curl --request POST \
  --url https://bouclay.com/api/v1/subscriptions/{subscription}/items/{item}/preview \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Idempotency-Key: <idempotency-key>' \
  --data '
{
  "quantity": 500,
  "priceId": "<string>",
  "remove": true
}
'

const options = {
  method: 'POST',
  headers: {
    'Idempotency-Key': '<idempotency-key>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({quantity: 500, priceId: '<string>', remove: true})
};

fetch('https://bouclay.com/api/v1/subscriptions/{subscription}/items/{item}/preview', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://bouclay.com/api/v1/subscriptions/{subscription}/items/{item}/preview"

payload = {
    "quantity": 500,
    "priceId": "<string>",
    "remove": True
}
headers = {
    "Idempotency-Key": "<idempotency-key>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://bouclay.com/api/v1/subscriptions/{subscription}/items/{item}/preview",
  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([
    'quantity' => 500,
    'priceId' => '<string>',
    'remove' => true
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "Idempotency-Key: <idempotency-key>"
  ],
]);

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

curl_close($curl);

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

{
  "data": {
    "object": "subscription_item_change_preview",
    "behavior": "always",
    "billsNow": true,
    "isCredit": true,
    "currency": "<string>",
    "credit": {
      "amount": 1,
      "destination": "balance"
    },
    "lines": [
      {
        "description": "<string>",
        "amount": 1
      }
    ],
    "totals": {
      "subtotal": 1,
      "discountTotal": 1,
      "grantApplied": 1,
      "taxTotal": 1,
      "total": 1,
      "balanceApplied": 123,
      "amountDue": 1
    }
  },
  "meta": {
    "requestId": "req_550e8400-e29b-41d4-a716-446655440000"
  }
}

{
  "error": {
    "type": "request_error",
    "code": "authentication_failed",
    "detail": "<string>",
    "errors": [
      {
        "field": "<string>",
        "message": "<string>"
      }
    ]
  },
  "meta": {
    "requestId": "req_550e8400-e29b-41d4-a716-446655440000"
  }
}