Adsense API returning Error 403 - "The caller does not have permission" about googleads-adsense-examples

[muratarchon]

Hi, I have same error, did you find the solution ?

[dugwood]

@gmehta1996 @muratarchon it seems that you can only use this API using OAuth, not API keys.

Here: https://developers.google.com/adsense/management/reference/rest/v2/accounts/list
When you try the API on the right, and only set API keys, you'll have an error:

"message": "API keys are not supported by this API. Expected OAuth2 access token or other authentication credentials that assert a principal. See https://cloud.google.com/docs/authentication",

So we have to use OAuth2, as in the examples: https://github.com/googleads/googleads-adsense-examples/blob/9f1b24bbfdecf418ee48ce18bc3422aef835a138/v2/php/adsense-sample.php#L114C13-L114C38 (PHP).

It's misleading as the client_id and client_secret are used, but not as API keys: it's for OAuth security.