curl --request POST \
  --url https://v4pay-api.vercel.app/checkout/link/{slug}/pay \
  --header 'Content-Type: application/json' \
  --data '
{
  "customer_name": "Maria Silva",
  "customer_email": "maria@email.com",
  "customer_cpf": "123.456.789-00",
  "customer_phone": "(11) 91234-5678",
  "coupon_code": "BEMVINDO10"
}
'

import requests

url = "https://v4pay-api.vercel.app/checkout/link/{slug}/pay"

payload = {
    "customer_name": "Maria Silva",
    "customer_email": "maria@email.com",
    "customer_cpf": "123.456.789-00",
    "customer_phone": "(11) 91234-5678",
    "coupon_code": "BEMVINDO10"
}
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({
    customer_name: 'Maria Silva',
    customer_email: 'maria@email.com',
    customer_cpf: '123.456.789-00',
    customer_phone: '(11) 91234-5678',
    coupon_code: 'BEMVINDO10'
  })
};

fetch('https://v4pay-api.vercel.app/checkout/link/{slug}/pay', 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://v4pay-api.vercel.app/checkout/link/{slug}/pay",
  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([
    'customer_name' => 'Maria Silva',
    'customer_email' => 'maria@email.com',
    'customer_cpf' => '123.456.789-00',
    'customer_phone' => '(11) 91234-5678',
    'coupon_code' => 'BEMVINDO10'
  ]),
  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://v4pay-api.vercel.app/checkout/link/{slug}/pay"

	payload := strings.NewReader("{\n  \"customer_name\": \"Maria Silva\",\n  \"customer_email\": \"maria@email.com\",\n  \"customer_cpf\": \"123.456.789-00\",\n  \"customer_phone\": \"(11) 91234-5678\",\n  \"coupon_code\": \"BEMVINDO10\"\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://v4pay-api.vercel.app/checkout/link/{slug}/pay")
  .header("Content-Type", "application/json")
  .body("{\n  \"customer_name\": \"Maria Silva\",\n  \"customer_email\": \"maria@email.com\",\n  \"customer_cpf\": \"123.456.789-00\",\n  \"customer_phone\": \"(11) 91234-5678\",\n  \"coupon_code\": \"BEMVINDO10\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://v4pay-api.vercel.app/checkout/link/{slug}/pay")

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  \"customer_name\": \"Maria Silva\",\n  \"customer_email\": \"maria@email.com\",\n  \"customer_cpf\": \"123.456.789-00\",\n  \"customer_phone\": \"(11) 91234-5678\",\n  \"coupon_code\": \"BEMVINDO10\"\n}"

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

{
  "data": {
    "txid": "<string>"
  }
}

{
  "error": {
    "message": "<string>"
  }
}

{
  "error": {
    "message": "<string>"
  }
}