This page covers steps on viewing and verifying adapters associated with
your ad sources.
Prerequisites
Before you continue, do the following:
Complete all items in the initial
Prerequisites to create an
Ad Manager account, set your test device, initialize Google Mobile Ads SDK,
and install the latest version.
You can also view custom event adapters. Custom events lets you set up
waterfall mediation for an ad source that Ad Manager 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 Ad Manager 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.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["Select platform: [Android](/ad-manager/mobile-ads-sdk/android/ad-inspector/verify-adapter-integrations \"View this page for the Android platform docs.\") [iOS](/ad-manager/mobile-ads-sdk/ios/ad-inspector/verify-adapter-integrations \"View this page for the iOS platform docs.\") [Unity](/ad-manager/mobile-ads-sdk/unity/ad-inspector/verify-adapter-integrations \"View this page for the Unity platform docs.\") [Flutter](/ad-manager/mobile-ads-sdk/flutter/ad-inspector/verify-adapter-integrations \"View this page for the Flutter platform docs.\")\n\n\u003cbr /\u003e\n\nThis page covers steps on viewing and verifying adapters associated with\nyour ad sources.\n\nPrerequisites\n\nBefore you continue, do the following:\n\n- Complete all items in the initial [Prerequisites](/ad-manager/mobile-ads-sdk/android/ad-inspector#prerequisites) to create an Ad Manager account, set your test device, initialize Google Mobile Ads SDK, and install the latest version.\n- [Launch ad inspector](/ad-manager/mobile-ads-sdk/android/ad-inspector/launch-ad-inspector).\n\nYou can view a list of all adapters associated with the ad sources configured\nin your app. To view the list, complete the following steps:\n\n1. In the **Ad inspector** page, click **Adapters**.\n2. Expand the cards to view initialization statuses and adapter and\n third-party SDK versions.\n\n \u003cbr /\u003e\n\nIf the adapter isn't found or fails to initialize, see\n\n[Ad inspector (Beta)](//support.google.com/admanager/answer/7180401#ad-inspector).\n\n\nView custom event adapters\n\nYou can also view custom event adapters. Custom events lets you set up\nwaterfall mediation for an ad source that Ad Manager doesn't support.\nIn the adapter list, Custom events are distinct by unique class names. In\naddition to providing the class name, ad inspector also displays labels\nassigned to those custom events in the Ad Manager UI. For more details\non custom events, see\n\n[Setup](/ad-manager/mobile-ads-sdk/android/custom-events/overview).\n\n\nEarlier implementations of custom events, such as prior to the Google Mobile Ads SDK\nversion\n\n20.0.0,\n\ncan use deprecated subclasses that don't support\ninitialization and return **Issue found** within ad inspector. If you see the\n**Issue found** warning, and your custom event integration works as expected,\ncheck if your app is using a deprecated interface and replace the interface with\nan adapter class. For details, see\n[Adapter](/android/reference/com/google/android/gms/ads/mediation/Adapter)."]]