---
title: "createFile"
slug: "ai-application-service-cloudoutboundmailer-createfile"
tags: ["Cloud Outbound Mailer"]
updated: 2026-09-17T09:35:44Z
published: 2026-09-17T09:35:44Z
canonical: "api.ncloud-docs.com/ai-application-service-cloudoutboundmailer-createfile"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://api.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# createFile

Available in Classic and VPC

Upload any files you need for purposes like email attachments.

## Request

The following describes the request format for the endpoint. The request format is as follows:

| Method | URI |
| --- | --- |
| POST | /files |

### Request headers

For information about the headers common to all Cloud Outbound Mailer APIs, see [Cloud Outbound Mailer request headers](/docs/en/ai-application-service-cloudoutboundmailer#%EC%9A%94%EC%B2%AD%ED%97%A4%EB%8D%94).

### Request body

The following describes the request body.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `fileList` | File | Required | File to upload |

### Request example

The following is a sample request.

```
curl --location --request POST 'https://mail.apigw.ntruss.com/api/v1/files' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}' \
--form 'fileList=@"/E:/desktop/test.txt"'
```

## Response

The following describes the response format.

### Response body

The following describes the response body.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `tempRequestId` | String | - | Temporary request ID created upon file upload - It can be used to view or delete the file |
| `files` | List | - | List of file to upload - File size for email attachments must be 10 MB or less - See [AttachFile](/docs/en/common-vapidatatype-nesattachfile) |

### Response status codes

For information about the HTTP status codes common to all Cloud Outbound Mailer APIs, see [Cloud Outbound Mailer response status codes](/docs/en/ai-application-service-cloudoutboundmailer#%EC%9D%91%EB%8B%B5%EC%83%81%ED%83%9C%EC%BD%94%EB%93%9C).

### Response example

The following is a sample response.

```
{
  "tempRequestId":"f355aac1-7776-4c0b-8484-20eaa065cb65-99",
  "files":[
    {
      "fileName":"test.txt",
      "fileSize":16,
      "fileId":"40fe58bd-91fe-4f89-a62e-705a7c17d65e-99"
    }
  ]
}
```