No matching client found for package name

🕒 Estimated Reading: 1 minutes
📂 Location: Common Errors → No Matching Client Found for Package Name

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❗ Error Overview

If you encounter the error message:
“No matching client found for package name”
it means that the package name specified in your google-services.json file does not match the applicationId in your app’s build.gradle file.

This mismatch prevents Firebase from correctly identifying your application, resulting in a configuration error.

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🛠️ Reason

Firebase requires the package name (package_name) in the google-services.json file to exactly match the applicationId defined in your Android project’s build.gradle file.

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✅ How to Fix It (Step-by-Step)

Follow these steps to resolve the issue:

1. Open the google-services.json file, which is typically located in the android/app directory of your Flutter project.
2. Look for the package_name field in the google-services.json file. This should match the package name you intend to use for your application.
3. Next, open the build.gradle file in the android/app directory of your project.
4. Find the build.gradle file, locate the defaultConfig section. Inside this section:
   defaultConfig {applicationId “com.example.yourapp”}
   → Ensure the applicationId exactly matches the package_name from google-services.json.
5. If the values do not match, do one of the following:
   • Update the applicationId in build.gradle
     OR
   • Update the google-services.json from Firebase Console with the correct package_name.
6. Save the changes made to both files.
7. Clean and rebuild the project by running these commands in your terminal:
   • flutter clean
   • flutter run

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🔍 Reference

For more information, visit the official Firebase Configuration Guide

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✅ Following the above steps will resolve the mismatch error and let Firebase recognize your app correctly.