# MediaPackage response headers
<a name="response-headers"></a>

Use the following AWS Elemental MediaPackage response headers to help you build your workflows. For more information about response headers associated with manifest monitoring, see [Monitoring manifest update time](https://docs.aws.amazon.com/mediapackage/latest/userguide/monitoring-manifest-last-updated.html).


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| Header name | Value | Description | 
| --- | --- | --- | 
| `CMSD-Static` | For accepted key/value pairs, see [CMSD headers from AWS Elemental MediaPackage](cmsd.md). | A variety of Common Media Server Data (CMSD) information about the manifests and segment response objects.  | 
| `X-Amzn-Mediapackage-Active-Input` | `1` or `2` | The active input pipeline when MediaPackage serves a given media segment. | 
| `X-Amzn-Mediapackage-Channel-Id` | The channel-name value in the API. | Use separately from, or in addition to, `X-Amzn-MediaPackage-Channel-UniqueId`, to identify a given channel in the CDN logs. Channel names are unique only within a given region. | 
| `X-Amzn-Mediapackage-Channel-UniqueId` | The unique identifier of the channel. | Use separately from, or in addition to, `X-Amzn-MediaPackage-Channel-Id`, to identify a given channel in the CDN logs. Channel names are unique only within a given region. Using `X-Amzn-Mediapackage-Channel-UniqueId` is also helpful for support requests. | 
| `X-Amzn-Mediapackage-Endpoint-Id` | The manifest-name value in the API. | Use separately from, or in addition to, `X-Amzn-Mediapackage-Endpoint-UniqueId`, to identify a given endpoint in the CDN logs. Endpoint names are unique only within a given channel and region. | 
| `X-Amzn-Mediapackage-Endpoint-UniqueId` | The unique identifier of the endpoint. | Use separately from, or in addition to, `X-Amzn-MediaPackage-Endpoint-Id`, to identify a given endpoint in the CDN logs. Endpoint names are unique only within a given channel and region. Using `X-Amzn-Mediapackage-Endpoint-UniqueId` is also helpful for support requests. | 
| `X-Amzn-RequestId` | The unique identifier of the request. | Equivalent to `X-Amzn-MediaPackage-Request-Id` in MediaPackage V1. Using `X-Amzn-RequestId` is helpful for support requests. |