<!--
{
  "availability" : [
    "iOS: 16.0.0 -",
    "iPadOS: 16.0.0 -",
    "macCatalyst: 16.0.0 -",
    "macOS: 13.0.0 -",
    "tvOS: 16.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 9.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "AVFoundation",
  "identifier" : "/documentation/AVFoundation/AVURLAssetHTTPUserAgentKey",
  "metadataVersion" : "0.1.0",
  "role" : "Global Variable",
  "symbol" : {
    "kind" : "Global Variable",
    "modules" : [
      "AVFoundation"
    ],
    "preciseIdentifier" : "c:@AVURLAssetHTTPUserAgentKey"
  },
  "title" : "AVURLAssetHTTPUserAgentKey"
}
-->

# AVURLAssetHTTPUserAgentKey

A key that specifies the user agent of requests that an asset makes.

```
let AVURLAssetHTTPUserAgentKey: String
```

## Discussion

Use this key to set a custom `User-Agent` header on requests that this asset makes. The system uses its default user agent if you don’t specify a value.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)