API IDs are used to in REST method calls. You can find various IDs for your list by accessing the API information in Listrak.
Select the desired list from the list panel.
Navigate from the home menu to Support.
Go to API.
Then API ID Information.
API INFORMATION PAGE
What you see on the API information page varies depending upon the external events and list segmentation set up for your account.
LIST ID DETAILS
This section contains the list title and list ID.
USERS WITH LIST ACCESS
If you have multiple users on your account, this section displays all the users that have access to your list and what specific access they have.
EXTERNAL EVENT IDS
If you have external events set up on your list, this section lists the IDs that are associated with those external events. If you are using the API to fire an external event, you will need to use these IDs. For example, if you want to use the API to fire an external event to get customers into your welcome series, use the appropriate ID found here.
This section shows lists the IDs associated with every segment that is set up on your list. These IDs will come in handy if you want to, for instance, pass specific segment values to Listrak using the API. Use the appropriate ID associated with that segment.