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

# Capture a variant's settings and stop the A/B test

> Captures the settings of the given variant and of the control, then stops the A/B test.

**Required ACL:** `analytics`, `editSettings`

The captured settings can later be applied to the control index with the `applyVariantSettings` operation, and read back with the `getABTestSettings` operation.

The A/B test must have reached 80% of its planned duration. Earlier requests return `400`.

Settings can only be captured once per A/B test. A second request returns `409`.

`synonyms` and `enableRules` are not captured, so applying the captured settings never changes them on the control index.

## Usage

```cs C# theme={"system"}
// Initialize the client
var client = new AbtestingV3Client(
  new AbtestingV3Config(
    "ALGOLIA_APPLICATION_ID",
    "ALGOLIA_API_KEY",
    "ALGOLIA_APPLICATION_REGION"
  )
);

// Call the API
await client.SaveVariantSettingsAsync(
  42,
  2,
  new SaveSettingsRequest { SaveFeaturesSettings = true }
);
```

```dart Dart theme={"system"}
// Initialize the client
final client = AbtestingV3Client(
    appId: 'ALGOLIA_APPLICATION_ID',
    apiKey: 'ALGOLIA_API_KEY',
    region: 'ALGOLIA_APPLICATION_REGION');

// Call the API
await client.saveVariantSettings(
  id: 42,
  variantId: 2,
  saveSettingsRequest: SaveSettingsRequest(
    saveFeaturesSettings: true,
  ),
);
```

```go Go theme={"system"}
// Initialize the client with your application region, eg. abtestingV3.ALGOLIA_APPLICATION_REGION
client, err := abtestingV3.NewClient("ALGOLIA_APPLICATION_ID", "ALGOLIA_API_KEY", abtestingV3.US)
if err != nil {
  // The client can fail to initialize if you pass an invalid parameter.
  panic(err)
}

// Call the API
err = client.SaveVariantSettings(client.NewApiSaveVariantSettingsRequest(
  42, 2,
  abtestingV3.NewEmptySaveSettingsRequest().SetSaveFeaturesSettings(true)))
if err != nil {
  // handle the eventual error
  panic(err)
}
```

```java Java theme={"system"}
// Initialize the client
AbtestingV3Client client = new AbtestingV3Client("ALGOLIA_APPLICATION_ID", "ALGOLIA_API_KEY", "ALGOLIA_APPLICATION_REGION");

// Call the API
client.saveVariantSettings(42, 2, new SaveSettingsRequest().setSaveFeaturesSettings(true));
```

```js JavaScript theme={"system"}
// Initialize the client
// Replace 'us' with your Algolia Application Region
const client = algoliasearch('ALGOLIA_APPLICATION_ID', 'ALGOLIA_API_KEY').initAbtestingV3({ region: 'us' });

// Call the API
await client.saveVariantSettings({ id: 42, variantId: 2, saveSettingsRequest: { saveFeaturesSettings: true } });
```

```kotlin Kotlin theme={"system"}
// Initialize the client
val client =
  AbtestingV3Client(
    appId = "ALGOLIA_APPLICATION_ID",
    apiKey = "ALGOLIA_API_KEY",
    region = "ALGOLIA_APPLICATION_REGION",
  )

// Call the API
client.saveVariantSettings(
  id = 42,
  variantId = 2,
  saveSettingsRequest = SaveSettingsRequest(saveFeaturesSettings = true),
)
```

```php PHP theme={"system"}
// Initialize the client
$client = AbtestingV3Client::create('ALGOLIA_APPLICATION_ID', 'ALGOLIA_API_KEY', 'ALGOLIA_APPLICATION_REGION');

// Call the API
$client->saveVariantSettings(
    42,
    2,
    ['saveFeaturesSettings' => true,
    ],
);
```

```python Python theme={"system"}
# Initialize the client
# In an asynchronous context, you can use AbtestingV3Client instead, which exposes the exact same methods.
client = AbtestingV3ClientSync(
    "ALGOLIA_APPLICATION_ID", "ALGOLIA_API_KEY", "ALGOLIA_APPLICATION_REGION"
)

# Call the API
client.save_variant_settings(
    id=42,
    variant_id=2,
    save_settings_request={
        "saveFeaturesSettings": True,
    },
)
```

```ruby Ruby theme={"system"}
# Initialize the client
client = Algolia::AbtestingV3Client.create("ALGOLIA_APPLICATION_ID", "ALGOLIA_API_KEY", "ALGOLIA_APPLICATION_REGION")

# Call the API
client.save_variant_settings(42, 2, Algolia::AbtestingV3::SaveSettingsRequest.new(save_features_settings: true))
```

```scala Scala theme={"system"}
// Initialize the client
val client = AbtestingV3Client(
  appId = "ALGOLIA_APPLICATION_ID",
  apiKey = "ALGOLIA_API_KEY",
  region = Option("ALGOLIA_APPLICATION_REGION")
)

// Call the API
Await.result(
  client.saveVariantSettings(
    id = 42,
    variantId = 2,
    saveSettingsRequest = SaveSettingsRequest(
      saveFeaturesSettings = Some(true)
    )
  ),
  Duration(100, "sec")
)
```

```swift Swift theme={"system"}
// Initialize the client
let client = try AbtestingV3Client(appID: "ALGOLIA_APPLICATION_ID", apiKey: "ALGOLIA_API_KEY", region: .us)

// Call the API
try await client.saveVariantSettings(
    id: 42,
    variantId: 2,
    saveSettingsRequest: SaveSettingsRequest(saveFeaturesSettings: true)
)
```

> **[See the full API reference](https://www.algolia.com/doc/rest-api/abtesting-v3/save-variant-settings.md)**
>
> For more details about input parameters
> and response fields.