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Configure the OAuth consent screen
When you use OAuth 2.0 for authorization, Google displays a consent screen to
the user including a summary of your project, its policies, and the requested
authorization scopes of access. Configuring your app's OAuth consent screen
defines what is displayed to users and app reviewers, and registers your
app so you can publish it later.
Follow the instructions
to configure an OAuth consent screen for your application and add
https://www.googleapis.com/auth/adwords as an OAuth scope.
Create a client ID and client secret
You can skip this step if you're using an existing Google API Console project
that already has a generated client ID and client secret. Otherwise, create a client ID
and client secret by following the
instructions.
You may choose either Desktop app or Web application as the application
type. Once you create the OAuth 2.0 client, download the client's JSON file by
first clicking its Download OAuth client icon and then the DOWNLOAD JSON
button on the following screen.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-03 UTC."],[],[],null,["# Configure the Google API Console project\n\n**Note:** The current step of this tutorial depends on the [type of application](/google-ads/api/docs/get-started/choose-application-type) you are building. We strongly recommend using a service account to make API calls. However, the user authentication option is also provided as an alternative. The rest of this tutorial will be customized based on your choice. \nService accounts User authentication\n\nCreate a service account and key\n--------------------------------\n\n| **Note:** If you are already using another Google API and have created an OAuth 2.0 service account and key, you can skip this step and reuse the existing credentials.\n\nStart by [creating a service account and credentials](/google-ads/api/docs/get-started/choose-application-type).\nNext, [create credentials for the service account](/workspace/guides/create-credentials#service-account).\nDownload the service account key in JSON format and note the service account ID\nand email."]]
