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Using the Refresh Token for Google Calendar Events

This document explains how to use a refresh token from the Google OAuth flow to access and request events from the Google Calendar API.

Overview​

Once you have obtained a refresh token via Google OAuth, you can request a new access token when needed. This access token is then used to call the Google Calendar API to retrieve events.

Steps​

  1. Obtain the Refresh Token
    Ensure that the initial OAuth flow requested offline access so that a refresh token is received.

  2. Exchange Refresh Token for an Access Token
    Make a POST request to Google's token endpoint.

  3. Access the Google Calendar API
    Use the new access token to query calendar events.

Example Token Exchange Request​

curl --request POST \
  --url https://oauth2.googleapis.com/token \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data 'client_id=YOUR_CLIENT_ID&client_secret=YOUR_CLIENT_SECRET&refresh_token=YOUR_REFRESH_TOKEN&grant_type=refresh_token'

Further Resources​