> For the complete documentation index, see [llms.txt](https://make-money.gitbook.io/integration/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://make-money.gitbook.io/integration/overview/postbacks.md).

# Postbacks

## URL

Your Postback URL is your server endpoint that expects calls from our server. An example Postback URL might look like this: 

```
https://example.com/success?user_id={user_id}&amount={amount}&payout={payout}&transaction_id={transaction_id}&user_ip={user_ip}&subid={subid}&offerid={offerid}&offername={offername}
```

## Macros

The following macros are available and will be replaced dynamically when sending you the postback:

| Parameter         | Description            |
| ----------------- | ---------------------- |
| {user\_id}        | Unique User Identifier |
| {amount}          | Reward in App Currency |
| {payout}          | Reward in US-$         |
| {transaction\_id} | Unique Transaction ID  |
| {user\_ip}        | User's IP Address      |
| {subid}           | SubID                  |
| {offerid}         | Offer ID               |
| {offername}       | Offer Name             |

{% hint style="info" %}
You can use the Unique Transaction ID to make sure that you don't credit rewards twice.
{% endhint %}

## Whitelisting

In order to ensure the integrity of the postbacks, you can whitelist our server IP. Postbacks are exclusively sent from this IP address:

```
63.32.127.99
```

## Retries

Please return status code `200`, if you have successfully processed the postback. If we receive any other status code as a response, we will retry sending the postback in 1 minute intervals with a maximum of 10 tries.