Hi Subin, The "invalid_grant" error usually indicates that the access or refresh token being passed in your request is incorrect or invalid.
To verify that your credentials are correct, you could also try the CURL request provided below and see if you are able to generate the access tokens? If the credentials are correct, you should get an access token for the below request. curl https://www.googleapis.com/oauth2/v4/token \ -d refresh_token=your-refresh_token \ -d client_id=your-client-id \ -d client_secret=your-client-secret \ -d grant_type=refresh_token If your credentials are incorrect and still facing an issues then could you generate a new refresh token with the help of this guide <https://developers.google.com/adwords/api/docs/guides/first-api-call#get_an_oauth2_refresh_token_and_configure_your_client> and retry your request? Let me know if the issue persists. Thanks, Milind, AdWords API Team. -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog and Google+: https://googleadsdeveloper.blogspot.com/ https://plus.google.com/+GoogleAdsDevelopers/posts =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ You received this message because you are subscribed to the Google Groups "AdWords API Forum" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/adwords-api?hl=en --- You received this message because you are subscribed to the Google Groups "AdWords API Forum" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/adwords-api. To view this discussion on the web visit https://groups.google.com/d/msgid/adwords-api/8051edd9-d690-417e-9319-06cba3112f6a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
