diff --git a/v2/accounting/accounting.go b/v2/accounting/accounting.go
index f2c0d98..619f220 100644
--- a/v2/accounting/accounting.go
+++ b/v2/accounting/accounting.go
@@ -9,26 +9,10 @@ type BalanceRequestBody struct {
 	ownerID *refs.OwnerID
 }
 
-type BalanceRequest struct {
-	body *BalanceRequestBody
-
-	metaHeader *session.RequestMetaHeader
-
-	verifyHeader *session.RequestVerificationHeader
-}
-
 type BalanceResponseBody struct {
 	bal *Decimal
 }
 
-type BalanceResponse struct {
-	body *BalanceResponseBody
-
-	metaHeader *session.ResponseMetaHeader
-
-	verifyHeader *session.ResponseVerificationHeader
-}
-
 type Decimal struct {
 	val int64
 
diff --git a/v2/accounting/service.go b/v2/accounting/service.go
new file mode 100644
index 0000000..8443c66
--- /dev/null
+++ b/v2/accounting/service.go
@@ -0,0 +1,27 @@
+package accounting
+
+import (
+	"context"
+
+	"github.com/nspcc-dev/neofs-api-go/v2/session"
+)
+
+type Service interface {
+	Balance(context.Context, *BalanceRequest) (*BalanceResponse, error)
+}
+
+type BalanceRequest struct {
+	body *BalanceRequestBody
+
+	metaHeader *session.RequestMetaHeader
+
+	verifyHeader *session.RequestVerificationHeader
+}
+
+type BalanceResponse struct {
+	body *BalanceResponseBody
+
+	metaHeader *session.ResponseMetaHeader
+
+	verifyHeader *session.ResponseVerificationHeader
+}
diff --git a/v2/container/service.go b/v2/container/service.go
new file mode 100644
index 0000000..f664084
--- /dev/null
+++ b/v2/container/service.go
@@ -0,0 +1,96 @@
+package container
+
+import (
+	"context"
+
+	"github.com/nspcc-dev/neofs-api-go/v2/session"
+)
+
+type Service interface {
+	Put(context.Context, *PutRequest) (*PutResponse, error)
+	Delete(context.Context, *DeleteRequest) (*DeleteResponse, error)
+	Get(context.Context, *GetRequest) (*GetResponse, error)
+	List(context.Context, *ListRequest) (*ListResponse, error)
+	SetExtendedACL(context.Context, *SetExtendedACLRequest) (*SetExtendedACLResponse, error)
+	GetExtendedACL(context.Context, *GetExtendedACLRequest) (*GetExtendedACLResponse, error)
+}
+
+type PutRequest struct {
+	body *PutRequestBody
+
+	metaHeader *session.RequestMetaHeader
+
+	verifyHeader *session.RequestVerificationHeader
+}
+
+type PutResponse struct {
+	body *PutResponseBody
+
+	metaHeader *session.ResponseMetaHeader
+
+	verifyHeader *session.ResponseVerificationHeader
+}
+
+type DeleteRequest struct {
+	body *DeleteRequestBody
+
+	metaHeader *session.RequestMetaHeader
+
+	verifyHeader *session.RequestVerificationHeader
+}
+
+type DeleteResponse struct {
+	body *DeleteResponseBody
+
+	metaHeader *session.ResponseMetaHeader
+
+	verifyHeader *session.ResponseVerificationHeader
+}
+
+type ListRequest struct {
+	body *ListRequestBody
+
+	metaHeader *session.RequestMetaHeader
+
+	verifyHeader *session.RequestVerificationHeader
+}
+
+type ListResponse struct {
+	body *ListResponseBody
+
+	metaHeader *session.ResponseMetaHeader
+
+	verifyHeader *session.ResponseVerificationHeader
+}
+
+type SetExtendedACLRequest struct {
+	body *SetExtendedACLRequestBody
+
+	metaHeader *session.RequestMetaHeader
+
+	verifyHeader *session.RequestVerificationHeader
+}
+
+type SetExtendedACLResponse struct {
+	body *SetExtendedACLResponseBody
+
+	metaHeader *session.ResponseMetaHeader
+
+	verifyHeader *session.ResponseVerificationHeader
+}
+
+type GetExtendedACLRequest struct {
+	body *GetExtendedACLRequestBody
+
+	metaHeader *session.RequestMetaHeader
+
+	verifyHeader *session.RequestVerificationHeader
+}
+
+type GetExtendedACLResponse struct {
+	body *GetExtendedACLResponseBody
+
+	metaHeader *session.ResponseMetaHeader
+
+	verifyHeader *session.ResponseVerificationHeader
+}
diff --git a/v2/container/types.go b/v2/container/types.go
index ae4a3c1..0e53639 100644
--- a/v2/container/types.go
+++ b/v2/container/types.go
@@ -31,26 +31,10 @@ type PutRequestBody struct {
 	sig *refs.Signature
 }
 
