> For the complete documentation index, see [llms.txt](https://docs.digitalturbine.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.digitalturbine.com/dt-ads-demand/dt-exchange-demand.md).

# DT Exchange Demand

DT Exchange Demand is a portal that allows you to integrate as an RTB Bidder and participate in real-time bidding for ad inventory.

For more information, see the [DT Exchange](https://www.digitalturbine.com/dt-exchange) product page and contact DT to confirm your eligibility.

## Technical Specifications <a href="#h_01jqkbks5g46tjwc4w3x7exzt6" id="h_01jqkbks5g46tjwc4w3x7exzt6"></a>

* Data Center Location: The DT data center is in Virginia (US-East in AWS).
* Timeout: 350ms for responding with an ad.
* OpenRTB Version: DT supports [OpenRTB API Specification Version 2.5](https://www.iab.com/wp-content/uploads/2016/03/OpenRTB-API-Specification-Version-2-5-FINAL.pdf). For more information, see [DT Exchange OpenRTB 2.5 Specs](https://gitlab.com/digitalturbine/dt-developer-portal/gitbook/-/blob/main/14_exchange_dsp/dt-exchange-openrtb-2.5-specs).
* Impression Counting: DT counts display impressions when at least one pixel is visible to the user. Video impressions are calculated according to the standard VAST protocol.


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