SeatBid Object

A bid response can contain multiple SeatBid objects, each on behalf of a different bidder seat and each containing one or more individual bids. If multiple impressions are presented in the request, the group attribute can be used to specify if a seat is willing to accept any impressions that it can win or if it is only interested in winning any if it can win them all as a group.

Attribute	Triplelift Required	Type	Description
bid	yes	array of objects	Array of 1+ Bid objects each related to an impression. Multiple bids can relate to the same impression
seat	no	string	ID of the buyer seat on whose behalf this bid is made
group	no	integer	0 = impressions can be won individually; 1 = impressions must be won or lost as a group
ext	no	object	Placeholder for bidder-specific extensions to OpenRTB

Bid Object

A SeatBid object contains one or more Bid objects, each of which relates to a specific impression in the bid request via the impid attribute and constitutes an offer to buy that impression for a given price.

Attribute	Triplelift Required	Type	Description
id	yes	string	Bidder generated bid ID to assist with logging/tracking
impid	yes	string	ID of the Imp object in the related bid request
price	yes	float	Bid price expressed as CPM although the actual transaction is for a unit impression only
adid	no	string	ID of a preloaded ad to be served if the bid wins
nurl	no	string	Win notice URL called by the exchange if the bid wins
burl	no	string	Billing notice URL called by the exchange when a winning bid becomes billable based on exchange-specific business policy
lurl	no	string	Loss notice URL called by the exchange when a bid is known to have been lost
adm	no	string	Optional means of conveying ad markup in case the bid wins
adomain	no	array of strings	Advertiser domain for blocklist checking
bundle	no	string	A platform-specific application identifier intended to be unique to the app and independent of the exchange
iurl	no	string	URL without cache-busting to an image that is representative of the content of the campaign for ad quality/safety checking
cid	no	string	Campaign ID to assist with ad quality checking; the collection of creatives for which iurl should be representative
crid	no	string	Creative ID to assist with ad quality checking
cat	no	array of strings	IAB content categories of the creative
attr	no	array of integers	Set of attributes describing the creative
dealid	no	string	Reference to deal.id from the bid request if this bid pertains to a private marketplace direct deal
w	no	integer	Width of the creative in device independent pixels
h	no	integer	Height of the creative in device independent pixels
language	no	string	Language of the creative using ISO-639-1-alpha-2
exp	no	integer	Advisory as to the number of seconds the bidder is willing to wait between the auction and the actual impression
ext	no	object	Placeholder for bidder-specific extensions to OpenRTB