OpenRTB 2.4

OpenRTB 2.4 is documented only for backward-compatible Nexus integrations. New partners should implement OpenRTB 2.6.

Legacy protocol

OpenRTB 2.4 lacks later privacy, supply-chain, structured user-agent, and video placement improvements. Use it only when the partner contract explicitly requires this version.

The following pages preserve the Nexus request, response, and markup examples for every supported legacy format.

Official reference: IAB Tech Lab OpenRTB 2.4 specification.