diff --git a/object/service.proto b/object/service.proto
index fae833e..3a0a3de 100644
--- a/object/service.proto
+++ b/object/service.proto
@@ -231,6 +231,38 @@ service ObjectService {
   // - **TOKEN_EXPIRED** (4097, SECTION_SESSION): \
   //   provided session token has expired.
   rpc GetRangeHash(GetRangeHashRequest) returns (GetRangeHashResponse);
+
+  // Put the prepared object into container.
+  // `ContainerID`, `ObjectID`, `OwnerID`, `PayloadHash` and `PayloadLength` of an object MUST be set.
+  //
+  // Extended headers can change `Put` behaviour:
+  // * [ __SYSTEM__NETMAP_EPOCH \
+  //   (`__NEOFS__NETMAP_EPOCH` is deprecated) \
+  //   Will use the requested version of Network Map for object placement
+  //   calculation.
+  //
+  // Please refer to detailed `XHeader` description.
+  //
+  // Statuses:
+  // - **OK** (0, SECTION_SUCCESS): \
+  //   object has been successfully saved in the container;
+  // - Common failures (SECTION_FAILURE_COMMON);
+  // - **ACCESS_DENIED** (2048, SECTION_OBJECT): \
+  //   write access to the container is denied;
+  // - **LOCKED** (2050, SECTION_OBJECT): \
+  //   placement of an object of type TOMBSTONE that includes at least one locked
+  //   object is prohibited;
+  // - **LOCK_NON_REGULAR_OBJECT** (2051, SECTION_OBJECT): \
+  //   placement of an object of type LOCK that includes at least one object of
+  //   type other than REGULAR is prohibited;
+  // - **CONTAINER_NOT_FOUND** (3072, SECTION_CONTAINER): \
+  //   object storage container not found;
+  // - **TOKEN_NOT_FOUND** (4096, SECTION_SESSION): \
+  //   (for trusted object preparation) session private key does not exist or has
+  // been deleted;
+  // - **TOKEN_EXPIRED** (4097, SECTION_SESSION): \
+  //   provided session token has expired.
+  rpc PutSingle(PutSingleRequest) returns (PutSingleResponse);
 }
 
 // GET object request
@@ -709,3 +741,48 @@ message GetRangeHashResponse {
   // transmission.
   neo.fs.v2.session.ResponseVerificationHeader verify_header = 3;
 }
+
+// Object PUT Single request
+message PutSingleRequest {
+    // PUT Single request body
+    message Body {
+      // Prepared object with payload.
+      Object object = 1;
+      // Number of copies of the object to store within the RPC call. By default,
+      // object is processed according to the container's placement policy.
+      // Every number is treated as a minimal number of
+      // nodes in a corresponding placement vector that must store an object
+      // to complete the request successfully. The length MUST equal the placement
+      // vectors number, otherwise request is considered malformed.
+      repeated uint32 copies_number = 2;
+    }
+    // Body of put single object request message.
+    Body body = 1;
+  
+    // Carries request meta information. Header data is used only to regulate
+    // message transport and does not affect request execution.
+    neo.fs.v2.session.RequestMetaHeader meta_header = 2;
+  
+    // Carries request verification information. This header is used to
+    // authenticate the nodes of the message route and check the correctness of
+    // transmission.
+    neo.fs.v2.session.RequestVerificationHeader verify_header = 3;
+}
+
+// Object PUT Single response
+message PutSingleResponse {
+  // PUT Single Object response body
+  message Body {
+  }
+  // Body of put single object response message.
+  Body body = 1;
+
+  // Carries response meta information. Header data is used only to regulate
+  // message transport and does not affect request execution.
+  neo.fs.v2.session.ResponseMetaHeader meta_header = 2;
+
+  // Carries response verification information. This header is used to
+  // authenticate the nodes of the message route and check the correctness of
+  // transmission.
+  neo.fs.v2.session.ResponseVerificationHeader verify_header = 3;
+}
\ No newline at end of file