> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.funnelflux.pro/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Where do I find my postback URL?

The FunnelFlux postback URL is universal.

The simplest place to find it is:

1. Open **Settings**
2. Go to **Tracking Codes**
3. Copy the FunnelFlux postback URL

You can also find postback URLs in other parts of the UI, such as offers and offer sources, usually under their **Conversion Tracking** section.

## What the postback needs

For normal server-to-server conversion tracking, FunnelFlux needs the **hit ID**.

The usual flow is:

1. FunnelFlux sends the visitor to the offer
2. The offer URL includes a FunnelFlux hit ID in one of the network's sub ID fields
3. The affiliate network stores that value
4. When a conversion happens, the network calls your FunnelFlux postback URL and passes that hit ID back
5. FunnelFlux uses the hit ID to attribute the conversion

## Common mistake

Do not test with a fake or placeholder hit ID.

A postback test needs a real hit ID from a real tracked visit. If you fire a postback with an empty value, placeholder value, or the wrong ID type, it will not attribute correctly.

For the full setup flow, see [Add Offer Sources and Offers](../getting-started/05-add-offer-sources-and-offers.md) and [Tracking conversions](../tracking-setup/tracking-conversions.md).