> For the complete documentation index, see [llms.txt](https://knowledgebase.offer18.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledgebase.offer18.com/network/faqs/how-to-set-up-s2s-postback-with-an-advertiser-using-the-post-method.md).

# How to set up S2S postback with an advertiser using the POST method?

Offer18 supports receiving conversion postbacks via POST method, in addition to GET.

### Global Postback (S2S) - POST Method

**Endpoint:** <https://example.o18.click/p?m=0000>

#### Endpoint Parameters

|               |          |                    |
| ------------- | -------- | ------------------ |
| **Parameter** | **Type** | **Description**    |
| m             | String   | Offer18 Account ID |
| o             | String   | Offer ID           |
| ig            | Numeric  | ig=1 (for igaming) |

#### **POST body (form-urlencoded)**

<table data-search="false"><thead><tr><th></th><th></th></tr></thead><tbody><tr><td><strong>Body</strong></td><td><strong>Description</strong></td></tr><tr><td>tid</td><td>To receive a unique Click ID value being passed in Offer URL</td></tr><tr><td>event</td><td>It will be used to receive Event values (install, signup, etc)</td></tr><tr><td>sale</td><td>Recommended to use in CPS Campaign (&#x26;sale=000)</td></tr><tr><td>payout</td><td>Recommended to use in CPAS (Revshare) Campaign (&#x26;payout=000)</td></tr><tr><td>currency</td><td>3-digit currency code<br><a href="/universal/common-values.md#currency">View Currencies</a></td></tr><tr><td>auth_token</td><td>Postback security token for the advertiser</td></tr><tr><td>adv_sub1 - adv_sub5</td><td>Receive additional value from Advertiser </td></tr><tr><td>coupon</td><td>Coupon code</td></tr><tr><td>ig-user-id</td><td>iGaming user id</td></tr></tbody></table>

**Example Screenshot**

<figure><img src="https://295230641-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F41f2EboJipeUA6flsLGK%2Fuploads%2FdDXSnn8YhZde5VU8xslu%2Fimage.png?alt=media&amp;token=5601f0f3-d841-4e53-8a78-b4a7e9339017" alt=""><figcaption></figcaption></figure>