In Facebook marketing API, where to set target URL of an Ad Campaign - facebook

Question

I would like to create an Ad Campaign with the Marketing API but I don't know where I can set the target URL of this campaign.
I can set the objective of the campaign to WEBSITE_CLICKS but where to set the URL it will goes to?
If I use the Web Ads Manager, when I click create campaign and select the objective of "web site click", then I have to enter the promoted URL. But with the API I don't find where I can set this.
Thanks,
Julien

Answer 1

I finally found where I can find the promoted URL of my Ad.
In fact when you generate your Ad through the Web Ad Manager it will create a hidden post on the Facebook page that is used for the Ad (see this blog post). And Ad creative use an object_story_id and object_story_spec to link to it. So I can find my link in the field 'object_story_spec' of the creative.
->/v2.3/6024899447563/adcreatives?fields=object_story_spec
result:
{
"data": [
{
"object_story_spec": {
"page_id": "1574237802836192",
"link_data": {
"link": "http://www.mylink.com/destination",
"message": "Click!",
"name": "My test",
"description": " ",
"image_hash": "9b25eba026f1ad716010963db25fabb8",
"multi_share_optimized": false
}
},
"id": "6024899447563"
}
],
"paging": {
"cursors": {
"before": "NjAyNDg5ODQ0ODE2Mg==",
"after": "NjAyNDg5OTU0ODE2Mg=="
}
}
}
So the link is in object_story_spec.link_data.link of the creative of the Ad.

Answer 2

The Ad Set Object can contain an Promotion Object:
https://developers.facebook.com/docs/marketing-api/adset#promoted_object
Or it can be contained in the Ad Creative as a link_url:
https://developers.facebook.com/docs/marketing-api/adcreative/v2.3
If Campaign Object has the objective set ( which is optional ), ad sets and ad creative will be validated against the objective.
You may also need to query connection objects, especially if you want a specific Facebook Page or Tab:
https://developers.facebook.com/docs/marketing-api/connectionobjects/v2.3