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Last updated on July 14, 2017

OpenX supports real-time bidding via OpenRTB API specification version 2.3 and its dynamic native ads API specification version 1.0. We are in the process of upgrading the OpenX Ad Exchange to support the OpenRTB API specification version 2.5.

You can use the OpenRTB structure and its enumerated values to write applications that bid on ad space in OpenX Ad Exchange and other compatible exchanges and supply sources. Bidders that are already compatible with these versions should be able start using the OpenX OpenRTB implementation with minimal custom integration work.

When participating ad inventoryAd space available on a website or app. The basic unit of inventory for OpenX is an ad unit. becomes available, OpenX sends JSON data in an OpenRTB BidRequest to describe the ad inventory, the user, and other details. Demand partners can send an OpenRTB BidResponse in JSON format and set up optional win notifications and loss notifications.

OpenX provides its publishers with an OpenRTB ad call parameter to send additional data to buyers in each BidRequest. For details, see supplemental data enrichment.

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