-type PutRequest struct {
-	body *PutRequestBody
-
-	metaHeader *session.RequestMetaHeader
-
-	verifyHeader *session.RequestVerificationHeader
-}
-
 type PutResponseBody struct {
 	cid *refs.ContainerID
 }
 
-type PutResponse struct {
-	body *PutResponseBody
-
-	metaHeader *session.ResponseMetaHeader
-
-	verifyHeader *session.ResponseVerificationHeader
-}
-
 type GetRequestBody struct {
 	cid *refs.ContainerID
 }
@@ -81,98 +65,34 @@ type DeleteRequestBody struct {
 	sig *refs.Signature
 }
 
-type DeleteRequest struct {
-	body *DeleteRequestBody
-
-	metaHeader *session.RequestMetaHeader
-
-	verifyHeader *session.RequestVerificationHeader
-}
-
 type DeleteResponseBody struct{}
 
-type DeleteResponse struct {
-	body *DeleteResponseBody
-
-	metaHeader *session.ResponseMetaHeader
-
-	verifyHeader *session.ResponseVerificationHeader
-}
-
 type ListRequestBody struct {
 	ownerID *refs.OwnerID
 }
 
-type ListRequest struct {
-	body *ListRequestBody
-
-	metaHeader *session.RequestMetaHeader
-
-	verifyHeader *session.RequestVerificationHeader
-}
-
 type ListResponseBody struct {
 	cidList []*refs.ContainerID
 }
 
-type ListResponse struct {
-	body *ListResponseBody
-
-	metaHeader *session.ResponseMetaHeader
-
-	verifyHeader *session.ResponseVerificationHeader
-}
-
 type SetExtendedACLRequestBody struct {
 	eacl *acl.Table
 
 	sig *refs.Signature
 }
 
-type SetExtendedACLRequest struct {
-	body *SetExtendedACLRequestBody
-
-	metaHeader *session.RequestMetaHeader
-
-	verifyHeader *session.RequestVerificationHeader
-}
-
 type SetExtendedACLResponseBody struct{}
 
-type SetExtendedACLResponse struct {
-	body *SetExtendedACLResponseBody
-
-	metaHeader *session.ResponseMetaHeader
-
-	verifyHeader *session.ResponseVerificationHeader
-}
-
 type GetExtendedACLRequestBody struct {
 	cid *refs.ContainerID
 }
 
-type GetExtendedACLRequest struct {
-	body *GetExtendedACLRequestBody
-
-	metaHeader *session.RequestMetaHeader
-
-	verifyHeader *session.RequestVerificationHeader
-}
-
 type GetExtendedACLResponseBody struct {
 	eacl *acl.Table
 
 	sig *refs.Signature
 }
 
-type GetExtendedACLResponse struct {
-	body *GetExtendedACLResponseBody
-
-	metaHeader *session.ResponseMetaHeader
-
-	verifyHeader *session.ResponseVerificationHeader
-}
-
 func (a *Attribute) GetKey() string {
 	if a != nil {
 		return a.key
diff --git a/v2/session/service.go b/v2/session/service.go
new file mode 100644
index 0000000..5a07e2d
--- /dev/null
+++ b/v2/session/service.go
@@ -0,0 +1,25 @@
+package session
+
+import (
+	"context"
+)
+
+type Service interface {
+	Create(context.Context, *CreateRequest) (*CreateResponse, error)
+}
+
+type CreateRequest struct {
+	body *CreateRequestBody
+
+	metaHeader *RequestMetaHeader
+
+	verifyHeader *RequestVerificationHeader
+}
+
+type CreateResponse struct {
+	body *CreateResponseBody
+
+	metaHeader *ResponseMetaHeader
+
+	verifyHeader *ResponseVerificationHeader
+}
diff --git a/v2/session/types.go b/v2/session/types.go
index 9e87603..0322b25 100644
--- a/v2/session/types.go
+++ b/v2/session/types.go
@@ -11,28 +11,12 @@ type CreateRequestBody struct {
 	expiration uint64
 }
 
-type CreateRequest struct {
-	body *CreateRequestBody
-
-	metaHeader *RequestMetaHeader
-
-	verifyHeader *RequestVerificationHeader
-}
-
 type CreateResponseBody struct {
 	id []byte
 
 	sessionKey []byte
 }
 
-type CreateResponse struct {
-	body *CreateResponseBody
-
-	metaHeader *ResponseMetaHeader
-
-	verifyHeader *ResponseVerificationHeader
-}
-
 type XHeader struct {
 	key, val string
 }