Buyer responses allow at most two bids per ad slot across all seats.
Buyer responses allow at most two bids per ad slot across all seats.
What it means
Buyer responses allow at most two bids per ad slot across all seats. This check applies to the selected vendor contract and integration direction.
Why it matters
The declared profile checks the published partner contract alongside canonical OpenRTB. It does not verify runtime approval or account configuration.
How to fix it
Keep the value within the published boundary described above. Check Unicode character counts where the contract counts characters.
Example that trips it
{
"id": "r",
"seatbid": [
{
"seat": "buyer",
"bid": [
{
"id": "b0",
"impid": "i",
"price": 1.2,
"burl": "http://buyer.example/bill?p=${AUCTION_PRICE}",
"adomain": [
"advertiser.example"
],
"crid": "creative",
"adm": "<div>Example</div>",
"iurl": "https://buyer.example/preview"
},
{
"id": "b1",
"impid": "i",
"price": 1.2,
"burl": "http://buyer.example/bill?p=${AUCTION_PRICE}",
"adomain": [
"advertiser.example"
],
"crid": "creative",
"adm": "<div>Example</div>",
"iurl": "https://buyer.example/preview"
},
{
"id": "b2",
"impid": "i",
"price": 1.2,
"burl": "http://buyer.example/bill?p=${AUCTION_PRICE}",
"adomain": [
"advertiser.example"
],
"crid": "creative",
"adm": "<div>Example</div>",
"iurl": "https://buyer.example/preview"
}
]
}
],
"ext": {
"protocol": "5.7"
}
}Profile bidswitch, OpenRTB 2.6-202606. The fixture asserts openrtb.profile.bidswitch.bid_count at seatbid[0].bid[2].impid.
Check your payload
Paste a bid request or response into the tester to see whether this code fires against it, or gate on the id in CI with the CLI: the id is stable, wording is not.
Back to the full diagnostic code reference.