Pastebin.com Post

I'm trying to post a new Pastebin through a popup window in Javascript. The issues I'm getting is it is saying "Bad API request, invalid api_option"

Link that I'm using: http://pastebin.com/api/api_post.php?api_dev_key=<KEY>&api_paste_name=T‌​ITLE&api_option=paste&api_paste_code=SOMETEXT

It says to put api_option as paste. I've tried looking up other examples, but no luck yet. Has everyone ran into this problem?

Are you, by any chance, required to POST the data rather than GETting it?

Also, it might not be the best idea ever to put your API key on the internet like this.

How are you submitting this request to Pastebin? Is it via POST or GET? My best guess is that you're sending a GET request and the API requires a POST.

Try this:

   let api = {
      option: "paste",
      user_key: "XXXXXXXXXXXX",
      dev_key: 'XXXXXXXXXXXX',
      paste_name: "MyTitle",
      paste_format: "JSON",
      paste_private: 0,
      paste_code: ""
};

  let request = new XMLHttpRequest();
  request.open('POST', 'http://pastebin.com/api/api_post.php', true);
  request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
  data['test'] = 'Yeah PasteBin!';
  dataString = 'api_option='+api.option+'&api_user_key='+api.user_key+'&api_dev_key='+api.dev_key+
'&api_paste_name='+api.paste_name+'&api_paste_format='+api.paste_format+
'&api_paste_private='+api.paste_private+'&api_paste_code='+data;
request.onreadystatechange = function() {
    if (request.status == 200 && request.readyState == 4) {
        alert("URL to new pastebin file: " + request.responseText);
    }
}
  request.send(dataString);

The main issue with your code is put everything in your request URL, what is fine if it is a GET request. The URL of PasteBin: api/api_post.php demands a POST request (notice the name?), so you have to send it in the body like I've shown you above.