### Overview

You can use this endpoint to upload a document to an existing Warehouse Inventory Transfer (WITR). To do that, you must be an [Authenticated User](https://developer.sellercloud.com/dev-article/authentication/).

As soon as you authenticate and receive a valid token, it needs to be passed to the service call.

### Endpoint

An example of such an endpoint for **XX** server is:

https://xx.api.sellercloud.com/rest/api/WarehouseInventoryTransfers/{id}/Documents

For your server, the endpoint will be:

https://{your_server_id}.api.sellercloud.com/rest/api/WarehouseInventoryTransfers/{id}/Documents

### Request

- Method Type: **HttpPost**  
- Authorization: Use **Bearer Token** (where ‘Token’ is the token received from token authentication)  
- Header info: **Content-Type: application/json**  
- Parameters: ID of the WITR for which to upload a document  
- Request Body:

```json
{
  "FileContent": "string",
  "FileName": "string",
  "ItemID": 0
}
```

| **Parameter** | **Data Type** | **Description** | **Is Required** |
| --- | --- | --- | --- |
| FileContent | string | Base 64 encoded string representing the file content.<br>Example of how to get Base 64 encoded string of a file in c#:<br>var fileContent = Convert.ToBase64String(File.ReadAllBytes(“”)); | Yes |
| FileName | string | The name of the file to upload. The file extension should be included. Example “document.xlsx”. | Yes |
| ItemID | integer | The ID of the warehouse inventory transfer product item. Can be obtained by calling [Get WITR Products](https://developer.sellercloud.com/get-witr-products/). | No |

### Response

- If the user is authenticated and the document upload is successful, then the response will be **Status Code 200 => OK**
- If an incorrect FileName or FileContent is provided, then the response will be **Status Code 400 => Bad Request**
- If the user is not authenticated, then the response will be **Status Code 401 => Not Valid Token**
- In case of error, the response will be **Status Code 500 => Internal Server Error**