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Why am I getting Google Ads quota errors after a successful login?

Google Ads API requests use both an OAuth access token and a Google Ads developer token. A successful OAuth connection only confirms that the user granted access; it does not mean the developer-token quota is dedicated to your project.

If you use Composio's managed Google Ads connector, requests may use Composio's shared Google Ads developer token. Errors like RESOURCE_EXHAUSTED, rateScope: DEVELOPER, or Number of operations for basic access mean Google is throttling that developer-token quota, even when your connected Google Ads account has low usage.

For a short-term retry, wait for the retry window returned by Google. For production workloads, create a custom Google Ads auth config with your own OAuth client credentials and Google Ads developer token, so quota and access limits are isolated to your Google Ads setup. See custom auth configs.