User ID module

Last edited: 2024/12/09

The User ID module supports various methods of establishing pseudonymous IDs for users, which significantly increases the value of header bidding. Instead of multiple exchanges syncing IDs with numerous demand sources, you can integrate with several different ID schemes, streamlining the process.

See Prebid documentation on User ID modules: link

You can use:

• Own accounts - meaning that you have direct contact signed with a given user ID module provider

• Yieldbird accounts - meaning you do not have a direct contract signed with an ID module provider, and want to use Yieldbird’s contract.

Good practice: User ID providers are paid for by the buy side, so using Yieldbird accounts is completely free of charge. This can save you a lot of time spent on the legal process of signing a direct contract with the provider.

Is there privacy compliance with Prebid’s User ID Module?

When combined with the Consent Management module (Consent management), privacy regulations are enforced by User ID module as follows:

• The module verifies the GDPR consent string.
• If the consent string is absent or the user has not agreed to Purpose 1 (local storage):
• No calls are made to external user ID vendors.
• No data is stored in cookies or HTML5 local storage.

Adding a User ID modules

If you can’t find the User ID that you want to add on the list, please let us know!

We can add any User ID that is currently compatible with Prebid. Simply ask your Customer Success Manager for the User ID you need, and we will add it in the next development sprint.

See the list of User ID sub-modules that can be added in the Prebid.org documentation.

Please mark that in case you need Yieldbird to provide you with the account, the process will take longer as we will have to sign a contract with the requested User ID provider.

The list of currently integrated User Id sub-modules: see list.

You can choose to use either your own accounts or Yieldbird’s accounts within the User Id Modules. The setup flow is the same for both options: First, add the Module to your Workspace, then connect it to specific Domains and optionally adjust its settings.

1. Adding User ID module on Workspace level

To add a Vendor Specific Module to the workspace and define its default parameters:

1. Go to Global setup > Prebid > Modules > User IDs and click ‘Add new’.
2. Based on your account type, follow the steps below:
• For Your Own Account:
1. Select Account type as Own, then choose the User ID you want to configure from the dropdown menu.
2. Fill in the required parameters and click ‘Save’. You will be redirected to the overview table of all User IDs where the newly added module will appear at the top of the list.


In this view, you set Default Parameters that apply to all Domains. If you need to set different parameters for specific Domains you can do it later on (see the paragraph below).

• For Yieldbird’s Account (used when you do not have a direct contract with the module provider):
1. Select Account type as Yieldbird, choose the module from the dropdown menu, and click ‘Save’.
2. The necessary params will be automatically handled by the Platform
3. To activate the module on your inventory:
1. Toggle it <on> at the Workspace level:

2. Activate it for specific Domains (see the instructions below).


In this view, you set Default Parameters that apply to all Domains. If you need to set different parameters for specific Domains you can do it later on (see the paragraph below).

Activating User ID modules on specific Domains

To enable a User ID Module for specific Domains:

1. Go to Global setup > Prebid > Modules > User IDs and click the module you want to activate for a specific Domain.
2. Navigate to the Module params & connection tab.
3. Use the On/off on Domain toggle to enable the module for your selected Domains.
4. Optionally, customize the module parameters for specific Domains:
• Provide values in the input boxes for the parameters you wish to customize.
• Leave the input boxes empty to apply the default workspace parameters.
• For each Domain you can customize a single param or all params.
5. Click ‘Save’.

You can also manage User ID Modules connection directly within the Domains view:

1. Go to Inventory > Domains > select the Domain to edit > Prebid Stack.
2. Scroll down to the Modules paper and use the On/off on Domain toggle to enable the desired User ID Module for that Domain.
3. Click ‘Save’.

Attention: Remember - the Module will be active on a given Domain only if it is toggled <on> on Workspace.

Some User id modules may require adjusting auctionDelay. Learn more about how to do this.

On this page:

• User ID module
• Is there privacy compliance with Prebid’s User ID Module?
• Adding a User ID modules
• 1. Adding User ID module on Workspace level
• Activating User ID modules on specific Domains