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 '
{
  "type": "external",
  "ip_family": "dual",
  "security_groups": [
    {
      "id": "4536dba1-93b1-492e-b3df-270b6b9f3650"
    },
    {
      "id": "cee2ca1f-507a-4a31-b714-f6c1ffb4bdfa"
    }
  ],
  "ddos_profile": {
    "profile_template": 29,
    "fields": []
  }
}
'

import requests

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

payload = {
    "type": "external",
    "ip_family": "dual",
    "security_groups": [{ "id": "4536dba1-93b1-492e-b3df-270b6b9f3650" }, { "id": "cee2ca1f-507a-4a31-b714-f6c1ffb4bdfa" }],
    "ddos_profile": {
        "profile_template": 29,
        "fields": []
    }
}
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    type: 'external',
    ip_family: 'dual',
    security_groups: [
      {id: '4536dba1-93b1-492e-b3df-270b6b9f3650'},
      {id: 'cee2ca1f-507a-4a31-b714-f6c1ffb4bdfa'}
    ],
    ddos_profile: {profile_template: 29, fields: []}
  })
};

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([
    'type' => 'external',
    'ip_family' => 'dual',
    'security_groups' => [
        [
                'id' => '4536dba1-93b1-492e-b3df-270b6b9f3650'
        ],
        [
                'id' => 'cee2ca1f-507a-4a31-b714-f6c1ffb4bdfa'
        ]
    ],
    'ddos_profile' => [
        'profile_template' => 29,
        'fields' => [
                
        ]
    ]
  ]),
  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;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

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

	payload := strings.NewReader("{\n  \"type\": \"external\",\n  \"ip_family\": \"dual\",\n  \"security_groups\": [\n    {\n      \"id\": \"4536dba1-93b1-492e-b3df-270b6b9f3650\"\n    },\n    {\n      \"id\": \"cee2ca1f-507a-4a31-b714-f6c1ffb4bdfa\"\n    }\n  ],\n  \"ddos_profile\": {\n    \"profile_template\": 29,\n    \"fields\": []\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

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  \"type\": \"external\",\n  \"ip_family\": \"dual\",\n  \"security_groups\": [\n    {\n      \"id\": \"4536dba1-93b1-492e-b3df-270b6b9f3650\"\n    },\n    {\n      \"id\": \"cee2ca1f-507a-4a31-b714-f6c1ffb4bdfa\"\n    }\n  ],\n  \"ddos_profile\": {\n    \"profile_template\": 29,\n    \"fields\": []\n  }\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  \"type\": \"external\",\n  \"ip_family\": \"dual\",\n  \"security_groups\": [\n    {\n      \"id\": \"4536dba1-93b1-492e-b3df-270b6b9f3650\"\n    },\n    {\n      \"id\": \"cee2ca1f-507a-4a31-b714-f6c1ffb4bdfa\"\n    }\n  ],\n  \"ddos_profile\": {\n    \"profile_template\": 29,\n    \"fields\": []\n  }\n}"

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

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