We get requests sometimes from users of older integrations, asking for their list ID’s. It varies by account, but about a year ago, our accounts stopped showing list ID’s in the URL of some pages. Now, the only way to get list ID’s is through the API.
Some 3rd party integrations with Constant Contact are requiring users to know the listId instead of the list name for some actions. This post explains how you can obtain the listIds for all of your contact lists.
Ideally, the application should just pull the listIds in an account automatically, show users the name of the list, and allow them to select which lists to use. Users should not be asked to provide this information. We encourage you to submit feedback to the company that developed the app you’re using to ask them to pull lists automatically without asking you for the list ID. The app developers can email email@example.com for help. We want to make this as painless as possible.
As a workaround, you can use the following steps to obtain the list ID’s in your account:
"name": "Best Opportunities",