We are getting a 400 error for this request, what could be the reason?

URL: https://xpay.nexigroup.com/api/phoenix-0.0/psp/api/v1/orders/hpp

Code example
Request

{
  "Order": {

The cause of the error in this case is that the parameters all start with an uppercase letter. Request parameters are case-sensitive, which is why the error is returned.

For this scenario as well, the error received is a 400 because an incorrect request was sent.

In this case, the correct request should be like this:

Code example
{
  "order": {
    "currency": "EUR",
    "orderId": "7008492",