> For the complete documentation index, see [llms.txt](https://docs.exads.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.exads.com/rtb/advertisers/open-rtb/open-rtb-2p5-adv-response-generic.md).

# Open RTB 2.5 Bid Response

The response for a bid request has the following structure:

## Bid Response Object <a href="#bid-response-object" id="bid-response-object"></a>

| 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 <a href="#seatbid" id="seatbid"></a>

| 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 <a href="#seatbidbid" id="seatbidbid"></a>

| 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       | Ad markup (string)                                                                                                                                                                                                                                   |
| nurl      | No        | Win notification URL, it is recommended to use HTTP over HTTPS for nurl (string) - not mandatory                                                                                                                                                     |
| burl      | No        | Billing notification URL, called by EXADS when the impression or click becomes billable (CPM or CPC, per the `btype` field), so it can be counted from the billable event instead of the pixel. Recommended to use HTTP over HTTPS for burl (string) |

### seatbid.bid.ext <a href="#seatbidbidext" id="seatbidbidext"></a>

| 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 <a href="#json-examples" id="json-examples"></a>

### Banner, Popunder, Video, Push Notifications: JSON <a href="#banner-popunder-video-push-notifications-json" id="banner-popunder-video-push-notifications-json"></a>

```json
{
  "id": "d4b5c697-41f3-4c1c-a3d5-5fd01b5ef2aa",
  "seatbid": [
    {
      "bid": [
        {
          "id": "e3852965cc7b28d03ff3069debcc83cb6d68e753",
          "impid": "974090632",
          "price": 3.19,
          "adm": "<EXADS_XML_OR_JSON_AD_MARKUP>",
          "ext": {
            "btype": 1
          },
          "nurl": "https://www.dsp-network.com/win_notification_url",
          "burl": "https://www.dsp-network.com/billing_notification_url",
          "cid": "5834901",
          "crid": "83232831"
        }
      ]
    }
  ]
}
```

## Email Clicks JSON <a href="#email-clicks-json" id="email-clicks-json"></a>

```
{
    "id": "",
    "bidid": 123,
    "seatbid": [{
        "bid": [{
            "id": "12ab3d",
            "adid": 1,
            "impid": "",
            "price": 0.12,
            "adm": "https://www.dsp-network.com/tracker/impression",
            "ext":{
                "btype": 2  
            },
            "burl": "https://www.dsp-network.com/billing_notification_url"
        }]
    }]
}
```

## Direct Links <a href="#direct-links" id="direct-links"></a>

```
{
    "id": "",
    "bidid": 123,
    "seatbid": [{
        "bid": [{
            "id": "12ab3d",
            "adid": 1,
            "impid": "",
            "price": 0.12,
            "adm": "https://www.dsp-network.com/tracker/impression",
            "ext":{
                "btype": 2  
            },
            "burl": "https://www.dsp-network.com/billing_notification_url"
        }]
    }]
}
```

## Fullpage Interstitial (Mobile and Desktop) JSON <a href="#fullpage-interstitial-mobile-and-desktop-json" id="fullpage-interstitial-mobile-and-desktop-json"></a>

```json
{
    "id": "d4b5c697-41f3-4c1c-a3d5-5fd01b5ef2aa",
    "seatbid": [
        {
            "bid": [
                {
                    "id": "54f6f08b2e323e32ea9ec4fd6944d652c842699a",
                    "impid": "974090632",
                    "price": 0.05,
                    "adm": "https://dsp-network.com/fpi-render.php?data=TVRjME9UZ31",
                    "ext": {
                        "btype": 1,
                        "asset_mime_type": [
                            "video/mp4"
                        ]
                    },
                    "nurl": "https://www.dsp-network.com/win_notification_url",
                    "iurl": "https://www.dsp-network.com/file/video.mp4",
                    "cid": "7561981",
                    "crid": "195600_115116261",
                    "cat": [],
                    "adomain": [
                        "www.adomain.com"
                    ],
                    "w": 900,
                    "h": 1600,
                    "attr": []
                }
            ]
        }
    ],
    "cur": "EUR"
}
```

### Native: JSON <a href="#native-json" id="native-json"></a>

```json
{
    "id": "d4b5c697-41f3-4c1c-a3d5-5fd01b5ef2aa",
    "seatbid": [
      {
        "bid": [
          {
            "id": "12ab3d",
            "impid": "1915966848",
            "price": 0.71,
            "nurl": "https://www.dsp-network.com/win_notification_url",
            "burl": "https://www.dsp-network.com/billing_notification_url",
            "adm": "<EXADS_JSON_AD_MARKUP_1>",
            "ext": {
              "btype": 1
            }
          }
        ]
      }, 
      {
        "bid": [
          {
            "id": "12ab3e",
            "impid": "1915966848",
            "price": 0.62,
            "nurl": "https://www.dsp-network.com/win_notification_url",
            "burl": "https://www.dsp-network.com/billing_notification_url",
            "adm": "<EXADS_JSON_AD_MARKUP_2>",
            "ext": {
              "btype": 1
            }
          }
        ]
      }
    ]
}
```

## ADM Examples <a href="#adm-examples" id="adm-examples"></a>

The examples below shows examples of data used in this ADM parameter.

