> ## Documentation Index
> Fetch the complete documentation index at: https://docs.appcharge.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Configure the SDK

This guide explains how to configure the Unity Payment Links SDK.

## Step 1 | Locate the Appcharge configuration file

Make sure your Unity project contains the Appcharge configuration file, `AppchargeConfig`, located under `Assets` → `Resources` → `Appcharge`.

<Note> This file defines the connection between your project and Appcharge services, and is required for the SDK to function correctly. </Note>

### If the file doesn’t exist

If the file isn't there, create one manually:

1. Right-click in your Project window.
2. Select `Create` → `Appcharge` → `Configuration` → `AppchargeConfig`.

<Note> This configuration file **must** be located at `Assets` → `Resources` → `Appcharge`. </Note>

### If Unity shows that the file is missing

<img src="https://mintcdn.com/appcharge/pgQNefK6v2mrfKWg/images/sdks/unity/config_missing.png?fit=max&auto=format&n=pgQNefK6v2mrfKWg&q=85&s=3c13eb47d18bd5bbf4bc152e0b1c1aa9" alt="Missing Configurations" width="560" height="146" data-path="images/sdks/unity/config_missing.png" />

If Unity reports that the configuration file is missing, as shown above, fix it using one of the following options:

1. Delete the existing configuration file and re-create it, **or**
2. Select and apply the missing `AppchargeConfig` file.

<img src="https://mintcdn.com/appcharge/pgQNefK6v2mrfKWg/images/sdks/unity/config_fix.png?fit=max&auto=format&n=pgQNefK6v2mrfKWg&q=85&s=e89d891e9d825534e7b6af3dabcc5570" alt="Fix Missing Configurations" width="550" height="522" data-path="images/sdks/unity/config_fix.png" />

## Step 2 | Integrate platform-specific settings

After verifying your configuration file, continue by integrating Appcharge for your target platform. Each platform requires additional settings to ensure Appcharge Payment Links works correctly.

* [Integrate with iOS](/sdks/payment-links/unity/integrate-with-ios).
* [Integrate with Android](/sdks/payment-links/unity/integrate-with-android).