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This page covers steps on viewing and verifying adapters associated with your ad sources.
PrerequisitesBefore you continue, do the following:
You can view a list of all adapters associated with the ad sources configured in your app. To view the list, complete the following steps:
Expand the cards to view initialization statuses and adapter and third-party SDK versions.
If the adapter isn't found or fails to initialize, see Troubleshoot issues found using ad inspector.
View custom event adaptersYou can also view custom event adapters. Custom events lets you set up waterfall mediation for an ad source that AdMob doesn't support. In the adapter list, Custom events are distinct by unique class names. In addition to providing the class name, ad inspector also displays labels assigned to those custom events in the AdMob UI. For more details on custom events, see Setup.
Earlier implementations of custom events, such as prior to the Google Mobile Ads SDK version 20.0.0, can use deprecated subclasses that don't support initialization and return Issue found within ad inspector. If you see the Issue found warning, and your custom event integration works as expected, check if your app is using a deprecated interface and replace the interface with an adapter class. For details, see Adapter
.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-15 UTC.
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