### Banner: HTML <a href="#banner-html" id="banner-html"></a>

```
<a href=\"https:\/\/dsp.com\/click-tracker.php?data=H4sIAAAAA...8Da8a74VIAQAA\" target=\"_blank\" ontouchstart=\"\" onclick=\"var href='https:\/\/dsp.com\/click-tracker.php?data=H4sIAAAAA...8Da8a74VIAQAA'; this.href = href + '&clickX=' + event.clientX + '&clickY=' + event.clientY;\"><img width=\"300\" height=\"250\" src=\"https:\/\/adasset.dsp.com\/images\/uid123\/7fed7f2794236bc6544da662be1368a1f5d73e91.jpg\" border=\"0px\" style=\"\"><\/a><img src=\"https:\/\/dsp.com\/impression.php?data=TVRZM056UTVOak...2Y1Yw--\" width=\"1\" height=\"1\" border=\"0\" \/>
```

### Popunder <a href="#popunder" id="popunder"></a>

```
https://dsp-network.com/tracker/impression
```

### Video: XML <a href="#video-xml" id="video-xml"></a>

```xml
<?xml version="1.0" encoding="UTF-8"?>
<VAST version="3.0">
    <Ad id="5834901">
        <Wrapper>
            <AdSystem>www.ad-system.com</AdSystem>
            <VASTAdTagURI>
                <![CDATA[https://dsp-network.com/vast/inline.xml]]>
            </VASTAdTagURI>
            <Impression id="msgtr">
                <![CDATA[https://dsp-network.com/tracker/impression]]>
            </Impression>
            <Error>
                <![CDATA[https://dsp-network.com/error?code=[ERRORCODE]]>
            </Error>
            <Creatives>
                <Creative sequence="1" id="83232831">
                    <Linear>
                        <TrackingEvents>
                            <Tracking id="prog_1" event="progress" offset="00:00:10.000">
                                <![CDATA[https://dsp-network.com/tracker/progress]]>
                            </Tracking>
                        </TrackingEvents>
                        <VideoClicks>
                            <ClickTracking>
                                <![CDATA[https://dsp-network.com/tracker/click]]>
                            </ClickTracking>
                        </VideoClicks>
                    </Linear>
                </Creative>
            </Creatives>
        </Wrapper>
    </Ad>
</VAST>
```

### Native Ads: JSON <a href="#native-a-ds-json" id="native-a-ds-json"></a>

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

```
{\"native\":{\"link\":{\"url\":\"https:\/\/dsp-network.com\/tracker\/impression\"},\"assets\":[{\"id\":1,\"required\":1,\"img\":{\"url\":\"https:\/\/dsp-network.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://dsp-network.com/imptrackers?landingpage=1\"],\"eventtrackers\":[{\"event\":1,\"method\":1,\"url\":\"https://dsp-network.com/eventtrackers?landingpage=1\"}]}}
```

* 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

![crop anchor point](https://docs-advanced.exads.com/docs/assets/hires/crop_anchor_point.png)

Which is based on the following JSON object:

```json
{
    "native": {
          "link": {
              "url": "https://dsp-network.com/tracker/impression"
          },
          "assets": [
              {
                  "id": 1,
                  "required": 1,
                  "img": {
                      "url": "https://dsp-network.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://dsp-network.com/imptrackers?landingpage=1",
              "https://dsp-network.com/imptrackers?landingpage=2"
          ],
          "eventtrackers": [
              {
                  "event": 1,
                  "method": 1,
                  "url": "https://dsp-network.com/eventtrackers?landingpage=1"
              }, {
                  "event": 1,
                  "method": 1,
                  "url": "https://dsp-network.com/eventtrackers?landingpage=2"
              }
          ]
    }
}
```

### Push Notification Ads: JSON <a href="#push-notification-a-ds-json" id="push-notification-a-ds-json"></a>

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 192x192 and 720x480. One image asset per notification.

```
{\"native\":{\"link\":{\"url\":\"https:\/\/dsp-network.com\/tracker\/impression\"},\"assets\":[{\"id\":1,\"required\":1,\"img\":{\"url\":\"https:\/\/dsp-network.com\/images\/myad.jpg\",\"w\":720,\"h\":480}},{\"id\":2,\"title\":{\"text\":\"Ad Title\"}},{\"id\":3,\"data\":{\"type\":2,\"value\":\"Ad description\"}}],\"imptrackers\":[\"https://dsp-network.com/imptrackers?landingpage=1\"]}}
```

Which is based on the following JSON object:

```json
{
    "native": {
          "link": {
              "url": "https://dsp-network.com/tracker/impression"
          },
          "assets": [
              {
                  "id": 1,
                  "required": 1,
                  "img": {
                      "url": "https://dsp-network.com/images/myad.jpg",
                      "w": 720,
                      "h": 480
                  }
              },
              {
                  "id": 2,
                  "title": {
                      "text": "Ad Title"
                  }
              },
              {
                  "id": 3,
                  "data": {
                      "type": 2,
                      "value": "Ad description"
                  }
              }
          ],
          "imptrackers": [
              "https://dsp-network.com/imptrackers?landingpage=1"
          ]
    }
}
```

\* 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 <a href="#no-bid-response" id="no-bid-response"></a>

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

## Billing Notification <a href="#billing-notification" id="billing-notification"></a>

If the parameter **Bid Response Object -> Seat Bid Object -> Bid Object -> burl** is in the bid response and is a valid URL, EXADS will send a GET request to it when the impression or click becomes billable (CPM or CPC, per the `btype` field). This allows the event to be counted from the billable server-to-server event rather than from pixel-based tracking.

If both `nurl` and `burl` are present, both will be called.

<br>


---

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