curl --request POST \
  --url https://mail-service.iran.liara.ir/api/v1/mails/{mailServerID}/plan \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "planName": "m3"
}
'

import requests

url = "https://mail-service.iran.liara.ir/api/v1/mails/{mailServerID}/plan"

payload = { "planName": "m3" }
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({planName: 'm3'})
};

fetch('https://mail-service.iran.liara.ir/api/v1/mails/{mailServerID}/plan', 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://mail-service.iran.liara.ir/api/v1/mails/{mailServerID}/plan",
  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([
    'planName' => 'm3'
  ]),
  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://mail-service.iran.liara.ir/api/v1/mails/{mailServerID}/plan"

	payload := strings.NewReader("{\n  \"planName\": \"m3\"\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://mail-service.iran.liara.ir/api/v1/mails/{mailServerID}/plan")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"planName\": \"m3\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://mail-service.iran.liara.ir/api/v1/mails/{mailServerID}/plan")

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  \"planName\": \"m3\"\n}"

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

This response has no body data.

This response has no body data.

This response has no body data.

This response has no body data.

This response has no body data.

This response has no body data.

This response has no body data.