List of request fields sent to DSPs in IX initiated user data matching

Index Exchange (IX) sends the following case-sensitive GET parameters in the user data matching request to DSPs.

Parameter Scope Description

cm_callback_url

optional

The IX callback URL that is used to complete the match (URL encoded).

Note: If omitted, DSPs must know the cm_callback_url. If you do not know the cm_callback_url, contact your IX Representative.

cm_dsp_id

optional

The IX static identifier for a DSP.

Note: If omitted, DSPs must know the cm_dsp_id. If you do not know the cm_dsp_id, contact your IX Representative.

cm_user_id

optional

A unique 24-character identifier (URL encoded) for IX.

us_privacy

optional

Contains the US Privacy string when available from ad requests. For more information, see the IAB's US Privacy String documentation.

gdpr

optional

Specifies if the user is in a GDPR regulated region, where:

  • 1 is the user is in a GDPR regulated region
  • 0 is GDPR does not apply

For more information, see the IAB's Consent String documentation.

gdpr_consent

optional

Contains the Transparency and Consent string when available from ad requests. For more information, see the IAB's Consent String documentation.