Refreshing Access Token
Access tokens expire after an hour of generation. To generate a new access token, use the refresh token you generated earlier.
Note:
You must use your domain-specific Zoho Accounts URL to refresh your access token.
For US: https://accounts.zoho.com
For AU: https://accounts.zoho.com.au
For EU: https://accounts.zoho.eu
For IN: https://accounts.zoho.in
For CN: https://accounts.zoho.com.cn
Make a POST request with the following URL:
{Accounts_URL}/oauth/v2/token?refresh_token={refresh_token}&client_id={client_id}&client_secret={client_secret}&grant_type=refresh_token
If the request is successful, you will receive the following response.
{ "access_token": "{new_access_token}", "expires_in": 3600, "api_domain": "https://www.zohoapis.com", "token_type": "Bearer" }