Bid on Behalf of Multiple Accounts

A bidder can purchase inventory for multiple buyers in a single bid response. For example, a demand-side platform (DSP) might use its bidding application to purchase inventory for several marketers or agencies who are buyers. This guide explains how to code your bidder to process a single request sent on behalf of multiple buyers.

Background

In some scenarios, an ad network or agency trading desk may choose to work with one or more DSPs. There are two options available for buyers who work through a DSP:

• The DSP purchases inventory for marketers or agencies that are not buyers. In this case, the DSP receives one bid request and responds with one bid. Google bills the DSP directly.
• The DSP purchases inventory for marketers or agencies that are buyers. The DSP receives one bid request including multiple billing IDs associated with eligible buyers, and can place distinct bids for each buyer they intend to bid on behalf of. In this model, Google bills the buyer, not the DSP. The rest of this guide focuses on this scenario.

Setup and pretargeting

Google will send a bid request containing one or more billing IDs associated with buyers and pretargeting configurations that targeted the impression. These can be found with the BidRequest.imp.ext.billing_id field.

When responding to a BidRequest that contains billing IDs from multiple buyers, BidResponse.seatbid.bid.ext.billing_id is required so that Google knows which account to associate with the bid. Any response that does not set the field is filtered. The field remains optional for any BidRequest that only includes a single billing ID.

Pretargeting example

A bidder bids on behalf of two buyers, one having a billing ID of 123, and the other with billing ID 124. The bidder configures one pretargeting configuration with billing ID 213 to target the English language, and another with billing ID 231 to target personal computers. The following describes the billing IDs that appear in bid requests for different kinds of impressions.

Impression description	Billing IDs in bid request
Japanese language content on a personal computer.	123, 124, 231
English language content on a mobile phone.	123, 124, 213
English language content on a personal computer.	123, 124, 213, 231

Important: If these were your only active pretargeting configurations, you wouldn't receive bid requests for impressions that didn't originate from a personal computer and include non-English content.

Example BidRequests

Below are examples of a BidRequest. You'll note that there are multiple billing IDs in these requests because the requests are applicable to multiple accounts.

OpenRTB Protobuf

sample

id: "n9YFp0D9qE02Q5A49bo68a"
imp {
  id: "1"
  banner {
    w: 320
    h: 50
    pos: ABOVE_THE_FOLD
    api: MRAID_1
    api: MRAID_2
    format {
      w: 320
      h: 50
    }
  }
  displaymanager: "GoogleMobileAds-iOS"
  displaymanagerver: "11.2.0"
  tagid: "2913643481"
  bidfloor: 0.04
  bidfloorcur: "USD"
  secure: true
  exp: 3600
  clickbrowser: true
  metric {
    type: "click_through_rate"
    value: 0.0003642654628492892
    vendor: "EXCHANGE"
  }
  metric {
    type: "viewability"
    value: 0.98
    vendor: "EXCHANGE"
  }
  [com.google.doubleclick.imp] {
    billing_id: 41048190734
    billing_id: 87998475627
    publisher_settings_list_id: 5889715199959683550
    publisher_settings_list_id: 3379823455061055318
    allowed_vendor_type: 566
    allowed_vendor_type: 113
    ampad: AMP_AD_NOT_ALLOWED
    skadn {
      sourceapp: "com.google.testapp"
      skadnetids: "6ZVs3vs4"
      versions: "2.0"
      versions: "2.1"
      fidelities: VIEW_THROUGH_ADS
      fidelities: STOREKIT_RENDERED_ADS
    }
    creative_enforcement_settings {
      policy_enforcement: POLICY_ENFORCEMENT_NETWORK_AND_PLATFORM_POLICY
      publisher_blocks_enforcement: PUBLISHER_BLOCKS_ENFORCEMENT_APPLIES
    }
    auction_environment: SERVER_SIDE_AUCTION
    ae: SERVER_SIDE_AUCTION
  }
}
app {
  name: "Test App"
  bundle: "com.google.testapp"
  publisher {
    id: "pub-6227762759521589"
    [com.google.doubleclick.publisher] {
      country: "US"
    }
  }
  content {
    url: "https://www.google.com"
    livestream: false
    language: "en"
  }
  storeurl: "https://www.google.com"
  [com.google.doubleclick.app] {
    inventorypartnerdomain: "OMITTED"
  }
}
device {
  ua: "Mozilla/5.0 (iPhone; CPU iPhone OS 17_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148"
  ip: "192.168.1.0"
  geo {
    lat: 0.0
    lon: 0.0
    country: "USA"
    region: "TX"
    metro: "623"
    city: "Lewisville"
    type: IP
    utcoffset: -300
    accuracy: 6225
  }
  make: "Apple"
  model: "iPhone13,2"
  os: "iOS"
  osv: "17.4.1"
  connectiontype: WIFI
  devicetype: HIGHEND_PHONE
  lmt: true
  hwv: "iPhone13,2"
  w: 390
  h: 844
  pxratio: 3.0
  sua {
    browsers {
      brand: "Mozilla"
      version: "5"
      version: "0"
    }
    browsers {
      brand: "AppleWebKit"
      version: "605"
      version: "1"
    }
    platform {
      brand: "iPhone"
      version: "17"
      version: "4"
    }
    mobile: true
    bitness: "64"
    model: "iPhone"
    source: USER_AGENT_STRING
  }
  [com.google.doubleclick.device] {
    atts: 2
  }
}
at: FIRST_PRICE
tmax: 1000
cur: "USD"
bcat: "IAB18-5"
bcat: "IAB23-4"
bapp: "359917414"
bapp: "1446254576"
source {
  schain {
    complete: true
    nodes {
      asi: "testssp.com"
      sid: "pub-1111111111111111"
      hp: true
    }
    ver: "1.0"
  }
  [com.google.doubleclick.source] {
    omidpn: "Google"
    omidpv: "afma-sdk-i-v11.2.0"
    schain {
      complete: 1
      nodes {
        asi: "testssp.com"
        sid: "pub-1111111111111111"
        hp: 1
      }
      ver: "1.0"
    }
  }
}
[com.google.doubleclick.bid_request] {
  google_query_id: "ANy-z17251-40u3eXfXPL5j3MDPa7n6Ree92uf7354o71FP67Rk5i3G30Ez7p39Ze1722D8H"
  fcap_scope: FREQUENCY_CAPPING_SCOPE_APP
  privacy_treatments {
    allow_user_data_collection: true
  }
}