts int
 	streamTimeout      time.Duration
+	nodeDialTimeout    time.Duration
 
 	startIndicesMtx sync.RWMutex
 	// startIndices points to the client from which the next request will be executed.
@@ -254,7 +257,7 @@ func (p *Pool) Dial(ctx context.Context) error {
 	for i, nodes := range p.rebalanceParams.nodesGroup {
 		clients := make([]client, len(nodes))
 		for j, node := range nodes {
-			clients[j] = newTreeClient(node.Address(), p.dialOptions...)
+			clients[j] = newTreeClient(node.Address(), p.dialOptions, p.nodeDialTimeout, p.streamTimeout)
 			if err := clients[j].dial(ctx); err != nil {
 				p.log(zap.WarnLevel, "failed to dial tree client", zap.String("address", node.Address()), zap.Error(err))
 				continue
@@ -336,11 +339,11 @@ func (x *InitParameters) SetMaxRequestAttempts(maxAttempts int) {
 // Can return predefined errors:
 // * ErrNodeNotFound
 // * ErrNodeAccessDenied.
-func (p *Pool) GetNodes(ctx context.Context, prm GetNodesParams) ([]*grpcService.GetNodeByPathResponse_Info, error) {
-	request := &grpcService.GetNodeByPathRequest{
-		Body: &grpcService.GetNodeByPathRequest_Body{
-			ContainerId:   prm.CID[:],
-			TreeId:        prm.TreeID,
+func (p *Pool) GetNodes(ctx context.Context, prm GetNodesParams) ([]tree.GetNodeByPathResponseInfo, error) {
+	request := &tree.GetNodeByPathRequest{
+		Body: &tree.GetNodeByPathRequestBody{
+			ContainerID:   prm.CID[:],
+			TreeID:        prm.TreeID,
 			Path:          prm.Path,
 			Attributes:    prm.Meta,
 			PathAttribute: prm.PathAttribute,
@@ -355,16 +358,14 @@ func (p *Pool) GetNodes(ctx context.Context, prm GetNodesParams) ([]*grpcService
 		return nil, err
 	}
 
-	var resp *grpcService.GetNodeByPathResponse
-	err := p.requestWithRetry(ctx, func(client grpcService.TreeServiceClient) (inErr error) {
-		reqCtx, cancel := context.WithTimeout(ctx, p.streamTimeout)
-		defer cancel()
-		resp, inErr = client.GetNodeByPath(reqCtx, request)
+	var resp *tree.GetNodeByPathResponse
+	err := p.requestWithRetry(ctx, func(client *rpcclient.Client) (inErr error) {
+		resp, inErr = rpcapi.GetNodeByPath(client, request, rpcclient.WithContext(ctx))
 		// Pool wants to do retry 'GetNodeByPath' request if result is empty.
 		// Empty result is expected due to delayed tree service sync.
 		// Return an error there to trigger retry and ignore it after,
 		// to keep compatibility with 'GetNodeByPath' implementation.
-		if inErr == nil && len(resp.GetBody().GetNodes()) == 0 {
+		if inErr == nil && len(resp.Body.Nodes) == 0 {
 			return errNodeEmptyResult
 		}
 		return handleError("failed to get node by path", inErr)
@@ -374,50 +375,53 @@ func (p *Pool) GetNodes(ctx context.Context, prm GetNodesParams) ([]*grpcService
 		return nil, err
 	}
 
-	return resp.GetBody().GetNodes(), nil
+	return resp.Body.Nodes, nil
 }
 
 // SubTreeReader is designed to read list of subtree nodes FrostFS tree service.
 //
 // Must be initialized using Pool.GetSubTree, any other usage is unsafe.
 type SubTreeReader struct {
-	cli grpcService.TreeService_GetSubTreeClient
+	cli *rpcapi.GetSubTreeResponseReader
 }
 
