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# NSFileProviderServiceSource

A service that provides a custom communication channel between the host app and the File Provider extension.

```
protocol NSFileProviderServiceSource
```

## Overview

To implement a File Provider service, the [`NSFileProviderExtension`](/documentation/FileProvider/NSFileProviderExtension) subclass must override the [`supportedServiceSources(for:)`](/documentation/FileProvider/NSFileProviderExtension/supportedServiceSources(for:)) method and return the supported services.

For more information about creating services, see   <doc://com.apple.documentation/documentation/Foundation/NSFileProviderService>.

## Topics

### Accessing the Service

[`serviceName`](/documentation/FileProvider/NSFileProviderServiceSource/serviceName)

A name that uniquely identifies the service (reverse domain name notation is recommended).

[`makeListenerEndpoint()`](/documentation/FileProvider/NSFileProviderServiceSource/makeListenerEndpoint())

Returns an endpoint object that lets the host app communicate with the File Provider extension.

[`isRestricted`](/documentation/FileProvider/NSFileProviderServiceSource/isRestricted)


---

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