Hello,
I think for v1 you need to send the authorization headers with the Bearer key.
Try this code. I hope this will work for you 
$.get({
url: "https://api.envato.com/v1/market/total-items.json",
headers: {"Authorization": "Bearer MY_BEARER_API_KEY"}
}).done(function (data) {
console.log(data);
}).fail(function (jqXHR, textStatus) {
alert("error: " + textStatus);
});