How can I bulk import a list of records into a static list via API?

[katy_rodriguez]

I need to import a list of records into a static list. All of these records already exist in Marketo, we are just creating audiences in an external tool and need to populate a list weeky.

Looking at the 'Add to list' endpoint, this would import 1 record at a time, correct?Is there a more efficient way to bulk import lists of thousands of leads into a list?

[SanfordWhiteman]

As noted on your other thread, you can add 300 leads at a time using Add to List.

You can also use the Bulk Import API, which is metered by the size of the file (10 MB max) as opposed to # of leads. If you only have one column in the file for the Lead ID, you can add hundreds of thousands of leads that way. https://developer.adobe.com/marketo-apis/api/mapi/#tag/Bulk-Import-Leads