Connect to MailJet API with Google Apps Script

The following Google Apps Script can be used to connect to the MailJet API, from where you can then send emails and manage contacts. There is a lot of documentation on how to connect via PHP, Python, Rub, C# etc but nothing suited towards Google Apps Script.

To connect you will need to have a MailJet account and your own API/Secret keys. In this example we will connect with the 'Contact List' aspect of the API. We need to create an encoded string which contains our API keys:

var encoding = Utilities.base64Encode(apiKey + ":" + secretKey);

From here we can set the HTTP headers authentication as part of the request, to authorise our account details:

var options = {
    'headers': {"Authorization": "Basic " + encoding},
  };

Then we can continue with the usual route of using the 'UrlFetchApp' to make the request and return our data.

	/*
	Function to connect with MailJet API.
	*/
	var apiKey = "";
	var secretKey = "";
	function callAPI() {
	var url = "https://api.mailjet.com/v3/REST/contactslist/";
	//set authentication and get apiKeys *************************************
	var encoding = Utilities.base64Encode(apiKey + ":" + secretKey);
	var options = {
	'headers': {"Authorization": "Basic " + encoding},
	};
	//set authentication and get apiKeys *************************************
	// fetch API Url with authentication
	var response = UrlFetchApp.fetch(url, options);
	// log returned Response code to check for errors
	var code = response.getResponseCode();
	Logger.log('Response code is: ' + code);
	// log returned data
	var result = response.getContentText();
	Logger.log(result);
	var text = JSON.parse(result);
	Logger.log(text);
	}

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Connect to MailJet API with Google Apps Script.gs