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# Module Context Object

* `X-PX-risk-rtt` - The time (in ms) it took to make server-to-server call (if one occurred).
* `X-PX-uuid` - The unique identifier of the request.
* `X-PX-data-enrichment` - The HUMAN data enrichment object see [the data enrichment documentation](/applications/data-classification-enrichment) for more information.
* `X-PX-data-enrichment-validated` - A boolean flag indicating whether the data enrichment is signed correctly and was not modified.

To use these headers (or any other HUMAN header), it is recommended to use the `px_custom_pre_clean` subroutine. This subroutine is called just before the HUMAN headers are removed from the request. A user who wants to keep the data from one of these headers, can do so by saving the value on a different, user-defined header.