Register a segment

Marketplace Vendors
Last Updated: September 24, 2026•

Before you begin: If you are a new Data Vendor A type of Marketplace Partner that owns data segments that can be used by Index customers for a fee., you will need to complete the steps for Getting started as a Data Vendor.

As a Data Vendor, you can register a segment and control the pricing and permission of your data yourself using the self-service Data Vendor Ecosystem. By registering your data, your segments can be targeted within Marketplace Packages by Marketplace Partners The owner of an Index Marketplace that curates their media solutions within the Index Marketplace and packages these offerings to bring incremental demand to media owners. For example, a Marketplace Partner could be a media agency, a data provider, or retail media network., earning you a fee. For more information about segment fees, see How segment fees work.

  1. Enter your email address and password to log in to the Index UI at app.indexexchange.com.

  2. Go to Segments.
  3. Click REGISTER SEGMENT.
  4. In the Name field, enter a name for your segment.

    • It is recommended that you follow a consistent naming pattern, where you use the > character to break down segment hierarchies.

      • If data segments are onboarded through other partners or sources, use a DataSource > Type > Detail pattern. For example, DataSourceName > Demo > Female 18-24 or DataSourceName > Shopping > Purchase Intent > Auto.

      • If data segments are your own, you don't need to add a data source name since you are the data source, and can use a Type > Detail pattern. For example, Demo > Female 18-24 or Shopping > Purchase Intent > Auto.

    • Leading spaces or special characters (other than >) are not allowed.

      Note: If you are registering an owned segment but are not the data distributor, get the values for Name and Segment ID from the data distributor.

  5. In the Segment ID field, enter the external segment ID as assigned by the data distributor. This value can't be changed after the segment is registered.
  6. In the Data distributor drop-down list, select the data platform that's providing the data for this segment. This value can't be changed after the segment is registered.
  7. In the Attributes section, add attributes that describe and categorize the segment, so Marketplace Partners can browse and select it for targeting in a Marketplace Package. While optional, we recommend adding attributes to help Marketplace Partners discover and compare segments.

    Note: Attributes are purely informational. The values you provide are used only to improve segment discovery and have no impact on targeting eligibility.

    OptionDescription

    Description

    Enter a description to provide general information about the segment, for example, the type of audience in the segment, how they were identified, and what the segment is useful for.

    Audience size

    Enter an estimate of the segment's size. Depending on how the segment was built, this may represent users, devices, or available inventory.

    Categories

    Select the content or audience categories that best describe the segment:

    Channel types

    Select one or more media environments where the segment can be activated:

    Geographies

    Select the geographical markets where the segment's data is sourced from, for example, whether it comes from users in the US or Canada:

    • Global: All markets globally

    • Americas — All Markets: All markets in the Americas

    • Americas — Argentina: Markets in Argentina

    • Americas — Brazil: Markets in Brazil

    • Americas — Canada: Markets in Canada

    • Americas — Mexico: Markets in Mexico

    • Americas — USA: Markets in the United States

    • Americas — Rest of LATAM: Latin-American markets not listed above

    • APAC — All Markets: All markets in Asia-Pacific

    • APAC — Australia: Markets in Australia

    • APAC — India: Markets in India

    • APAC — Japan: Markets in Japan

    • APAC — Singapore: Markets in Singapore

    • APAC — Southeast Asia: Markets in Southeast Asia (Burma, Thailand, Laos, Cambodia, Vietnam, Malaysia, Singapore, Indonesia, Philippines, Brunei, Timor-Leste).

    • APAC — South Korea: Markets in South Korea

    • APAC — Rest of APAC: Asia-Pacific markets not listed above

    • EMEA — All Markets: All markets in Europe, the Middle East, and Africa

    • EMEA — France: Markets in France

    • EMEA — Germany: Markets in Germany

    • EMEA — Italy: Markets in Italy

    • EMEA — MENA: Markets in the Middle East and North Africa

    • EMEA — Nordics: Markets in the Nordic countries (Denmark, Finland, Iceland, Norway, Sweden, Aland, the Faroe Islands, and Greenland)

    • EMEA — Spain: Markets in Spain

    • EMEA — UK: Markets in the United Kingdom (England, Scotland, Wales, and Northern Ireland)

    • EMEA — Rest of Europe: European markets not listed above

    Note: If your market is not listed, select the appropriate Rest of option (for example, Americas — Rest of LATAM). For clarity, we recommend including the specific market in the segment's name or description.

  8. In the Permissions & Fees section, choose whether to share the segment with specific partners or with everyone. You can also keep it private, so no partner can see or use it.

