# Create Bucket - CreateBucket

## Overview

Create Bucket

 > 💡 The -BucketName parameter will form part of the domain name (the domain name associated with the Bucket by default is <BucketName>.ufile.ucloud.cn) and must be globally unique. The BucketName parameter must comply with the Bucket naming standards, which are as follows: (1) The length should be between 3\~63 bytes; (2) It can only contain lowercase letters, numbers, and hyphens; (3) The first and last characters cannot be hyphens.




## Definition

### Public Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Action**     | string  | Corresponding API command name, the current API is `CreateBucket`.                      | **Yes** |
| **PublicKey**  | string  | The user's public key can be obtained from [Console](https://console.scloudsg.com/uaccount/api_manage)                                             | **Yes** |
| **Signature**  | string  | User signature generated based on public key and API command, see [Signature Algorithm](/docs/api/summary/signature.md)  | **Yes** |

### Request Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Region** | string | Region. See [List of Regions and Availability Zones](/docs/api/summary/regionlist) |**Yes**|
| **ProjectId** | string | Project ID. If not filled in, the default project is used, sub-accounts must be filled in. Please refer to the [GetProjectList interface](/docs/api/summary/get_project_list). |No|
| **BucketName** | string | The name of the bucket to be created, which is globally unique. |**Yes**|
| **Type** | string | Bucket access type, public or private; default is private |No|
| **Tag** | string | The business group to which the Bucket belongs, default is 'default'. |No|

### Response Field

| Field Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **RetCode** | int | Return status code. If it is 0, it means successful return. If it is not 0, it means failure. |**Yes**|
| **Action** | string | Operation command name. |**Yes**|
| **Message** | string | Returns an error message, providing detailed description when `RetCode` is non-zero. |No|
| **BucketName** | string | Name of the created Bucket |No|
| **BucketId** | string | ID of the created Bucket |No|




## Example

### Request Example
    
```
https://api.scloudsg.com/?Action=CreateBucket
&BucketName=blue
&Type=public
&Region=cn-bj2
&Tag=ajkWmXoX
```

### Response Example
    
```json
{
  "Action": "CreateBucketResponse",
  "BucketId": "ufile-xxx",
  "BucketName": "blue",
  "Retcode": 0
}
```