title: Gmail API quota usage check
body: <p>We are developing a project working with Gmail API, it might exceed the API limit on this page <a href="https://developers.google.com/gmail/api/v1/reference/quota" rel="nofollow noreferrer">https://developers.google.com/gmail/api/v1/reference/quota</a></p>
  <blockquote>
  <p>API Limit</p>
  <p>Daily Usage    1,000,000,000 quota units per day</p>
  <p>Per User Rate Limit    250 quota units per user per second</p>
  <p>&quot;Exceeding a rate limit will cause an HTTP 403 or HTTP 429 Too Many Requests response and your app should respond by retrying with exponential backoff.&quot;</p>
  </blockquote>
  <ol>
  <li>So we can we make a call from script,  to check the number of API call left before we run the project? Or it can only be seen in google API console in a web page?</li>
  <li>Does the HTTP 403 error bonded to Daily Usage limit and HTTP 429 bonded to User Rate Limit?</li>
  <li>Does the API limit Daily Usage means calendar day?</li>
  </ol>