import os
from gcore import Gcore

client = Gcore(
    api_key=os.environ.get("GCORE_API_KEY"),  # This is the default and can be omitted
)
task_id_list = client.cloud.instances.interfaces.attach(
    instance_id="bf325375-9af6-4c8b-a2fc-7f6f4ca02e2e",
    project_id=1,
    region_id=1,
)
print(task_id_list.tasks)

package main

import (
	"context"
	"fmt"

	"github.com/G-Core/gcore-go"
	"github.com/G-Core/gcore-go/cloud"
	"github.com/G-Core/gcore-go/option"
)

func main() {
	client := gcore.NewClient(
		option.WithAPIKey("My API Key"),
	)
	taskIDList, err := client.Cloud.Instances.Interfaces.Attach(
		context.TODO(),
		"bf325375-9af6-4c8b-a2fc-7f6f4ca02e2e",
		cloud.InstanceInterfaceAttachParams{
			ProjectID: gcore.Int(1),
			RegionID:  gcore.Int(1),
			OfExternal: &cloud.InstanceInterfaceAttachParamsBodyExternal{
				Type: "external",
			},
		},
	)
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", taskIDList.Tasks)
}

curl --request POST \
  --url https://api.gcore.com/cloud/v1/instances/{project_id}/{region_id}/{instance_id}/attach_interface \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "ddos_profile": {
    "profile_template": 123,
    "fields": [
      {
        "base_field": 123,
        "field_value": null,
        "value": "<string>"
      }
    ],
    "profile_template_name": "<string>"
  },
  "interface_name": "<string>",
  "port_group": 0,
  "security_groups": [
    {
      "id": "ae74714c-c380-48b4-87f8-758d656cdad6"
    }
  ],
  "type": "external"
}
'

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    ddos_profile: {
      profile_template: 123,
      fields: [{base_field: 123, field_value: null, value: '<string>'}],
      profile_template_name: '<string>'
    },
    interface_name: '<string>',
    port_group: 0,
    security_groups: [{id: 'ae74714c-c380-48b4-87f8-758d656cdad6'}],
    type: 'external'
  })
};

fetch('https://api.gcore.com/cloud/v1/instances/{project_id}/{region_id}/{instance_id}/attach_interface', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.gcore.com/cloud/v1/instances/{project_id}/{region_id}/{instance_id}/attach_interface",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'ddos_profile' => [
        'profile_template' => 123,
        'fields' => [
                [
                                'base_field' => 123,
                                'field_value' => null,
                                'value' => '<string>'
                ]
        ],
        'profile_template_name' => '<string>'
    ],
    'interface_name' => '<string>',
    'port_group' => 0,
    'security_groups' => [
        [
                'id' => 'ae74714c-c380-48b4-87f8-758d656cdad6'
        ]
    ],
    'type' => 'external'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

HttpResponse<String> response = Unirest.post("https://api.gcore.com/cloud/v1/instances/{project_id}/{region_id}/{instance_id}/attach_interface")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"ddos_profile\": {\n    \"profile_template\": 123,\n    \"fields\": [\n      {\n        \"base_field\": 123,\n        \"field_value\": null,\n        \"value\": \"<string>\"\n      }\n    ],\n    \"profile_template_name\": \"<string>\"\n  },\n  \"interface_name\": \"<string>\",\n  \"port_group\": 0,\n  \"security_groups\": [\n    {\n      \"id\": \"ae74714c-c380-48b4-87f8-758d656cdad6\"\n    }\n  ],\n  \"type\": \"external\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.gcore.com/cloud/v1/instances/{project_id}/{region_id}/{instance_id}/attach_interface")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"ddos_profile\": {\n    \"profile_template\": 123,\n    \"fields\": [\n      {\n        \"base_field\": 123,\n        \"field_value\": null,\n        \"value\": \"<string>\"\n      }\n    ],\n    \"profile_template_name\": \"<string>\"\n  },\n  \"interface_name\": \"<string>\",\n  \"port_group\": 0,\n  \"security_groups\": [\n    {\n      \"id\": \"ae74714c-c380-48b4-87f8-758d656cdad6\"\n    }\n  ],\n  \"type\": \"external\"\n}"

response = http.request(request)
puts response.read_body

{
  "tasks": [
    "d478ae29-dedc-4869-82f0-96104425f565"
  ]
}