How to create or update multiple users with attributes for testing fast via API

This method will allow you to create or update multiple users and assign user attributes to them via our API. This helps for faster testing of campaigns and other activities that require tailored user profiles populated with specific data.


  1. Install Postman - a program that makes working with API easy and user-friendly
  2. Import and setup your API key variables for Leanplum's API collection from our documentation (Run in Postman button)
  3. Select the multi | CSV upload no file API call from the side menu
  4. Navigate to the Body of the request and paste a comma-separated CSV containing the users to create/update.
  5. Send the API call and check the Audiences page to confirm the changes.

    Example in Postman:


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