supabase/apps/docs/docs/reference/dart/initializing.mdx

---
id: initializing
title: 'Initializing'
slug: initializing
---

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import TabItem from '@theme/TabItem'

## Flutter

For `supabase-flutter`, you will be using the static `initialize()` method on `Supabase` class.

### Flutter `initialize()`

```dart title=main.dart
Future<void> main() async {
  await Supabase.initialize(url: 'https://xyzcompany.supabase.co', anonKey: 'public-anon-key');
  runApp(MyApp());
}
```

### Access `SupabaseClient` instance

Once you initialize Supabase in your `main()` method, you can access the `SupabaseClient` instance from anywhere in your app.

```dart
final supabase = Supabase.instance.client;
```

### Call `initialize()` with custom headers

You can pass `headers` to initialize your Supabase client with customer headers. 
Here is an example of passing a custom auth header to Supabase client.
```dart title=main.dart
Future<void> main() async {
  await Supabase.initialize(
    url: 'https://xyzcompany.supabase.co',
    anonKey: 'public-anon-key',
    headers: {
      'Authorization': 'Bearer $accessToken',
    },
  );
  runApp(const MyApp());
}
```

### Call `initialize()`multiple times

You can initialize Supabase multiple times in your app. When doing so, call `dispose()` each time before you initialize again.

```dart
Supabase.instance.dispose();

await Supabase.initialize(url: 'https://xyzcompany.supabase.co', anonKey: 'public-anon-key');
```

## Other Dart Projects

You can initialize a new Supabase client using the `SupabaseClient()` method.

The Supabase client is your entrypoint to the rest of the Supabase functionality
and is the easiest way to interact with everything we offer within the Supabase ecosystem.

### Dart `SupabaseClient()`

```dart
final supabase = SupabaseClient('https://xyzcompany.supabase.co', 'public-anon-key');
```