This blog post explains how you could insert data from a CSV file into CiviCRM. We use Pentaho Data Integration to read the CSV file and to call a Form Processor in CiviCRM.
This blog post is an example and when you follow the steps described in this post you can run the same import as me.
Pentaho is a tool to extract and transform data.
The form processor is an extension to create end points for forms in CiviCRM. Those end points can then be called through the api.
Prerequisites: