Open RTB Bid Response Specifications

The response for a bid request should have the following structure:

Bid Response Object

Attribute	Required?	Description
id	Yes	ID of the bid request, must match id sent in the request (string)
seatbid	Yes	Collection of bids made by the bidder on behalf of a specific seat

seatbid

Attribute	Required?	Description
bid	Yes	ID of the impression object to which this bid applies, must match id sent in the request (string)

seatbid.bid

Attribute	Required?	Description
id	Yes	ID for the bid object chosen by the bidder (string)
impid	Yes	ID of the impression object to which this bid applies (string)
price	Yes	Bid price in CPM or CPC (float)
adm	Yes	Paradox XML/JSON Ad Markup (string)
nurl	Yes*	Win notification URL, it is recommended to use HTTP over HTTPS for nurl (string)
burl	No*	Billing notification URL, it is recommended to use HTTP over HTTPS for burl
ext	No	Paradox specific extension (object)

---

Note:

• The nURL must be notified in order to ensure campaign capping and avoid getting the same response every time.
• The bURL is called when impression or click has been delivered, depending on CPM or CPC from btype field(default CPM).

---

seatbid.bid.ext

Attribute	Required?	Description
btype	Recommended	Pricing Model. Values: 1 = CPM, 2 = CPC. Default = 1 (int). Note: When response is for an Email Clicks zone request, 1 = Smart CPC.

---

Note: Only Push Notification and Native ad formats may bid with the CPC pricing model.

---

JSON Examples

Banner / iFrame / Popunder / In-Stream / Push Notifications: JSON

{
    "id": "d4b5c697-41f3-4c1c-a3d5-5fd01b5ef2aa",
    "seatbid": [{
        "bid": [{
            "id": "12ab3d",
            "impid": "1915966848",
            "price": 0.55,
            "adm": "<PARADOX_XML_OR_JSON_AD_MARKUP>",
            "nurl": "https://mysite.com/my_notification_url",
            "burl": "https://mysite.com/my_billing_notification_url",
            "ext": {
                "btype": 1
            }
        }]
    }]
}

Direct Links

{
    "id": "",
    "bidid": 123,
    "seatbid": [{
        "bid": [{
            "id": "12ab3d",
            "adid": 1,
            "impid": "",
            "price": 0.12,
            "adm": "<PARADOX_XML_AD_MARKUP>",
            "ext":{
                "btype": 2  
            },
            "burl": "https://mysite.com/my_billing_notification_url"
        }]
    }]
}

Email Clicks

{
    "id": "",
    "bidid": 123,
    "seatbid": [{
        "bid": [{
            "id": "12ab3d",
            "adid": 1,
            "impid": "",
            "price": 0.12,
            "adm": "<PARADOX_XML_AD_MARKUP>",
            "ext":{
                "btype": 2  
            },
            "burl": "https://mysite.com/my_billing_notification_url"
        }]
    }]
}

Fullpage Interstitial (Mobile and Desktop)

{
    "id": "d4b5c697-41f3-4c1c-a3d5-5fd01b5ef2aa",
    "seatbid": [{
        "bid": [{
            "id": "12ab3d",
            "impid": "974090632",
            "price": 0.55,
            "adm": "<PARADOX_XML_OR_JSON_AD_MARKUP>",
            "nurl": "http://network-domain.com/win-notification",
            "ext": {
                "btype": 1
            },
            "burl": "https://mysite.com/my_billing_notification_url"
        }]
    }]
}

Native: JSON

{
    "id": "d4b5c697-41f3-4c1c-a3d5-5fd01b5ef2aa",
    "seatbid": [
      {
        "bid": [
          {
            "id": "12ab3d",
            "impid": "1915966848",
            "price": 0.71,
            "nurl": "https://mysite.com/my_notification_url",
            "burl": "https://mysite.com/my_billing_notification_url",
            "adm": "<PARADOX_JSON_AD_MARKUP_1>",
            "ext": {
              "btype": 1
            }
          }
        ]
      }, 
      {
        "bid": [
          {
            "id": "12ab3e",
            "impid": "1915966848",
            "price": 0.62,
            "nurl": "https://mysite.com/my_notification_url_2",
            "burl": "https://mysite.com/my_billing_notification_url",
            "adm": "<PARADOX_JSON_AD_MARKUP_2>",
            "ext": {
              "btype": 1
            }
          }
        ]
      }
    ]
}

ADM Examples

As you can see above, the adm parameter can contain a piece of XML or JSON. The examples below show examples of both XML and JSON as used in this ADM parameter.

Banner: XML

<?xml version="1.0" encoding="ISO-8859-1"?>
<ad>
    <imageAd>
        <clickUrl><![CDATA[http://mysite.com/landingpages/mypage]]></clickUrl>
        <imgUrl><![CDATA[http://mysite.com/images/myad.jpg]]></imgUrl>
    </imageAd>
</ad>

Direct Links: XML

<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>
<ad>
    <emailClick>
        <url><![CDATA[https://mysite.com/landingpages?el={email_encoded}]]></url>
    </emailClick>
</ad>

Email Clicks: XML

<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>
<ad>
    <emailClick>
        <url><![CDATA[https://mysite.com/landingpages?el={email_encoded}]]></url>
    </emailClick>
</ad>

Iframe HTML Banner: XML

<?xml version="1.0" encoding="ISO-8859-1"?>
<ad>
    <iframeAd>
        <url><![CDATA[http://mysite.com/iframe_url]]></url>
    </iframeAd>
</ad>

---

Note: The support for the iFrame markup response must be enabled by the network on the partner account level.

---

Fullpage Interstitial Iframe (Mobile and Desktop): XML

<?xml version="1.0" encoding="ISO-8859-1"?>
<ad>
    <iframeAd>
        <url><![CDATA[http://mysite.com/landingpages/mypage]]></url>
    </iframeAd>
</ad>

Fullpage Interstitial Banner (Mobile and Desktop): XML

<?xml version="1.0" encoding="ISO-8859-1"?>
<ad>
    <imageAd>
        <clickUrl><![CDATA[http://mysite.com/landingpages/mypage]]></clickUrl>
        <imgUrl><![CDATA[http://mysite.com/images/myad.jpg]]></imgUrl>
    </imageAd>
</ad>

Popunder: XML

<?xml version="1.0" encoding="ISO-8859-1"?>
<ad>
    <popunderAd>
        <url><![CDATA[http://mysite.com/landingpages/mypage]]></url>
    </popunderAd>
</ad>

In-Stream Ads: JSON

For In-Stream ads the adm parameter should contain a JSON encoded string. It can follow one of two structures, either by using Local VAST or Remote VAST.

By using local VAST the whole VAST tag will be generated on the network side and the partner will need to send all individual data needed for the ad to be correctly displayed. With the remote VAST the content will be loaded by using the VAST Wrapper standard.

Local VAST

{\"instream\":{\"videoUrl\":\"https:\/\/mysite.com\/video.mp4\",\"clickUrl\":\"https:\/\/mysite.com\/clickurl\",\"trackingEvents\":[{\"type\":\"impression\",\"url\":\"https:\/\/mysite.com\/impression\"},{\"type\":\"complete\",\"url\":\"https:\/\/mysite.com\/complete\"},{\"type\":\"progress\",\"offset\":\"00:00:10.000\",\"url\":\"https:\/\/mysite.com\/progress10secs\"}],\"cta\":{\"displayUrl\":\"somedomain.com\",\"text\":\"Click Here\"}}}

Based on the following JSON object:

{
    "instream": {
        "videoUrl": "https://mysite.com/video.mp4",
        "clickUrl": "https://mysite.com/clickurl",
        "trackingEvents": [{
            "type": "impression",
            "url": "https://mysite.com/impression"
        }, {
            "type": "complete",
            "url": "https://mysite.com/complete"
        }, {
            "type": "progress",
            "offset": "00:00:10.000",
            "url": "https://mysite.com/progress10secs"
        }],
        "cta": {
            "displayUrl": "somedomain.com",
            "text": "Click Here"
        }
    }
}

Remote VAST

{\"instream\":{\"remoteUrl\":\"https:\/\/mysite.com\/vasturl\"}}

Based on the following JSON object:

{
    "instream": {
        "remoteUrl": "https://mysite.com/vasturl"  
    }
}

Tracking Events

When using the In-Stream local VAST bid response structure it is allowed to send a list of tracking events. The supported event types are impression, progress and complete.

The tracking events must follow the same structures as in the example above.

Native Ads: JSON

For native ads the adm parameter should contain a JSON encoded string like this:

{\"native\":{\"link\":{\"url\":\"http:\/\/mysite.com\/landingpages\/mypage\"},\"assets\":[{\"id\":1,\"required\":1,\"img\":{\"url\":\"http:\/\/mysite.com\/images\/myad.jpg\",\"w\":300,\"h\":300,\"ext\":{\"crop_anchor_point\":1}}},{\"id\":2,\"title\":{\"text\":\"Ad Title\"}},{\"id\":3,\"data\":{\"type\":2,\"value\":\"Ad description\"}},{\"id\":4,\"data\":{\"type\":1,\"value\":\"Ad brand\"}},{\"id\":5,\"ext\":{\"crop_anchor_point\":1}}],\"imptrackers\":[\"https://mytracker1.com\"],\"eventtrackers\":[{\"event\":1,\"method\":1,\"url\":\"https://myEventTracker1.com\"}]}}

