Google Ads API (opens in a new tab) authentication is based on OAuth 2.0 authorization (opens in a new tab) along with Developer Token (opens in a new tab).

Two methods are supported: OAuth 2.0 and Application Default Credentials.

Note: See the official documentation (opens in a new tab) describing different authorization options.

OAuth 2.0

The following options are available when using OAuth:

• Using an existing access token

  This token should be authorized for https://www.googleapis.com/auth/adwords scope (e.g. by using OAuth 2.0 Playground (opens in a new tab)).

• Using OAuth client ID & client secret

  You can get your own OAuth credentials using this guide (opens in a new tab).

Application Default Credentials

See the official Application Default Credentials guide (opens in a new tab).

Note: You will still need to authorize these credentials for https://www.googleapis.com/auth/adwords scope.

Available options are all the same options described here (opens in a new tab) in detail.