# Basis Reference This is a reference document for the Basis destination. For information on how to set up this integration, see the [Basis Quick Start Guide](/integrations/destinations/demand-side-platforms-dsps/basis/basis-quick-start-guide.md) ## Destination Info * Supports [Track](/reference/developer/freshpaint-sdk-reference.md#track) calls * Supports [HIPAA mode](/readme/hipaa-mode.md) * Supports [Freshpaint Impression Pixel](/integrations/impression-pixel.md) * Supports forwarding from the [Google Tag Manager Integration](/integrations/google-tag-manager-integration.md) * Refer to this destination as **Basis** in the [Integrations object](/reference/developer/freshpaint-sdk-reference.md#using-the-integrations-object) * If you've configured multiple Pixel IDs, you can choose a specific one by suffixing the Pixel ID, such as: **Basis::123456.** You can retrieve this value from Basis configuration page for the Pixel ID of interest. * Connection Modes:

	Client-side	Server-side
Web	false	true
Mobile	false	true
Server	false	true

## Click Through Tracking In order for Freshpaint to be able to automatically capture the click ID auto-generated by the Basis advertisement, [cookieless conversion attribution needs to be enabled](https://help.basis.com/docs/Cookieless_Conversions/Cookieless_Conversions_Guide.htm). Basis will append a `cntr_auctionId` parameter to the landing page URL query string, which works similar to click id's from other advertising platforms. Freshpaint when installed on a page will look for this click id and automatically set the `$cntr_auctionId` event property with the click id. Assuming you have followed the [Basis Quick Start Guide](/integrations/destinations/demand-side-platforms-dsps/basis/basis-quick-start-guide.md) to set up your Basis destination, you can verify that click through tracking is working by looking for an event in event verification that contains the `$cntr_auctionId` field.

## View Through Tracking Freshpaint supports view through tracking by capturing the `cntr_auctionId` passed in by Basis using the Freshpaint Impression Pixel. Assuming you have followed the [Basis Quick Start Guide](/integrations/destinations/demand-side-platforms-dsps/basis/basis-quick-start-guide.md) to set up your Basis destination, you can verify that view through tracking is working by looking for an event in event verification that contains the `$cntr_auctionId` field, similar to how you can verify Click Through Conversion. You can also look for a transformation that shows that the event data was enriched by the Freshpaint Impression Pixel.

Transformation applying the Impression Pixel captured impression to an event

## Relevant Properties


Freshpaint Property	Basis Parameter	Type	Required?	Description
`$cntr_auctionId`	`cntr_postbackAuctionId`	string	Required	`cntr_auctionId` is appended to the landing page URL by Basis. Freshpaint will automatically capture cntr_auctionId for events from your website. For events from other sources you would need to provide `$cntr_auctionId` as an event property. If the Freshpaint Impression pixel is in use, `cntr_auctionId` is added automatically as a transformation to the appropriate events if a match is found.
`<custom_property>`	`<custom_property>`	string	Optional	Any additional / custom properties on the event and allowed by the HIPAA allow list will be passed to Basis

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