• crop_anchor_point: MIDDLE_CENTER = 0, TOP_LEFT = 1, TOP_CENTER = 2, TOP_RIGHT = 3, MIDDLE_LEFT = 4, MIDDLE_RIGHT = 5, BOTTOM_LEFT = 6, BOTTOM_CENTER = 7, BOTTOM_RIGHT= 8 (integer) – not mandatory

Which is based on the following JSON object:

{
    "native": {
          "link": {
              "url": "http://mysite.com/landingpages/mypage"
          },
          "assets": [
              {
                  "id": 1,
                  "required": 1,
                  "img": {
                      "url": "http://mysite.com/images/myad.jpg",
                      "w": 300,
                      "h": 300,
                      "ext": {
                          "crop_anchor_point": 1
                      }
                  }
              },
              {
                  "id": 2,
                  "title": {
                      "text": "Ad Title"
                  }
              },
              {
                  "id": 3,
                  "data": {
                      "type": 2,
                      "value": "Ad description"
                  }
              },
              {
                  "id": 4,
                  "data": {
                      "type": 1,
                      "value": "Ad brand"
                  }
              }
          ],
          "imptrackers": [
              "https://mytracker1.com",
              "https://mytracker2.com"
          ],
          "eventtrackers": [
              {
                  "event": 1,
                  "method": 1,
                  "url": "https://myEventTracker1.com"
              }, {
                  "event": 1,
                  "method": 1,
                  "url": "https://myEventTracker2.com"
              }
          ]
    }
}

Push Notification Ads: JSON

For Push Notification ads the adm parameter should contain a JSON encoded string like this (note that we use the ‘native’ object to implement push notification ads). Width and height depend on the width and height coming from request. Currently supported dimensions are 192×192 and 720×480. One image asset per notification.

{\"native\":{\"link\":{\"url\":\"http:\/\/mysite.com\/landingpages\/mypage\"},\"assets\":[{\"id\":1,\"required\":1,\"img\":{\"url\":\"http:\/\/mysite.com\/images\/myad.jpg\",\"w\":720,\"h\":480}},{\"id\":2,\"title\":{\"text\":\"Ad Title\"}},{\"id\":3,\"data\":{\"type\":2,\"value\":\"Ad description\"}}],\"imptrackers\":[\"https://mytracker1.com\"]}}

Which is based on the following JSON object:

{
    "native": {
          "link": {
              "url": "http://mysite.com/landingpages/mypage"
          },
          "assets": [
              {
                  "id": 1,
                  "required": 1,
                  "img": {
                      "url": "http://mysite.com/images/myad.jpg",
                      "w": 720,
                      "h": 480
                  }
              },
              {
                  "id": 2,
                  "title": {
                      "text": "Ad Title"
                  }
              },
              {
                  "id": 3,
                  "data": {
                      "type": 2,
                      "value": "Ad description"
                  }
              }
          ],
          "imptrackers": [
              "https://mytracker1.com"
          ]
    }
}

* Only one imptracker URL is allowed in the case of Push Notification ads * We use the ‘native’ object for push notification ads

No Bid Response

To answer to a bid request without making an actual bid, an HTTP response code 204 “No Content” should be sent.

Win Notification

If the parameter Bid Response Object -> Seat Bid Object -> Bid Object -> nurl is in the bid response and is a valid URL, Paradox platform will send a GET request to it. This URL can have a few tokens to be replaced by Paradox before doing the GET:

${AUCTION_ID} - ID of the bid request; from "Bid Request Object -> id" attribute.
${AUCTION_BID_ID} - ID of the bid; from "Bid Response Object -> bidid" attribute.
${AUCTION_IMP_ID} - ID of the impression just won; from "Bid Request Object -> Impression Object -> id" attribute.
${AUCTION_SEAT_ID} - ID of the bidder seat for whom the bid was made; from "Bid Response Object -> Seat Bid Object -> Bid Object -> id" attribute.
${AUCTION_AD_ID} - ID of the ad markup the bidder wishes to serve; from "Bid Response Object -> Seat Bid Object -> Bid Object -> adid" attribute.
${AUCTION_PRICE} - Settlement price using the same currency and units as the bid; from "Bid Response Object -> Seat Bid Object -> Bid Object -> price" attribute.
${AUCTION_CURRENCY} - The currency used in the bid (explicit or implied); for confirmation only.

Example:

https://mysite.com/my_notification_url?id=${AUCTION_ID}&bidid=${AUCTION_BID_ID}&price=${AUCTION_PRICE}&currency=${AUCTION_CURRENCY}