RE: developer token not allowed in project after migration

[Google Ads API Forum Advisor]

Hi,

Thank you for contacting the Google Ads API support team.

Based on the provided information, I understand that you are getting the DEVELOPER_TOKEN_PROHIBITED error. This error indicates that you have used another developer token to make API calls along with the OAuth2 credentials associated with Google API Console project having Id like “81638XXXXX”. Kindly note that each Google API Console project can be associated with the developer token for only one manager account. Once you make a Google Ads API request, the developer token is permanently paired to the Google API Console project. If you try to use another developer token for the same project, you'll get a DEVELOPER_TOKEN_PROHIBITED error when making a request. As your Google API Console project “81638XXXXX” is already associated with the developer token of the account MCC Country, using any other developer token will provide a DEVELOPER_TOKEN_PROHIBITED error.

The solution for resolving this error is to create a new Google Cloud Console Project and generate new OAuth2 credentials under the new Project. Then you can make API calls with the new OAuth2 credentials and the developer token of the account MCC Regional. Also, please ensure to have the correct access level to the Google Ads account that you are accessing.

I hope this clarifies your concern. Feel free to reach out for any further concerns/ queries.

Thanks,
 

Google Ads API Team

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[2025-09-22 20:42:14Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01u7D4a:ref" (ADR-00333413)