curl --request GET \
  --url https://api.dooki.com.br/v2/{alias}/checkout/payments/{paymentId}/installments \
  --header 'User-Secret-Key: <api-key>' \
  --header 'User-Token: <api-key>'

import requests

url = "https://api.dooki.com.br/v2/{alias}/checkout/payments/{paymentId}/installments"

headers = {
    "User-Token": "<api-key>",
    "User-Secret-Key": "<api-key>"
}

response = requests.get(url, headers=headers)

print(response.text)

const options = {
  method: 'GET',
  headers: {'User-Token': '<api-key>', 'User-Secret-Key': '<api-key>'}
};

fetch('https://api.dooki.com.br/v2/{alias}/checkout/payments/{paymentId}/installments', 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.dooki.com.br/v2/{alias}/checkout/payments/{paymentId}/installments",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "User-Secret-Key: <api-key>",
    "User-Token: <api-key>"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.dooki.com.br/v2/{alias}/checkout/payments/{paymentId}/installments"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("User-Token", "<api-key>")
	req.Header.Add("User-Secret-Key", "<api-key>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://api.dooki.com.br/v2/{alias}/checkout/payments/{paymentId}/installments")
  .header("User-Token", "<api-key>")
  .header("User-Secret-Key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.dooki.com.br/v2/{alias}/checkout/payments/{paymentId}/installments")

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

request = Net::HTTP::Get.new(url)
request["User-Token"] = '<api-key>'
request["User-Secret-Key"] = '<api-key>'

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

{
  "data": {
    "id": 1,
    "payment_id": 2,
    "installment": 1,
    "tax": 1.5,
    "percent_discount": 0,
    "start_at": {
      "date": "2000-08-17 10:24:24",
      "timezone_type": 3,
      "timezone": "America/Sao_Paulo"
    },
    "end_at": {
      "date": "2000-08-17 10:24:24",
      "timezone_type": 3,
      "timezone": "America/Sao_Paulo"
    },
    "created_at": {
      "date": "2000-08-17 10:24:24",
      "timezone_type": 3,
      "timezone": "America/Sao_Paulo"
    },
    "updated_at": {
      "date": "2000-08-17 10:24:24",
      "timezone_type": 3,
      "timezone": "America/Sao_Paulo"
    }
  }
}