curl --request POST \
  --url https://api-sandbox.vulcanopro.com/api/v1/transfers/reservations/cancel \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --data '
{
  "id": "11111111-1111-1111-1111-111111111111",
  "reason": "guest cancelled"
}
'

const options = {
  method: 'POST',
  headers: {'X-API-KEY': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({id: '11111111-1111-1111-1111-111111111111', reason: 'guest cancelled'})
};

fetch('https://api-sandbox.vulcanopro.com/api/v1/transfers/reservations/cancel', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api-sandbox.vulcanopro.com/api/v1/transfers/reservations/cancel"

payload = {
    "id": "11111111-1111-1111-1111-111111111111",
    "reason": "guest cancelled"
}
headers = {
    "X-API-KEY": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)