"error": "invalid_client", "error_description": "Unauthorized"

[pqm peng]

response:

{

    "error": "invalid_client",

    "error_description": "Unauthorized"

}

follow example: Generating new access tokens

Once you have a client ID, client secret, and refresh token, you can generate a new access token for use in API calls with the curl command line tool:

Note: The version v3 in the OAuth endpoint URL is unrelated to the Google Ads API version and should not change when migrating to newer versions of Google Ads API.

curl \
  --data "grant_type=refresh_token" \
  --data "client_id=CLIENT_ID" \
  --data "client_secret=CLIENT_SECRET" \
  --data "refresh_token=REFRESH_TOKEN" \
  https://www.googleapis.com/oauth2/v3/token

[Google Ads API Forum Advisor]

Hi,

I'm from the Google Ads API support team.

It appears that you’ve received the ‘invalid_client’ error. I suggest to recreate the client id and client secret and generate a refresh token using the new client id and client secret key. You may refer to the web app flow instructions (https://developers.google.com/identity/protocols/oauth2/web-server#obtainingaccesstokens) in this OAuth2.0 guide (https://developers.google.com/google-ads/api/rest/auth#using_desktop_or_web_app_flows) for the complete instructions.

Should you continue to encounter issues with the OAuth credentials in your client library, even after following the steps from the above guide, I would recommend that you reach out instead to the Google API Console Support team via this link (https://support.google.com/googleapi/answer/7014572?hl=en).

Regards,

Google Ads API Team

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