JSON request: CORS Access-Control-Allow-Origin header error

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I need to make a JSON request to Payu, but show me the message:

Blocked cross-origin request: Same origin policy (Same Origin Policy) prevents reading the remote resource on https://sandbox.api.payulatam.com/payments-api/4.0/service.cgi?test=false&language=en&command=PING&merchant%5BapiLogin%5D=111111&Merchant%5BapiKey%5D=22222222. (Reason: CORS header 'Access-Control-Allow-Origin' is not present).

JS

    var data = {
        "test": false,
        "language": "en",
        "command": "PING",
        "merchant": {
            "apiLogin": "1111111",
            "apiKey": "22222222"
        }
    };

    $.ajax({
        url: "https://sandbox.api.payulatam.com/payments-api/4.0/service.cgi",
        method: 'GET',
        dataType:'json',
        headers: {
            'Content-Type': 'application/json',
        },
        data: data,
        success: function(data) {
            console.log('ok');

            console.log(data);
        }
    });

I tried to put the following code in the header, but it’s still the same:

'Access-Control-Allow-Origin': '*'

I’ve looked for other similar questions, but none of them helped.

javascript json

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