webdataconnector | Bring the data you care about into Tableau | Dashboard library

Keep an array containing all the urls that you need to fetchs.

urls = [
    'http://url/api/opls/number1/tasks?apiKey1',
    'http://url/api/opls/number2/tasks?apiKey2', 
    'http://url/api/opls/number3/tasks?apiKey3'
];

Then iterate over the array and send an ajax request on each url.

urls.forEach(function(url) {
  $.getJSON(url, function(resp) {        
    var feat = resp.data,
    let data = [];

    // Iterate over the JSON object
    var keys = Object.keys(feat);
    for (var i = 0, len = keys.length; i < len; i++) {
        data.push({
            "taskId": feat[keys[i]].taskId,
            "owner": feat[keys[i]].owner,
            "description": feat[keys[i]].description,
            "responsible": feat[keys[i]].responsible,                     
        });
    }

    table.appendRows(data);
    doneCallback();
  });
});