---
title: "upload-part"
slug: "cli-objectstorage-api-level-upload-part"
updated: 2026-10-08T05:01:44Z
published: 2026-10-08T05:01:44Z
canonical: "cli.ncloud-docs.com/cli-objectstorage-api-level-upload-part"
---

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

# upload-part

Available in Classic and VPC

Upload a part of a multipart upload.

## Syntax

The `upload-part` syntax is as follows:

```
aws s3api upload-part \
    --bucket <bucket> \
    --key <key> \
    --part-number <part-number> \
    --upload-id <upload-id> \
    [--body <body>] \
    [--content-length <content-length>] \
    [--content-md5 <content-md5>] \
    [--sse-customer-algorithm <sse-customer-algorithm>] \
    [--sse-customer-key <sse-customer-key>] \
    [--sse-customer-key-md5 <sse-customer-key-md5>] \
    --endpoint-url <endpoint-url>
```

## Options

This section describes the options available when running `upload-part`.

### Required options

The following options are required for `upload-part`.

| Options | Type | Required | Description |
| --- | --- | --- | --- |
| `--bucket` | String | Required | Bucket name |
| `--key` | String | Required | Object name |
| `--part-number` | Integer | Required | Number of the part being uploaded - The number of parts can range from 1 to 10,000. |
| `--upload-id` | String | Required | Multipart upload ID - See [list-multipart-uploads](/docs/en/cli-objectstorage-api-level-list-multipart-uploads). |

### Optional options

These are the optional options for `upload-part`. Options that are not specified will use their default values.

| Options | Type | Required | Description |
| --- | --- | --- | --- |
| `--body` | String | Optional | Path or file of the object |
| `--content-length` | Long | Optional | Request data size (byte) |
| `--content-md5` | String | Optional | Base64-encoded 128-bit MD5 hash of the request data - Used to validate the integrity of the request data - Calculated automatically if not entered |
| `--sse-customer-algorithm` | String | Optional | User encryption algorithm (AES256) |
| `--sse-customer-key` | String | Optional | User-provided encryption key |
| `--sse-customer-key-md5` | String | Optional | User-provided encryption key's MD5 value |

### Common options

For information about the options common to all `aws` subcommands, see [Object Storage options](/docs/en/guide-objectstorage#%EC%98%B5%EC%85%98).

## Examples

If the part upload request is successful, the part's identification information is returned.

### Command

The command example is as follows:

```
aws s3api upload-part --bucket my-test-bucket \
    --key large.bin \
    --part-number 1 \
    --body part-aa \
    --upload-id {upload_id} \
    --endpoint-url=https://kr.object.ncloudstorage.com
```

### Output

The output example is as follows:

```
{
    "ETag": "\"57325bca2c5c2cb6adf5aa9a66fb4e2d\""
}
```