How To Access S2S Postbacks URLs
At The Offer Level
In order to access the S2S Postback that the Advertiser needs to configure on their end, head to a specific Offer:
If the Offer is set up to use S2S Postbacks as the Conversion Tracking Method, you’ll find the Postback URL here.

Using The Global Postback
The interesting thing about S2S Postbacks is that they’re the same format for any Offer. It’s always the NID and the Transaction ID that at a minimum need to be sent to Everflow via the S2S Postback.
The NID is a constant value that is prefilled, which only leaves the Transaction ID to be populated by the Advertiser when triggering the Postback.
For this reason, you don’t need to go into the Offer Details card to fetch the Postback URL, you can use the Global Postback. To access the Global Postback URL:
Here you’ll find the Global Postback URL.

Passing Additional Conversion Information Via S2S Postbacks
The following information, related to Conversions can be passed to Everflow via macros in an Advertiser Postback:
Examples Of Postback Macros
Sending A Total Sale Amount Associated With The Conversion Event
In the following postback, a total sale amount of $100.24 is associated with the conversion. This will help pass on the information to the Partner if you want, associate Revenue with the conversion, and even base the Payout as a percentage of the Revenue.
https://trk-domain-88.com/?nid=10&transaction_id=abc123&amount=100,24
Sending A Currency & Some Categorical Metadata
In the following postback, the currency associated with this conversion will be CAD and the Advertiser is sending a custom value of “blackfriday” via adv1. This would help filter reporting conversion associated with specific adv1 values, and it seems the Advertiser is using it to filter around special sale events in the example.
https://trk-domain-88.com/?nid=10&transaction_id=abc900¤cy=CAD&adv1=blackfriday