 // Read reads another list of the subtree nodes.
-func (x *SubTreeReader) Read(buf []*grpcService.GetSubTreeResponse_Body) (int, error) {
+func (x *SubTreeReader) Read(buf []*tree.GetSubTreeResponseBody) (int, error) {
 	for i := range buf {
-		resp, err := x.cli.Recv()
+		var resp tree.GetSubTreeResponse
+		err := x.cli.Read(&resp)
 		if err == io.EOF {
 			return i, io.EOF
 		} else if err != nil {
 			return i, handleError("failed to get sub tree", err)
 		}
-		buf[i] = resp.GetBody()
+		buf[i] = resp.Body
 	}
 
 	return len(buf), nil
 }
 
 // ReadAll reads all nodes subtree nodes.
-func (x *SubTreeReader) ReadAll() ([]*grpcService.GetSubTreeResponse_Body, error) {
-	var res []*grpcService.GetSubTreeResponse_Body
+func (x *SubTreeReader) ReadAll() ([]*tree.GetSubTreeResponseBody, error) {
+	var res []*tree.GetSubTreeResponseBody
 	for {
-		resp, err := x.cli.Recv()
+		var resp tree.GetSubTreeResponse
+		err := x.cli.Read(&resp)
 		if err == io.EOF {
 			break
 		} else if err != nil {
 			return nil, handleError("failed to get sub tree", err)
 		}
-		res = append(res, resp.GetBody())
+		res = append(res, resp.Body)
 	}
 
 	return res, nil
 }
 
 // Next gets the next node from subtree.
-func (x *SubTreeReader) Next() (*grpcService.GetSubTreeResponse_Body, error) {
-	resp, err := x.cli.Recv()
+func (x *SubTreeReader) Next() (*tree.GetSubTreeResponseBody, error) {
+	var resp tree.GetSubTreeResponse
+	err := x.cli.Read(&resp)
 	if err == io.EOF {
 		return nil, io.EOF
 	}
@@ -425,7 +429,7 @@ func (x *SubTreeReader) Next() (*grpcService.GetSubTreeResponse_Body, error) {
 		return nil, handleError("failed to get sub tree", err)
 	}
 
-	return resp.GetBody(), nil
+	return resp.Body, nil
 }
 
 // GetSubTree invokes eponymous method from TreeServiceClient.
@@ -434,22 +438,22 @@ func (x *SubTreeReader) Next() (*grpcService.GetSubTreeResponse_Body, error) {
 // * ErrNodeNotFound
 // * ErrNodeAccessDenied.
 func (p *Pool) GetSubTree(ctx context.Context, prm GetSubTreeParams) (*SubTreeReader, error) {
-	request := &grpcService.GetSubTreeRequest{
-		Body: &grpcService.GetSubTreeRequest_Body{
-			ContainerId: prm.CID[:],
-			TreeId:      prm.TreeID,
-			RootId:      prm.RootID,
+	request := &tree.GetSubTreeRequest{
+		Body: &tree.GetSubTreeRequestBody{
+			ContainerID: prm.CID[:],
+			TreeID:      prm.TreeID,
+			RootID:      prm.RootID,
 			Depth:       prm.Depth,
 			BearerToken: prm.BearerToken,
-			OrderBy:     new(grpcService.GetSubTreeRequest_Body_Order),
+			OrderBy:     new(tree.GetSubTreeRequestBodyOrder),
 		},
 	}
 
 	switch prm.Order {
 	case AscendingOrder:
-		request.Body.OrderBy.Direction = grpcService.GetSubTreeRequest_Body_Order_Asc
+		request.Body.OrderBy.Direction = tree.GetSubTreeRequestBodyOrderAsc
 	default:
-		request.Body.OrderBy.Direction = grpcService.GetSubTreeRequest_Body_Order_None
+		request.Body.OrderBy.Direction = tree.GetSubTreeRequestBodyOrderNone
 	}
 
 	start := time.Now()
@@ -457,9 +461,9 @@ func (p *Pool) GetSubTree(ctx context.Context, prm GetSubTreeParams) (*SubTreeRe
 		return nil, err
 	}
 
