curl --request POST \
  --url https://api.example.com/cabinet/landing/{slug}/purchase \
  --header 'Content-Type: application/json' \
  --data '
{
  "tariff_id": 123,
  "period_days": 123,
  "contact_type": "<string>",
  "contact_value": "<string>",
  "payment_method": "<string>",
  "is_gift": false,
  "gift_recipient_type": "<string>",
  "gift_recipient_value": "<string>",
  "gift_message": "<string>"
}
'

import requests

url = "https://api.example.com/cabinet/landing/{slug}/purchase"

payload = {
    "tariff_id": 123,
    "period_days": 123,
    "contact_type": "<string>",
    "contact_value": "<string>",
    "payment_method": "<string>",
    "is_gift": False,
    "gift_recipient_type": "<string>",
    "gift_recipient_value": "<string>",
    "gift_message": "<string>"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    tariff_id: 123,
    period_days: 123,
    contact_type: '<string>',
    contact_value: '<string>',
    payment_method: '<string>',
    is_gift: false,
    gift_recipient_type: '<string>',
    gift_recipient_value: '<string>',
    gift_message: '<string>'
  })
};

fetch('https://api.example.com/cabinet/landing/{slug}/purchase', 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.example.com/cabinet/landing/{slug}/purchase",
  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([
    'tariff_id' => 123,
    'period_days' => 123,
    'contact_type' => '<string>',
    'contact_value' => '<string>',
    'payment_method' => '<string>',
    'is_gift' => false,
    'gift_recipient_type' => '<string>',
    'gift_recipient_value' => '<string>',
    'gift_message' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "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.example.com/cabinet/landing/{slug}/purchase"

	payload := strings.NewReader("{\n  \"tariff_id\": 123,\n  \"period_days\": 123,\n  \"contact_type\": \"<string>\",\n  \"contact_value\": \"<string>\",\n  \"payment_method\": \"<string>\",\n  \"is_gift\": false,\n  \"gift_recipient_type\": \"<string>\",\n  \"gift_recipient_value\": \"<string>\",\n  \"gift_message\": \"<string>\"\n}")

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

	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.example.com/cabinet/landing/{slug}/purchase")
  .header("Content-Type", "application/json")
  .body("{\n  \"tariff_id\": 123,\n  \"period_days\": 123,\n  \"contact_type\": \"<string>\",\n  \"contact_value\": \"<string>\",\n  \"payment_method\": \"<string>\",\n  \"is_gift\": false,\n  \"gift_recipient_type\": \"<string>\",\n  \"gift_recipient_value\": \"<string>\",\n  \"gift_message\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/cabinet/landing/{slug}/purchase")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"tariff_id\": 123,\n  \"period_days\": 123,\n  \"contact_type\": \"<string>\",\n  \"contact_value\": \"<string>\",\n  \"payment_method\": \"<string>\",\n  \"is_gift\": false,\n  \"gift_recipient_type\": \"<string>\",\n  \"gift_recipient_value\": \"<string>\",\n  \"gift_message\": \"<string>\"\n}"

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

{
  "purchase_token": "<string>",
  "payment_url": "<string>"
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}