diff --git a/object/types.proto b/object/types.proto
index 356ad8b..5c448c3 100644
--- a/object/types.proto
+++ b/object/types.proto
@@ -6,7 +6,7 @@ option go_package = "github.com/nspcc-dev/neofs-api-go/v2/object/grpc;object";
 option csharp_namespace = "NeoFS.API.v2.Object";
 
 import "refs/types.proto";
-import "service/types.proto";
+import "session/types.proto";
 
 // Type of the object payload content
 enum ObjectType {
@@ -77,7 +77,7 @@ message Header {
 
   // Session token, if it was used during Object creation.
   // Need it to verify integrity and authenticity out of Request scope.
-  neo.fs.v2.service.SessionToken session_token = 9;
+  neo.fs.v2.session.SessionToken session_token = 9;
 
   // Attribute groups the user-defined Key-Value pairs attached to the object
   message Attribute {
diff --git a/service/types.proto b/service/types.proto
index f657d5f..3f9db75 100644
--- a/service/types.proto
+++ b/service/types.proto
@@ -7,6 +7,7 @@ option csharp_namespace = "NeoFS.API.v2.Service";
 
 import "acl/types.proto";
 import "refs/types.proto";
+import "session/types.proto";
 
 // Extended headers for Request/Response
 message XHeader {
@@ -17,80 +18,6 @@ message XHeader {
   string value = 2;
 }
 
-// Context information for Session Tokens related to ObjectService requests
-message ObjectSessionContext {
-  // Object request verbs
-  enum Verb {
-    // Unknown verb
-    VERB_UNSPECIFIED = 0;
-
-    // Refers to object.Put RPC call
-    PUT = 1;
-
-    // Refers to object.Get RPC call
-    GET = 2;
-
-    // Refers to object.Head RPC call
-    HEAD = 3;
-
-    // Refers to object.Search RPC call
-    SEARCH = 4;
-
-    // Refers to object.Delete RPC call
-    DELETE = 5;
-
-    // Refers to object.GetRange RPC call
-    RANGE = 6;
-
-    // Refers to object.GetRangeHash RPC call
-    RANGEHASH = 7;
-  }
-  // Verb is a type of request for which the token is issued
-  Verb verb = 1;
-
-  // Related Object address
-  neo.fs.v2.refs.Address address = 2;
-}
-
-// NeoFS session token.
-message SessionToken {
-  // Session token body
-  message Body {
-    // ID is a token identifier. valid UUIDv4 represented in bytes
-    bytes id = 1;
-
-    // OwnerID carries identifier of the session initiator.
-    neo.fs.v2.refs.OwnerID owner_id = 2;
-
-    // Lifetime parameters of the token. Filed names taken from rfc7519.
-    message TokenLifetime {
-      // Expiration Epoch
-      uint64 exp = 1;
-
-      // Not valid before Epoch
-      uint64 nbf = 2;
-
-      // Issued at Epoch
-      uint64 iat = 3;
-    }
-    // Lifetime is a lifetime of the session
-    TokenLifetime lifetime = 3;
-
-    // SessionKey is a public key of session key
-    bytes session_key = 4;
-
-    // Carries context of the session.
-    oneof context {
-      // ObjectService session context.
-      ObjectSessionContext object = 5;
-    }
-  }
-  // Session Token body
-  Body body = 1;
-
-  // Signature is a signature of session token information
-  neo.fs.v2.refs.Signature signature = 2;
-}
 
 // Information about the request
 message RequestMetaHeader {
@@ -107,7 +34,7 @@ message RequestMetaHeader {
   repeated XHeader x_headers = 4;
 
   // Token is a token of the session within which the request is sent
-  SessionToken session_token = 5;
+  neo.fs.v2.session.SessionToken session_token = 5;
 
   // Bearer is a Bearer token of the request
   neo.fs.v2.acl.BearerToken bearer_token = 6;
diff --git a/session/types.proto b/session/types.proto
new file mode 100644
index 0000000..84ba10c
--- /dev/null
+++ b/session/types.proto
@@ -0,0 +1,83 @@
+syntax = "proto3";
+
+package neo.fs.v2.session;
+
+option go_package = "github.com/nspcc-dev/neofs-api-go/v2/session/grpc;session";
+option csharp_namespace = "NeoFS.API.v2.Session";
+
+import "refs/types.proto";
+
+// Context information for Session Tokens related to ObjectService requests
+message ObjectSessionContext {
+  // Object request verbs
+  enum Verb {
+    // Unknown verb
+    VERB_UNSPECIFIED = 0;
+
+    // Refers to object.Put RPC call
+    PUT = 1;
+
+    // Refers to object.Get RPC call
+    GET = 2;
+
+    // Refers to object.Head RPC call
+    HEAD = 3;
+
+    // Refers to object.Search RPC call
+    SEARCH = 4;
+
+    // Refers to object.Delete RPC call
+    DELETE = 5;
+
+    // Refers to object.GetRange RPC call
+    RANGE = 6;
+
+    // Refers to object.GetRangeHash RPC call
+    RANGEHASH = 7;
+  }
+  // Verb is a type of request for which the token is issued
+  Verb verb = 1;
+
+  // Related Object address
+  neo.fs.v2.refs.Address address = 2;
+}
+
+// NeoFS session token.
+message SessionToken {
+  // Session token body
+  message Body {
+    // ID is a token identifier. valid UUIDv4 represented in bytes
+    bytes id = 1;
+
+    // OwnerID carries identifier of the session initiator.
+    neo.fs.v2.refs.OwnerID owner_id = 2;
+
+    // Lifetime parameters of the token. Filed names taken from rfc7519.
+    message TokenLifetime {
+      // Expiration Epoch
+      uint64 exp = 1;
+
+      // Not valid before Epoch
+      uint64 nbf = 2;
+
+      // Issued at Epoch
+      uint64 iat = 3;
+    }
+    // Lifetime is a lifetime of the session
+    TokenLifetime lifetime = 3;
+
+    // SessionKey is a public key of session key
+    bytes session_key = 4;
+
+    // Carries context of the session.
+    oneof context {
+      // ObjectService session context.
+      ObjectSessionContext object = 5;
+    }
+  }
+  // Session Token body
+  Body body = 1;
+
+  // Signature is a signature of session token information
+  neo.fs.v2.refs.Signature signature = 2;
+}