-	var cli grpcService.TreeService_GetSubTreeClient
-	err := p.requestWithRetry(ctx, func(client grpcService.TreeServiceClient) (inErr error) {
-		cli, inErr = client.GetSubTree(ctx, request)
+	var cli *rpcapi.GetSubTreeResponseReader
+	err := p.requestWithRetry(ctx, func(client *rpcclient.Client) (inErr error) {
+		cli, inErr = rpcapi.GetSubTree(client, request, rpcclient.WithContext(ctx))
 		return handleError("failed to get sub tree client", inErr)
 	})
 	p.methods[methodGetSubTree].IncRequests(time.Since(start))
@@ -476,11 +480,11 @@ func (p *Pool) GetSubTree(ctx context.Context, prm GetSubTreeParams) (*SubTreeRe
 // * ErrNodeNotFound
 // * ErrNodeAccessDenied.
 func (p *Pool) AddNode(ctx context.Context, prm AddNodeParams) (uint64, error) {
-	request := &grpcService.AddRequest{
-		Body: &grpcService.AddRequest_Body{
-			ContainerId: prm.CID[:],
-			TreeId:      prm.TreeID,
-			ParentId:    prm.Parent,
+	request := &tree.AddRequest{
+		Body: &tree.AddRequestBody{
+			ContainerID: prm.CID[:],
+			TreeID:      prm.TreeID,
+			ParentID:    prm.Parent,
 			Meta:        metaToKV(prm.Meta),
 			BearerToken: prm.BearerToken,
 		},
@@ -491,11 +495,9 @@ func (p *Pool) AddNode(ctx context.Context, prm AddNodeParams) (uint64, error) {
 		return 0, err
 	}
 
-	var resp *grpcService.AddResponse
-	err := p.requestWithRetry(ctx, func(client grpcService.TreeServiceClient) (inErr error) {
-		reqCtx, cancel := context.WithTimeout(ctx, p.streamTimeout)
-		defer cancel()
-		resp, inErr = client.Add(reqCtx, request)
+	var resp *tree.AddResponse
+	err := p.requestWithRetry(ctx, func(client *rpcclient.Client) (inErr error) {
+		resp, inErr = rpcapi.Add(client, request, rpcclient.WithContext(ctx))
 		return handleError("failed to add node", inErr)
 	})
 	p.methods[methodAddNode].IncRequests(time.Since(start))
@@ -503,7 +505,7 @@ func (p *Pool) AddNode(ctx context.Context, prm AddNodeParams) (uint64, error) {
 		return 0, err
 	}
 
-	return resp.GetBody().GetNodeId(), nil
+	return resp.Body.NodeID, nil
 }
 
 // AddNodeByPath invokes eponymous method from TreeServiceClient.
@@ -512,10 +514,10 @@ func (p *Pool) AddNode(ctx context.Context, prm AddNodeParams) (uint64, error) {
 // * ErrNodeNotFound
 // * ErrNodeAccessDenied.
 func (p *Pool) AddNodeByPath(ctx context.Context, prm AddNodeByPathParams) (uint64, error) {
-	request := &grpcService.AddByPathRequest{
-		Body: &grpcService.AddByPathRequest_Body{
-			ContainerId:   prm.CID[:],
-			TreeId:        prm.TreeID,
+	request := &tree.AddByPathRequest{
+		Body: &tree.AddByPathRequestBody{
+			ContainerID:   prm.CID[:],
+			TreeID:        prm.TreeID,
 			Path:          prm.Path,
 			Meta:          metaToKV(prm.Meta),
 			PathAttribute: prm.PathAttribute,
@@ -528,11 +530,9 @@ func (p *Pool) AddNodeByPath(ctx context.Context, prm AddNodeByPathParams) (uint
 		return 0, err
 	}
 
-	var resp *grpcService.AddByPathResponse
-	err := p.requestWithRetry(ctx, func(client grpcService.TreeServiceClient) (inErr error) {
-		reqCtx, cancel := context.WithTimeout(ctx, p.streamTimeout)
-		defer cancel()
-		resp, inErr = client.AddByPath(reqCtx, request)
+	var resp *tree.AddByPathResponse
+	err := p.requestWithRetry(ctx, func(client *rpcclient.Client) (inErr error) {
+		resp, inErr = rpcapi.AddByPath(client, request, rpcclient.WithContext(ctx))
 		return handleError("failed to add node by path", inErr)
 	})
 	p.methods[methodAddNodeByPath].IncRequests(time.Since(start))
@@ -540,15 +540,15 @@ func (p *Pool) AddNodeByPath(ctx context.Context, prm AddNodeByPathParams) (uint
 		return 0, err
 	}
 
