Hi Amit, Thank you for reaching out to us. I see that you're encountering an Unauthenticated Error. This means that you've supplied invalid authentication credentials to your API call. Could you please follow these steps to obtain the correct client credentials? For your second query, AdWords API and Google Ads API are very similar with a couple of differences. You can read about the migration changes here. For your third query, Google Ads API V3 is a REST type API. Let me know if you have further questions.
Thank you, Bryan, Google Ads API Team ref:_00D1U1174p._5001UXVi3P:ref -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog: https://googleadsdeveloper.blogspot.com/ =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ You received this message because you are subscribed to the Google Groups "AdWords API and Google Ads API Forum" group. To post to this group, send email to adwords-api@googlegroups.com To unsubscribe from this group, send email to adwords-api+unsubscr...@googlegroups.com 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 and Google Ads API Forum" group. To unsubscribe from this group and stop receiving emails from it, send an email to adwords-api+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/adwords-api/5CVIr000000000000000000000000000000000000000000000Q7IB4A005asYrGzvSKCcn3eHilNO1w%40sfdc.net.