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# url

The URL of the link that launched the App Clip.

```
var url: URL? { get }
```

## Discussion

Use `url` to retrieve data that’s passed to an App Clip on launch, and use the data to update the user interface of the App Clip.

The value of `url` is the same as the <doc://com.apple.documentation/documentation/Foundation/NSUserActivity> <doc://com.apple.documentation/documentation/Foundation/NSUserActivity/webpageURL> property. If you don’t need to verify the user’s location when they launch your App Clip, use `webpageURL` instead.

For more information, see [Responding to invocations](/documentation/AppClip/responding-to-invocations).

---

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