    TaskDescription

    Share the segment with specific partners

    To share your segment with specific partners:

    1. Click Custom.

    2. Under Standard fee (optional), optionally define a standard fee for this segment, which will be the global price for all partners who can see and use this segment. Select the fee's pricing model as either a fixed CPM Cost Per Thousand (CPM). A pricing structure for buying impressions and is the cost of serving an advertisement 1,000 times. Also known as Cost Per Mille (where M represents 1,000 in Roman numerals) or Cents Per Mille. or a percentage of Marketplace Media Spend (Alpha participants only):

      Note: Percentage of media is currently in alpha. If you would like to participate in the alpha program, contact your Index Representative.

      OptionDescription

      CPM

      1. Click CPM.
      2. Enter the CPM value, up to $20 USD.

      % of media (Alpha participants only)

      1. Click % of media.
      2. Enter the percentage value, up to 15 percent.
      3. Optionally, in the up to field, enter the maximum CPM fee that can be charged for this segment, up to $20 USD.

      Note: This value appears as the Marketplace Vendor Fee in Reports in the Index UI The Index UI at app.indexexchange.com that allows you to manage integration settings, such as inventory, campaign, and deal settings. and when targeting segments in a deal A private auction that allows media owners to offer specific inventory directly to selected buyers identified by a deal ID. Terms are negotiated and are agreed upon before the auction occurs.. For more information, see How segment fees work.

    3. Under Partners (optional), choose the partners who can see and use this segment. Optionally, set custom fees for each partner.

      1. Click ADD PARTNER.
      2. In the Partner drop-down list, select the partner.

      3. In the Fee type drop-down list, select one of the following options:

        OptionDescription

        Standard

        Apply the standard fee, if set, to the selected partner.

        Custom

        Apply a custom fee to the selected partner.

      4. If applying a custom fee to the selected partner, set it either as a fixed CPM or a percentage of Marketplace Media Spend (Alpha participants only). This doesn't have to match the segment's standard fee, if set. For example, a segment with a CPM standard fee can have a percentage-based custom fee for a specific partner.
        OptionDescription

        CPM

        1. Click CPM.
        2. Enter the CPM value, up to $20 USD. This field is required. If no fee applies, enter 0.

        % of media (Alpha participants only)

        1. Click % of media.
        2. Enter the percentage value, up to 15 percent. This field is required. If no fee applies, enter 0.
        3. Optionally, in the up to field, enter the maximum CPM fee that the partner can be charged for this segment, up to $20 USD. For example, 10% of media with a $2 cap means the fee will never exceed $2 CPM.
      5. Click Add.

    Keep the segment private

    To keep your segment private, so no partners can see or use your segment:

    1. Click Custom.

    2. Under Standard fee (optional), do not enter a value.

    3. Under Partners (optional), do not select any partners.

    Share the segment with everyone

    To share your segment with all partners:

    1. Click Public.

    2. Under Standard fee, set the standard fee for this segment to define its global price for all partners. Select the fee's pricing model as either a fixed CPM or a percentage of Marketplace Media Spend (Alpha participants only):

      Note: Percentage of media is currently in alpha. If you would like to participate in the alpha program, contact your Index Representative.

      OptionDescription

      CPM

      1. Click CPM.
      2. Enter the CPM value, up to $20 USD. This field is required. If no fee applies, enter 0.

      % of media (Alpha participants only)

      1. Click % of media.
      2. Enter the percentage value, up to a maximum of 15. This field is required. If no fee applies, enter 0.
      3. Optionally, in the up to field, enter the maximum CPM fee that can be charged for this segment, up to $20 USD. For example, 10% of media with a $2 cap means the fee will never exceed $2 CPM.

      Note: This value appears as the Marketplace Vendor Fee in Reports in the Index UI and when targeting segments in a deal. For more information, see How segment fees work.

    3. Under Custom fees (optional), optionally set custom fees to override the standard fee for specific partners:

      1. Click ADD CUSTOM FEE.
      2. In the Partner drop-down list, select the partner that you want to apply custom fees to.
      3. Under Pricing model, set the custom fee as either a fixed CPM or a percentage of Marketplace Media Spend (Alpha participants only). This doesn't have to match the segment's standard fee. For example, a segment with a CPM standard fee can have a percentage-based custom fee for a specific partner.
        OptionDescription

        CPM

        1. Click CPM.
        2. Enter the CPM value, up to $20 USD. This field is required. If no fee applies, enter 0.

        % of media (Alpha participants only)

        1. Click % of media.
        2. Enter the percentage value, up to a maximum of 15. This field is required. If no fee applies, enter 0.
        3. Optionally, in the up to field, enter the maximum CPM fee that the partner can be charged for this segment, up to $20 USD.
      4. Click Add.
  9. Click REGISTER.

After you finish: Send segments files using storage buckets