Sample Code: CSV to New Item
If you have enabled the API for your system and are ready get started, I highly recommend checking out our sample code collection. If you have PHP installed on your server, I recommend experimenting with the API Tester file. It serves as an excellent testing tool to get started with the API. Furthermore, the code contains functions that you can reuse to create your own custom solutions.
I was able to create a quick program in less than an hour that imports items into your FreshBooks system from a comma delimited text with some small changes to the API Tester file.