-	body := resp.GetBody()
+	body := resp.Body
 	if body == nil {
 		return 0, errors.New("nil body in tree service response")
-	} else if len(body.GetNodes()) == 0 {
+	} else if len(body.Nodes) == 0 {
 		return 0, errors.New("empty list of added nodes in tree service response")
 	}
 
 	// The first node is the leaf that we add, according to tree service docs.
-	return body.GetNodes()[0], nil
+	return body.Nodes[0], nil
 }
 
 // MoveNode invokes eponymous method from TreeServiceClient.
@@ -557,12 +557,12 @@ func (p *Pool) AddNodeByPath(ctx context.Context, prm AddNodeByPathParams) (uint
 // * ErrNodeNotFound
 // * ErrNodeAccessDenied.
 func (p *Pool) MoveNode(ctx context.Context, prm MoveNodeParams) error {
-	request := &grpcService.MoveRequest{
-		Body: &grpcService.MoveRequest_Body{
-			ContainerId: prm.CID[:],
-			TreeId:      prm.TreeID,
-			NodeId:      prm.NodeID,
-			ParentId:    prm.ParentID,
+	request := &tree.MoveRequest{
+		Body: &tree.MoveRequestBody{
+			ContainerID: prm.CID[:],
+			TreeID:      prm.TreeID,
+			NodeID:      prm.NodeID,
+			ParentID:    prm.ParentID,
 			Meta:        metaToKV(prm.Meta),
 			BearerToken: prm.BearerToken,
 		},
@@ -573,10 +573,8 @@ func (p *Pool) MoveNode(ctx context.Context, prm MoveNodeParams) error {
 		return err
 	}
 
-	err := p.requestWithRetry(ctx, func(client grpcService.TreeServiceClient) error {
-		reqCtx, cancel := context.WithTimeout(ctx, p.streamTimeout)
-		defer cancel()
-		if _, err := client.Move(reqCtx, request); err != nil {
+	err := p.requestWithRetry(ctx, func(client *rpcclient.Client) error {
+		if _, err := rpcapi.Move(client, request, rpcclient.WithContext(ctx)); err != nil {
 			return handleError("failed to move node", err)
 		}
 		return nil
@@ -592,11 +590,11 @@ func (p *Pool) MoveNode(ctx context.Context, prm MoveNodeParams) error {
 // * ErrNodeNotFound
 // * ErrNodeAccessDenied.
 func (p *Pool) RemoveNode(ctx context.Context, prm RemoveNodeParams) error {
-	request := &grpcService.RemoveRequest{
-		Body: &grpcService.RemoveRequest_Body{
-			ContainerId: prm.CID[:],
-			TreeId:      prm.TreeID,
-			NodeId:      prm.NodeID,
+	request := &tree.RemoveRequest{
+		Body: &tree.RemoveRequestBody{
+			ContainerID: prm.CID[:],
+			TreeID:      prm.TreeID,
+			NodeID:      prm.NodeID,
 			BearerToken: prm.BearerToken,
 		},
 	}
@@ -606,10 +604,8 @@ func (p *Pool) RemoveNode(ctx context.Context, prm RemoveNodeParams) error {
 		return err
 	}
 
-	err := p.requestWithRetry(ctx, func(client grpcService.TreeServiceClient) error {
-		reqCtx, cancel := context.WithTimeout(ctx, p.streamTimeout)
-		defer cancel()
-		if _, err := client.Remove(reqCtx, request); err != nil {
+	err := p.requestWithRetry(ctx, func(client *rpcclient.Client) error {
+		if _, err := rpcapi.Remove(client, request, rpcclient.WithContext(ctx)); err != nil {
 			return handleError("failed to remove node", err)
 		}
 		return nil
@@ -661,11 +657,11 @@ func handleError(msg string, err error) error {
 	return fmt.Errorf("%s: %w", msg, err)
 }
 
