Google Apps Script quickstart

Quickstarts explain how to set up and run an app that calls a Google Workspace API.

Google Workspace quickstarts use the API client libraries to handle some details of the authentication and authorization flow. We recommend that you use the client libraries for your own apps. This quickstart uses a simplified authentication approach that is appropriate for a testing environment. For a production environment, we recommend learning about authentication and authorization before choosing the access credentials that are appropriate for your app.

Create a Google Apps Script that makes requests to the Google Tasks API.


  • Create the script.
  • Enable the Google Tasks API.
  • Run the sample.


  • A Google account with Google Tasks enabled.

  • Access to Google Drive

Create the script

  1. Create a new script by going to
  2. Replace the contents of the script editor with the following code:

 * Lists the user's tasks.
 * @see
function listTaskLists() {
  const optionalArgs = {
    maxResults: 10
  try {
    // Returns all the authenticated user's task lists.
    const response = Tasks.Tasklists.list(optionalArgs);
    const taskLists = response.items;
    // Print task list of user if available.
    if (!taskLists || taskLists.length === 0) {
      console.log('No task lists found.');
    for (const taskList of taskLists) {
      console.log('%s (%s)', taskList.title,;
  } catch (err) {
    // TODO (developer) - Handle exception from Task API
    console.log('Failed with error %s', err.message);

  1. Click Save .
  2. Click Untitled project, type Quickstart, and click Rename.

Enable the Google Tasks API

  1. Open the Apps Script project.
  2. Click Editor .
  3. Next to Services, click Add a service .
  4. Select Tasks API and click Add.

Run the sample

In the Apps Script editor, click Run.

The first time you run the sample, it prompts you to authorize access:

  1. Click Review permissions.
  2. Choose an account.
  3. Click Allow.

The script's execution log appears at the bottom of the window.

Next steps