curl --request POST \
  --url https://app.example.com/v1/public/trips/<envelopeId>/cancellation-preview

const response = await fetch("https://app.example.com/v1/public/trips/<envelopeId>/cancellation-preview", {
  method: "POST",
});

const data = await response.json();

import requests

response = requests.post(
    "https://app.example.com/v1/public/trips/<envelopeId>/cancellation-preview"
)

data = response.json()

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://{operatorDomain}/v1/public/trips/{envelopeId}/cancellation-preview",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
]);

$response = curl_exec($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://{operatorDomain}/v1/public/trips/{envelopeId}/cancellation-preview"

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

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://{operatorDomain}/v1/public/trips/{envelopeId}/cancellation-preview")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{operatorDomain}/v1/public/trips/{envelopeId}/cancellation-preview")

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

request = Net::HTTP::Post.new(url)

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

{
  "data": {
    "refundable": 0,
    "penalty": 532000
  }
}

{
  "error": "<string>",
  "code": "<string>",
  "requestId": "<string>",
  "details": {}
}

{
  "error": "<string>",
  "code": "<string>",
  "requestId": "<string>",
  "details": {}
}

{
  "error": "<string>",
  "code": "<string>",
  "requestId": "<string>",
  "details": {}
}