Hi, Thank you for contacting the Google Ads API support team.
After reviewing your concern, I understand that you are getting the "OAUTH_TOKEN_HEADER_INVALID" error. It appears that the credentials sent in your HTTP request are not valid, and this is why you have encountered this error. To address this issue, ensure that you have provided the accurate access token linked to your account. To resolve this issue, you should use an access token generated using the same Google Ads account that is associated with the developer token you are using in your request. In other words, the developer token and the access token should be from the same Google Ads account to ensure proper authorization and I highly recommend you to add the correct developer token copied from the API center of your Ads UI and see if it fixes the issue. Also, follow the Prerequisites for service accounts and OAuth Service Account Flow as per your client library. If the issue remains the same, kindly get back to us so that we can investigate the issue further. Thanks, Google Ads API Team Feedback How was our support today? [2025-03-06 04:16:07Z GMT] This message is in relation to case "ref:!00D1U01174p.!5004Q02vH6Wv:ref" (ADR-00291806) -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ 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 "Google Ads API and AdWords 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 visit https://groups.google.com/d/msgid/adwords-api/9Zl-1000000000000000000000000000000000000000000000SSOP6V00-kWqVhbrTReiEo-dt-7n9Q%40sfdc.net.
