Get auth token to OAuth 2.0 for Sevice Accounts

Usage no npm install needed!

<script type="module">
  import easyGoogleToken from 'https://cdn.skypack.dev/easy_google_token';


Easy Google Token

Easy Google Token is a easy way to get a token with a Service Account File

*You could use it in the Backend to get a token and use it in the Frontend or you could create a file with limited access to use it in the Frontend but I recommend the first option


Using npm:

$ npm install easy_google_token


You can check the Google scopes HERE

# file: Json File with the service credentials
# scopes: String (scopes separated by comma)
# callback_function: function that will be executed when you receive the token

EasyGoogleToken.getTokenWithServiceAccountFile(file, scopes , callback_function);


const creds = require('./service_account_file.json');
const scopes = 'https://www.googleapis.com/auth/dialogflow'
EasyGoogleToken.getTokenWithServiceAccountFile(creds, scopes, (response) => { console.log(response.data.access_token); });

Example with Dialog Flow and Axios

const axios = require('axios');

function sendMessage(message){
  const projectId = 'project-id';
  const session = 'random-session'
  const data = { 'queryInput': { 'text': { 'text': message, 'languageCode': 'es' } } };
  const url = `https://content-dialogflow.googleapis.com/v2/projects/${projectId}/agent/sessions/${session}:detectIntent`;
  const token = window.googleToken;

  const config = {
    headers: {
      'Authorization': `Bearer ${token}`,
      'Accept': 'application/json',
      'Content-Type': 'application/json'

  return axios.post(url, data, config).then((res) => {
    res.data.queryResult.fulfillmentMessages.forEach((msg) => {

EasyGoogleToken.getTokenWithServiceAccountFile(creds, 'https://www.googleapis.com/auth/dialogflow', function(response) {
  window.googleToken = response.data.access_token;
  sendMessage("Hello !");