App S2S OpenRTB (Legacy) - Notifications

Win notifications must be triggered server-side to notify Criteo of a win.

For information, if necessary, the notification of a win can also be done using lurl with the ${AUCTION_LOSS} macro replaced by 0.

For a better flexibility, Criteo supports two ways of implementing bid loss notifications:

HTTP GET CALL

For each impression, Criteo can send an optional field lurl in the bid response which contains a bid loss URL with all the required parameters. Then you just need to call this url after replacing the following macros:

• The status macro ${AUCTION_LOSS}

• The winning bid macro: ${WINNING_BID}

• The clearing price macro: ${CLEARING_PRICE}

As mentioned earlier, one of the goals of bid loss notifications is to help in real time monitoring and quickly detect creative or technical issues when they occur. This is why we require that the latency between a bid request and its corresponding notifications to be less than 60 seconds

In some cases it might be more convenient for our partners to send us bid loss notifications in buckets, which means using one notification request to send the loss notifications of several bid requests. This can be achieved using the HTTP POST implementation.

Please contact us if you would like to implement this feature.