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

# SDK Initialization

> Initialize the AIR Kit SDK in Web and Flutter apps — create the AirService instance, configure the build environment, and preload wallet and credential modules.

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  <Tab title="Web">
    AIR Kit creates an iframe that loads the login flow and sets up communication streams between the iframe and the DApp's JavaScript context.

    ```js theme={null}
    import { AirService, BUILD_ENV } from "@mocanetwork/airkit";

    const airService = new AirService({
      partnerId: YOUR_PARTNER_ID // Replace with your actual Partner ID
    });
    await airService.init({
      buildEnv: BUILD_ENV.SANDBOX,
      enableLogging: true,
      preloadWallet: true, // Optional: Enable if wallet features will be used
      preloadCredential: true, // Optional: Enable if credential features will be used
      sessionConfig: {
        locale: "en", // Optional: Language code (e.g. "en", "es", ...)
        currency: "USD" // Optional: Display currency (e.g. "EUR", "USD", ...)
      }
    });

    // Without any parameters, this will trigger the default Air login dialog which provides different login methods for the user to choose from.
    await airService.login();
    ```

    Once the SDK is installed and `AirService` is successfully initialized, it can be used to authenticate users.
  </Tab>

  <Tab title="Flutter">
    After installation, the next step to use the AirKit SDK is to create an `AirService` instance and call the `initialize` method.

    The `partnerId` you will receive from us and the `redirectUrl` parameter needs to match the schema discussed in the installation section. It is different for Android and iOS.

    ```dart theme={null}
    Future<void> initialize({
        required String partnerId,
        required GlobalKey<NavigatorState> navigatorKey,
        Environment env = Environment.production,
        bool enableLogging = false,
    })
    ```

    The `partnerId` you will receive from us and the `navigatorKey` parameter is needed to overlay dialogs necessary for specific user flows. During development we recommend using `Environment.sandbox` and enabled logging.

    **Guides:** [Flutter overview](/airkit/flutter/overview) · [Flutter installation](/airkit/flutter/installation) · [Android setup](/airkit/flutter/android-setup) · [iOS setup](/airkit/flutter/ios-setup)

    Minimal pattern:

    ```dart theme={null}
    final navigatorKey = GlobalKey<NavigatorState>();
    final airService = AirService();

    await airService.initialize(
      partnerId: 'YOUR_PARTNER_ID',
      navigatorKey: navigatorKey,
      env: Environment.sandbox,
      enableLogging: true,
    );

    // In MaterialApp: navigatorKey: navigatorKey
    ```
  </Tab>
</Tabs>