posting through rest api

Hello,

When I do a post request on postman, the contactform7 is working

var data = new FormData();
data.append("your-email", "[email protected]");
data.append("your-name", "fwwfwfwffw");
var xhr = new XMLHttpRequest();
xhr.withCredentials = true;
xhr.addEventListener("readystatechange", function () {
  if (this.readyState === 4) {
    console.log(this.responseText);
  }
});
xhr.open("POST", "https://domain.local/wp-json/contact-form-7/v1/contact-forms/5/feedback");
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhr.setRequestHeader("cache-control", "no-cache");
xhr.setRequestHeader("Postman-Token", "43831d25-f107-4ab9-b5ad-2f9fecdbee78");
xhr.send(data);

Gives me:

{
    "into": "#",
    "status": "mail_sent",
    "message": "Thank you for your message. It has been sent."
}

5, in the url is the ID of my form.
But when I use this within my development site
I got

{"into":"#","status":"validation_failed","message":"One or more fields have an error. Please check and try again.","invalidFields":[{"into":"span.wpcf7-form-control-wrap.your-name","message":"The field is required.","idref":null},{"into":"span.wpcf7-form-control-wrap.your-email","message":"The field is required.","idref":null}]}

Documentation on using contactform7 with the rest api, or plain javascript requests is very hard to find

Thanks