curl --request POST \
  --url https://api.example.com/v1/subscriptions \
  --header 'Content-Type: application/json' \
  --data '
{
  "label": "Merchant Subscription 0001",
  "cycle": {
    "unit": "month",
    "interval": 1,
    "day_of_cycle": 1
  },
  "amount": {
    "value": 500000000
  },
  "installments": 1073741823
}
'

import requests

url = "https://api.example.com/v1/subscriptions"

payload = {
    "label": "Merchant Subscription 0001",
    "cycle": {
        "unit": "month",
        "interval": 1,
        "day_of_cycle": 1
    },
    "amount": { "value": 500000000 },
    "installments": 1073741823
}
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({
    label: 'Merchant Subscription 0001',
    cycle: {unit: 'month', interval: 1, day_of_cycle: 1},
    amount: {value: 500000000},
    installments: 1073741823
  })
};

fetch('https://api.example.com/v1/subscriptions', 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/v1/subscriptions",
  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([
    'label' => 'Merchant Subscription 0001',
    'cycle' => [
        'unit' => 'month',
        'interval' => 1,
        'day_of_cycle' => 1
    ],
    'amount' => [
        'value' => 500000000
    ],
    'installments' => 1073741823
  ]),
  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/v1/subscriptions"

	payload := strings.NewReader("{\n  \"label\": \"Merchant Subscription 0001\",\n  \"cycle\": {\n    \"unit\": \"month\",\n    \"interval\": 1,\n    \"day_of_cycle\": 1\n  },\n  \"amount\": {\n    \"value\": 500000000\n  },\n  \"installments\": 1073741823\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/v1/subscriptions")
  .header("Content-Type", "application/json")
  .body("{\n  \"label\": \"Merchant Subscription 0001\",\n  \"cycle\": {\n    \"unit\": \"month\",\n    \"interval\": 1,\n    \"day_of_cycle\": 1\n  },\n  \"amount\": {\n    \"value\": 500000000\n  },\n  \"installments\": 1073741823\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/v1/subscriptions")

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  \"label\": \"Merchant Subscription 0001\",\n  \"cycle\": {\n    \"unit\": \"month\",\n    \"interval\": 1,\n    \"day_of_cycle\": 1\n  },\n  \"amount\": {\n    \"value\": 500000000\n  },\n  \"installments\": 1073741823\n}"

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

{
  "subscription": {
    "id": "<string>",
    "label": "<string>",
    "cycle": {
      "unit": "month",
      "interval": 1,
      "day_of_cycle": 1
    },
    "amount": {
      "value": 500000000
    },
    "installments": 1073741823
  },
  "request_id": "000000000000000000000",
  "errors": [
    {
      "type": "<string>",
      "message": null
    }
  ]
}

{
  "errors": [
    {
      "type": "<string>",
      "message": null
    }
  ],
  "request_id": "000000000000000000000"
}