-func metaToKV(meta map[string]string) []*grpcService.KeyValue {
-	result := make([]*grpcService.KeyValue, 0, len(meta))
+func metaToKV(meta map[string]string) []*tree.KeyValue {
+	result := make([]*tree.KeyValue, 0, len(meta))
 
 	for key, value := range meta {
-		result = append(result, &grpcService.KeyValue{Key: key, Value: []byte(value)})
+		result = append(result, &tree.KeyValue{Key: key, Value: []byte(value)})
 	}
 
 	return result
@@ -814,10 +810,10 @@ func (p *Pool) setStartIndices(i, j int) {
 	p.startIndicesMtx.Unlock()
 }
 
-func (p *Pool) requestWithRetry(ctx context.Context, fn func(client grpcService.TreeServiceClient) error) error {
+func (p *Pool) requestWithRetry(ctx context.Context, fn func(client *rpcclient.Client) error) error {
 	var (
 		err, finErr error
-		cl          grpcService.TreeServiceClient
+		cl          *rpcclient.Client
 	)
 
 	reqID := GetRequestID(ctx)
diff --git a/pool/tree/pool_signature.go b/pool/tree/pool_signature.go
index 5a8def1..f0d890a 100644
--- a/pool/tree/pool_signature.go
+++ b/pool/tree/pool_signature.go
@@ -9,7 +9,7 @@ type message interface {
 	SignedDataSize() int
 	ReadSignedData([]byte) ([]byte, error)
 	GetSignature() *tree.Signature
-	SetSignature(*tree.Signature)
+	SetSignature(*tree.Signature) error
 }
 
 // signMessage uses the pool key and signs any protobuf
@@ -29,10 +29,8 @@ func (p *Pool) signRequest(m message) error {
 
 	rawPub := make([]byte, keySDK.Public().MaxEncodedSize())
 	rawPub = rawPub[:keySDK.Public().Encode(rawPub)]
-	m.SetSignature(&tree.Signature{
+	return m.SetSignature(&tree.Signature{
 		Key:  rawPub,
 		Sign: data,
 	})
-
-	return nil
 }
diff --git a/pool/tree/pool_test.go b/pool/tree/pool_test.go
index c2e50eb..f9f4142 100644
--- a/pool/tree/pool_test.go
+++ b/pool/tree/pool_test.go
@@ -5,9 +5,9 @@ import (
 	"errors"
 	"testing"
 
+	rpcClient "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/rpc/client"
 	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
-	grpcService "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool/tree/service"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/zap/zaptest"
 )
@@ -17,7 +17,7 @@ type treeClientMock struct {
 	err     bool
 }
 
-func (t *treeClientMock) serviceClient() (grpcService.TreeServiceClient, error) {
+func (t *treeClientMock) serviceClient() (*rpcClient.Client, error) {
 	if t.err {
 		return nil, errors.New("serviceClient() mock error")
 	}
@@ -99,7 +99,7 @@ func TestRetry(t *testing.T) {
 		maxRequestAttempts: lenNodes,
 	}
 
-	makeFn := func(client grpcService.TreeServiceClient) error {
+	makeFn := func(client *rpcClient.Client) error {
 		return nil
 	}
 
@@ -171,7 +171,7 @@ func TestRetry(t *testing.T) {
 
 	t.Run("error empty result", func(t *testing.T) {
 		errNodes, index := 2, 0
-		err := p.requestWithRetry(ctx, func(client grpcService.TreeServiceClient) error {
+		err := p.requestWithRetry(ctx, func(client *rpcClient.Client) error {
 			if index < errNodes {
 				index++
 				return errNodeEmptyResult
@@ -184,7 +184,7 @@ func TestRetry(t *testing.T) {
 
 	t.Run("error not found", func(t *testing.T) {
 		errNodes, index := 2, 0
-		err := p.requestWithRetry(ctx, func(client grpcService.TreeServiceClient) error {
+		err := p.requestWithRetry(ctx, func(client *rpcClient.Client) error {
 			if index < errNodes {
 				index++
 				return ErrNodeNotFound
@@ -197,7 +197,7 @@ func TestRetry(t *testing.T) {
 
 	t.Run("error access denied", func(t *testing.T) {
 		var index int
-		err := p.requestWithRetry(ctx, func(client grpcService.TreeServiceClient) error {
+		err := p.requestWithRetry(ctx, func(client *rpcClient.Client) error {
 			index++
 			return ErrNodeAccessDenied
 		})