This is one example that use Google Apps Script implemented as executable API to send emails through Gmail API.

Send emails with Google Script API is much easier than a classic method.

####How to: To use it, simply:

• Create a project on Google Developers Console enabling the Gmail and Google Script Execution API. Then extract the client ID and paste it on:

var CLIENT_ID = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX';

• Create a Google Script file on Google Apps Script. The Google Script code used is:

function myFunction(email, subject, text) {  
    GmailApp.sendEmail(email, subject, text);
    return ['Email sent'];  
}

• Then, implement it as a executable API, extract the script ID and paste it on:

var scriptId = "XXXXXXXXXXXXXXXXXXXXXXXXXXXX";

####Run To run, use your favorite server or simply type:

python -m SimpleHTTPServer

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Sorry if my English had mistakes, isn't my first language.