This API is used to create a tag for a subnet.

POST /v2.0/{project_id}/subnets/{subnet_id}/tags

Table 1 describes the parameters.

**Table 1** Parameter description
Name	Mandatory	Description
project_id	Yes	Specifies the project ID.
subnet_id	Yes	Specifies the subnet ID, which uniquely identifies the subnet. If you use the management console, the value of this parameter is the Network ID value.

**Table 2** Request parameter
Parameter	Type	Mandatory	Description
tag	tag object	Yes	Specifies the tag objects. For details, see Table 3.

**Table 3** **tag** objects
Attribute	Type	Mandatory	Description
key	String	Yes	Specifies the tag key. Cannot be left blank. Can contain a maximum of 36 characters. Can contain only the following character types: Uppercase letters Lowercase letters Digits Special characters, including hyphens (-) and underscores (_) The tag key of a VPC must be unique.
value	String	Yes	Specifies the tag value. Can contain a maximum of 43 characters. Can contain only the following character types: Uppercase letters Lowercase letters Digits Special characters, including hyphens (-) and underscores (_)

POST https://{Endpoint}/v2.0/{project_id}/subnets/{subnet_id}/tags

{
    "tag": {
        "key": "key1",
        "value": "value1"
    }
}

Creating a Tag for a Subnet